Submitted by JUAN DAVID SOLANO MENDONZA null (juan.solanomendoza@gmail.com) on 2017-04-19T18:30:02Z No. of bitstreams: 1 dissertaçao JUAN MENDOZA.pdf: 1111206 bytes, checksum: 0b4a862173ec55a33d92959d7331d935 (MD5) / Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-04-19T19:56:57Z (GMT) No. of bitstreams: 1 solanomendoza_jd_me_bot.pdf: 1111206 bytes, checksum: 0b4a862173ec55a33d92959d7331d935 (MD5) / Made available in DSpace on 2017-04-19T19:56:57Z (GMT). No. of bitstreams: 1 solanomendoza_jd_me_bot.pdf: 1111206 bytes, checksum: 0b4a862173ec55a33d92959d7331d935 (MD5) Previous issue date: 2017-02-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A batata-doce é uma das principais hortaliças cultivadas no mundo, as suas raízes tuberosas têm múltiplos usos na alimentção humana e animal e na produção industrial de farinha, amido e etanol. Os teores de compostos biativos, caracteristicas fisico-quimicas de quailidade pós-colheita e produtividade, podem diferir entre genótipos e idade da planta. O Vale do Ribeira é uma região de comunidades tradicionais que mantêm diferentes acessos de batata-doce. Este estudo foi realizado de fevereiro a outubro de 2015, o objetivo principal foi realizar a caracterização físico-química e de produtividade de três acessos de batata-doce pertencentes ao Banco de Germplasma da Universidade Estadual Paulista.Registro. As análises do experimento foram feitas nos acessos VR 13-01 (casca roxa e polpa roxa fortemente pigmntada), VR13-11 (casca rosa e polpa branca) e VR13-50 (casca creme e polpa branca). O delineamento experimental foi em blocos casualizados com seis repetições por tratamento e cada parcela tinha 5 plantas.O espaçamento de plantio entre plantas foi de 0,25 m e 0,80 m entre linhas. As avaliações das analises físico-químicas, compostos bioativos e produtividade foram feitas aos 120,150 e 180 dias após o plantio. Foram determinados a produçao total de matéria fresca da parte aérea, produçao total de matária seca da raiz, produtividade total de raizes, produtividade comercial de raízes, produção de raizes não comercias , teor de sólidos solúveis , teor de amido, comteúdo de compostos fenólicos totais, flavonoides totais, antocianinas totais e capacidade antioxidante. As características selecionadas pela PCA foram submetidas a análise de variância, complementadas pelo teste de Scott-Knott, a 5% de probabilidade. Considerou-se significativo quando p<0,05. Comparando os três acessos o VR 13­ 01 mostrou os maiores teores de sólidos solúveis (16,6 ° Brix), antocianinas totais (111,6 mg 100 g;1 e o VR13­50 apresentou o maior teor de amido (25,3%) e produtividades mais elevadas ( 43.011kg ha-1). / The sweet potato is one the most grown vegetable crops in the world, its storage roots have multiple uses as human and animal foods and in industrial production of flour, starch and ethanol. The starch and sugar content may differ genotypes and harvest season. The Vale do Ribeira region has traditional communities keep different accessions of sweet potato. This study was conducted from February to October 2015, and main objetive was the physico-chemical characterization, bioactive compounds and productivity of three accessions of sweet potato belonging to the Germplasn Bank of Universidad Estadual Paulista. Accession were VR 13-01 (purple skin and strongly purple pulp).VR13-11( lightly purple skin and white pulp) and VR13-50 ( cream skin and white pulp).The experimental design was randomized blocks with six replications per treatment and each plot had 5 plants. The planting distance between plants was 0.25 m and 0.80 m between rows. The biochemical , physico chemical characterization and production yields was made 120,150 and 180 days after planting. The total productions yield, soluble solids content, and starch content were determined and significant differences among accessions obtained by ANOVA and means separated by a Scott-Knott test. Comparing all three accessions. VR13-01 showed highhest soluble solid content (16,6° Brix), anthocyanin content (111,6 mg 100-1 and accessions VR13-50 showed the highest starch content (25,3 %) and the highest production yields (43.011 Kg ha 1).

Tomando como ponto de partida as intervenções no mundo rural, este estudo procura abordar as questões ligadas ao comportamento alimentar vivenciado face à introdução da batata-doce de polpa alaranjada nos hábitos alimentares de agricultores moçambicanos. O trabalho de pesquisa foi conduzido em Moçambique, com famílias rurais de Murrupula e Mogincual, distritos da província de Nampula. O texto, construído de modo a tomar como ponto de partida para a reflexão as falas dos interlocutores, percorre um passado histórico sobre a produção e consumo da batata-doce em geral, mas concentra-se na variedade de polpa alaranjada, objeto de política pública de intervenção para a promoção de Segurança Alimentar e Nutricional. Nesse sentido, procuramos apreender em que medida a introdução da batata-doce de polpa alaranjada interferiu ou interfere socioculturalmente no comportamento alimentar e na divisão do trabalho familiar. As festas tradicionais, que constituem um ambiente tanto de sociabilidade como de consumo de alimentos, foram também alvo de interesse desta pesquisa. Constatamos que a batata-doce de polpa alaranjada não faz parte do alimento principal das famílias rurais estudadas e que, nas festas tradicionais, em que se expressa a cultura local, a batata-doce não está presente, diferentemente do que ocorre com a mandioca. O trabalho busca refletir sobre a valorização cultural dos alimentos entre os grupos estudados, evidenciando o estigma a que está associada a batata-doce e, desse modo, indicando a necessidade de redirecionamento do alimento a ser usado como fonte de nutrição para aquelas famílias rurais. / Teniendo como punto de partida las intervenciones en el mundo rural, este estudio trata de abordar las cuestiones relacionadas a la conducta alimentaria con experiencia en la introducción de la batata de pulpa anaranjada en los hábitos alimentarios de los agricultores mozambiqueños. La investigación se realizó en Mozambique, con familias rurales de Murrupula y Mogincual, comarcas de la provincia de Nampula. El texto fue realizado de modo que la intervención de los interlocutores fuera el punto de partida para la reflexión, recorre un pasado histórico sobre la producción y el consumo de la batata en general, pero se concentra en la variedad de la pulpa anaranjada; objeto de política pública de intervención para la promoción de la Seguridad Alimentaria y Nutricional. En este sentido, tratamos de comprender en cuál medida interfirió o interfiere socialmente y culturalmente en la conducta alimentaria y en la división del trabajo familiar. Las fiestas tradicionales, que constituyen un ambiente tanto de sociabilidad como de consumo de alimentos, también fueron puntos de interés de la presente investigación. Constatamos que la batata de pulpa anaranjada no hace parte del alimento principal de las familias rurales estudiadas y que en las fiestas tradicionales, cuando la cultura local se expresa, la batata no está presente; de manera distinta de lo que ocurre con la yuca. El trabajo trata de reflexionar sobre la valorización cultural de los alimentos entre los grupos estudiados, evidenciando el estigma en el cual está asociada la batata y, de esa forma, indicando la necesidad de un redireccionamiento del alimento a ser utilizado como fuente de nutrición para aquellas familias rurales.

Sweet potato [Ipomoea batatas (L.) Lam] is technically a perennial plant, cultivated and explored as an annual crop. Thus, the identification of the cultivation cycle and sweet potato clones is important for a better utilization of this crop, in both, human and animal nutrition, as for ethanol production. The aim of this work was to evaluate the performance of sweet potato clones grown in different cultivation cycles. The experimental design was a randomized block design, in a split-plot scheme, with three replications. We tested in the plots three cultivation cycles (3, 5 and 7 months), and in the split plots, six sweet potato clones (accessions IBP-007, IBP-038, IBP-075, IBP-079 and IBP-149, and cultivar Brazlândia Rosada). The experiment was carried out at the Research Farm "Campus Rural da UFS", located in the municipality of São Cristovão-SE. The analyzed variables were: survival, damages caused by soil insects, fresh and dry weight of the aerial part, total root yield, content of root dry matter, starch and amylose, and yield of starch and ethanol. All variables were subjected to analysis of variance with the F test, and when significant, the means were compared by the Skott-Knott test at 5% probability. The lowest survival rates occurred in the seventh month of cultivation (51.11%), together with the greatest damage caused by soil insects (4.29), where the clones IPB-038 (2.84), IPB-075 (3.01) and IPB-149 (2.88) showed resistance at the seven month cultivation cycle. Clone IPB-007 presented high values of fresh (14.07 t.ha-1) and dry weight (2.81 t.ha-1) of the aerial part in all the cultivation cycles, presenting also high yield of roots (33.16 t.ha-1), starch (6.63 t.ha-1) and ethanol (4,379 L.ha-1). For content of root dry matter (38.32%) and starch (26.70%), and ethanol yield (176.26 L.t-1), the clone IPB-149 stood out. There was no significant difference in amylose content. The starch content (13.94%) and the yield of roots (7.53 t.ha-1), starch (1.64 t.ha-1) and ethanol (1,034 L.ha-1 and 92.04 L.t-1) were lower for most of the clones evaluated with three months of cultivation. We recommend the use of the cultivation cycle of five months. / A batata-doce [Ipomoea batatas (L.) Lam.] é tecnicamente uma planta perene, plantada e explorada como anual. Sendo assim, a identificação do ciclo de cultivo e de clones de batata-doce é importante para um melhor aproveitamento dessa cultura, tanto na alimentação humana e animal, como para produção de etanol. O objetivo do presente trabalho foi avaliar o desempenho de clones de batata-doce cultivados em diferentes ciclos de cultivo. O delineamento experimental foi o de blocos casualizados, em esquema de parcelas subdivididas, com três repetições. Foram testados nas parcelas três ciclos de cultivo (3, 5 e 7 meses), e nas subparcelas, seis clones de batata-doce (acessos IBP-007, IBP-038, IBP-075, IBP-079 e IBP-149, e a cultivar Brazlândia Rosada). O experimento foi implantado na Fazenda Experimental Campus Rural da UFS , localizada no Município de São Cristovão-SE. As variáveis analisadas foram: sobrevivência, danos causados por insetos de solos, massa fresca e seca de parte aérea, produtividade total de raízes, teor de matéria seca de raiz, amido e amilose e rendimento de amido e etanol. Todas as variáveis foram submetidas à análise de variância com teste F e, quando significativa, as médias foram comparadas pelo teste de Skott-Knott ao nível de 5% de probabilidade. Os menores índices de sobrevivência ocorreram no sétimo mês de cultivo (51,11%), juntamente com os maiores danos causados por insetos de solo (4,29), onde os clones IPB-038 (2,84), IPB-075 (3,01) e IPB-149 (2,88) apresentaram resistência no ciclo com sete meses. O clone IPB-007 apresentou elevados valores de massa fresca (14,07 t.ha-1) e seca (2,81 t.ha-1) de parte aérea, em todos os ciclos de cultivo, apresentando também, alta produtividade de raiz (33,16 t.ha-1), amido (6,63 t.ha-1) e etanol (4.379 L.ha-1). Já para teor de matéria seca de raiz (38,32%) e amido (26,70%) e rendimento de etanol (176,26 em L.t-1), o clone IPB-149 se destacou. Não houve diferença significativa para o teor de amilose. O teor de amido (13,94%) e o rendimento de raiz (7,53 t.ha-1), amido (1,64 t.ha-1), e etanol (1.034 L.ha-1 e 92,04 L.t-1) foram menores para a maioria dos clones avaliados no ciclo com três meses de cultivo. Recomenda-se usar o ciclo de cultivo de cinco meses.

Submitted by Maria Beatriz Vieira (mbeatriz.vieira@gmail.com) on 2018-06-11T16:27:45Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) resumo_dissertacao_daniele_de_souza_masiero.pdf: 23649 bytes, checksum: 3c666bef05b41b7c3704d03fde630a6b (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-06-11T16:56:41Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) resumo_dissertacao_daniele_de_souza_masiero.pdf: 23649 bytes, checksum: 3c666bef05b41b7c3704d03fde630a6b (MD5) / Made available in DSpace on 2018-06-11T16:56:42Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) resumo_dissertacao_daniele_de_souza_masiero.pdf: 23649 bytes, checksum: 3c666bef05b41b7c3704d03fde630a6b (MD5) Previous issue date: 2017-06-27 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / O cultivo in vitro é uma importante ferramenta para a propagação da batata-doce e diferentes fatores podem interferir na exequibilidade desta técnica, como a composição do meio de cultura e o microambiente no qual as plantas são expostas. O presente estudo teve como objetivo avaliar o desempenho das cultivares BRS Amélia, BRS Cuia e BRS Rubissol de batata-doce, cultivadas in vitro em duas concentrações de sacarose, duas combinações de espectro luminoso e dois sistemas de cultivo. Para isso o trabalho foi dividido em três experimentos: no primeiro, testou-se duas concentrações de sacarose em biorreator de imersão temporária configurado na combinação de espectro vermelho e branco; no segundo utilizou-se duas concentrações de sacarose em biorreator de imersão temporária configurado na combinação de espectro vermelho e azul; no terceiro, testou-se duas concentrações de sacarose em meio semissólido configurado na combinação de espectro vermelho e branco. O delineamento experimental utilizado foi inteiramente casualizado, em esquema fatorial 2x3: duas concentrações de sacarose (15g L-1 ou 30g L-1) e 3 cultivares (BRS Amélia, BRS Cuia e BRS Rubissol). As variáveis analisadas foram: comprimento de parte aérea, número médio de folhas, número e comprimento de raízes, número e comprimento de brotações, índices de clorofila a, b e total e porcentagem de aclimatização. Para os três experimentos o uso de 30g L-1 de sacarose no meio de cultivo resultou nas maiores médias em todas as variáveis analisadas e a cultivar BRS Cuia foi a que apresentou o melhor desempenho nas condições estudadas. No sistema semissólido foi possível verificar um grande número e comprimento de raízes, enquanto que no sistema de imersão temporária foi verificada presença de brotações em todas as cultivares e maiores médias de comprimento de parte aérea. Concluiu-se que a concentração de 30g L-1 de sacarose no meio de cultura proporciona taxas satisfatórias de crescimento e aclimatização das três cultivares em estudo, sendo recomendada para a micropropagação da espécie. A combinação de espectro luminoso vermelho e azul proporciona maior comprimento de parte aérea, número de folhas e comprimento de raiz quando comparado ao espectro vermelho e branco. A „BRS Rubissol‟ tem melhor desempenho no sistema convencional, a „BRS Amélia‟ no sistema de imersão temporária, enquanto a „BRS Cuia‟ desenvolve-se igualmente independente do sistema de cultivo utilizado. / In vitro cultivation is an important tool for the propagation of sweet potatoes and different factors may interfere with the feasibility of this technique, such as the composition of the culture medium and the microenvironment in which the plants are exposed. The objective of this study was to evaluate the performance of BRS Amélia, BRS Cuia and BRS Rubissol sweet potato cultivars grown in vitro in two concentrations of sucrose, two combinations of light spectrum and two cultivation systems. For the work in division in three experiments: in the first, two concentrations of sucrose in temporary immersion bioreactor configured in the combination of red and white spectrum were tested; In the second, two concentrations of sucrose in a temporary immersion bioreactor configured in the combination of red and blue spectrum are used; In the third, two concentrations of sucrose in semisolid medium configured in the red and white spectrum combination were tested. The experimental design was completely randomized in a factorial 2x3: two concentrations of sucrose (15g L-1 or 30g L-1) and 3 cultivars (BRS Amélia, BRS Cuia and BRS Rubissol). The analyzed variables were: shoot length, number of leaves, number and length of roots, number and length of buds, chlorophyll a, b and total rate and percentage of acclimatization. For the three experiments, the use of 30g L-1 of sucrose in the culture medium resulted in the highest averages in all analyzed variables and the cultivar BRS Cuia was the one that presented the best performance under the conditions studied. In the semisolid system it was possible to verify a large number and length of roots, whereas in the temporary immersion system, the presence of sprouts was verified in all the cultivars and larger averages of shoot length. It was concluded that the concentration of 30 g L-1 of sucrose in the culture medium provides satisfactory rates of growth and acclimatization of the three cultivars under study, being recommended for the micropropagation of the species. The combination of red and blue light spectrum provides greater shoot length, number of leaves and root length when compared to the red and white spectrum. 'BRS Rubissol' performs better in the conventional system, 'BRS Amelia' in the temporary immersion system, while 'BRS Cuia' is also developed independent of the culture system used.

Sweetpotato (Ipomoea batatas (L.) Lam.) is a root crop well established throughout the world's tropical and sub-tropical regions. Despite sweepotato's importance, it has been under-researched relative to many other major crops. The main objective of this thesis is to contribute to a fuller understanding of the genetic and physiological factors underlying the production of sweetpotato storage roots for human consumption. The sweetpotato genome is diverse and subject to high levels of natural somatic mutation. Applying the AFLP (amplified fragment length polymorphism) technique allowed a direct comparison of inter and intra-cultivar DNA (deoxyribonucleic acid) base sequence variation. Analysis of the variation indicated that although sweetpotatoes are clonally propagated, clones show a lack of genetic fidelity to their source. Further, the level of genetic variation within the cultivar 'Owairaka Red' indicated the continuing emergence of distinct new strains. Plant field establishment represents the interaction of both propagation and growth phases of storage root production. A range of establishment techniques were investigated in a field trial under commercial conditions. Sprouts cut from seed roots and held for six days rather than immediate planting improved establishment as measured by growth, at little expense. Plug raised plants also improved establishment, while potentially reducing the degree of intra-cultivar genetic variation. Plant carbohydrate partitioning in three cultivars, 'Beauregard', 'Beniazuma' and 'Owairaka Red' was examined by field trial over the period of storage root growth. While cultivars differed in the proportions of dry matter partitioned to leaf, stem and root organs, the cultivar specific ratios of leaf to stem dry weight were relatively stable over time. Total storage root dry weight increased with time for all cultivars, but the distribution of storage root grades by size was cultivar specific. Within the storage roots % dry weight increased over time in all cultivars, but total sugar concentration only increased for 'Beauregard' and 'Beniazuma'. Finally, a storage root disorder called 'brown centre' curtails the temperate growing season so was investigated using low temperature storage and a field trial with various nutrition regimes. The disorder was found to be associated with susceptible germplasm, high soil nitrogen and harvest time.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:36Z No. of bitstreams: 5 50.pdf: 601131 bytes, checksum: 40ec6f06ce6ce603d177d20c34d83fbd (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:17:39Z (GMT) No. of bitstreams: 5 50.pdf: 601131 bytes, checksum: 40ec6f06ce6ce603d177d20c34d83fbd (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:17:39Z (GMT). No. of bitstreams: 5 50.pdf: 601131 bytes, checksum: 40ec6f06ce6ce603d177d20c34d83fbd (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Objetivou-se selecionar gen?tipos de batata-doce mais produtivos e de melhor qualidade nutricional e avaliar a qualidade da silagem de ramas e de ra?zes de batata-doce. Foram realizados dois ensaios. Com o primeiro ensaio objetivou-se selecionar gen?tipos de batata-doce de melhores caracter?sticas de produ??o de ramas e avaliar a composi??o bromatol?gica das ramas emurchecidas de batata-doce e de suas silagens. O experimento foi conduzido na Fazenda Rio Manso, da UFVJM, em Couto Magalh?es de Minas - MG. Foi utilizado o delineamento em blocos ao acaso, com quinze gen?tipos de batata-doce: BD-31TO, BD-26, BD-13, BD-17, BD-22, BD-24, BD-54, BD-56, BD-69, BD-43, BD-44, BD-46, BD-52, BD-35 e a cultivar comercial Brazl?ndia Rosada, com tr?s repeti??es. Apenas para o n?mero de folhas por metro linear n?o foram observadas diferen?as significativas entre os gen?tipos. A maioria dos gen?tipos estudados apresenta m?dia a alta produtividade de massa verde (PMV) e de massa seca das ramas (PMS). Devido ? exist?ncia de correla??o entre o comprimento da haste principal (CH) e a PMS, pode-se em futuros trabalhos mensurar o comprimento da haste visando maiores PMS. N?o foram observadas diferen?as significativas entre os gen?tipos para os teores de carboidratos sol?veis das ramas emurchecidas e silagens das ramas. Foram encontradas diferen?as significativas para os teores de mat?ria seca (MS), cinzas, prote?na bruta (PB), fibra em detergente neutro (FDN), fibra em detergente ?cido (FDA) e lignina. Para as ramas emurchecidas, os gen?tipos BD-26, BD-13, BD-56, BD-46, BD-35 e Brazl?ndia Rosada apresentaram as composi??es bromatol?gicas mais adequadas. O n?mero de folhas na cultura da batata-doce n?o possui rela??o com a qualidade bromatol?gica de suas ramas. Para as silagens das ramas, o gen?tipo BD-56 proporcionou as melhores caracter?sticas bromatol?gicas. Com o segundo ensaio objetivou-se avaliar caracter?sticas de produtividade de ra?zes, a composi??o bromatol?gica das silagens de ra?zes e o potencial de produ??o de prote?na bruta de diferentes gen?tipos batata-doce. Foi utilizado o delineamento em blocos ao acaso, com dez tratamentos e duas repeti??es, sendo os gen?tipos de batata-doce oriundos do banco de germoplasma da UFVJM (BD-31TO, BD-17, BD-22, BD-24, BD-54, BD-69, BD-43, BD-46, BD-52 e BD-35). As parcelas foram compostas por duas leiras de 3,0 m, com 0,90 m entre leiras e 0,30 m entre plantas. Na colheita foram avaliadas as caracter?sticas de produtividade total de ra?zes (PTR) e produtividade comercial de ra?zes (PCR), n?o sendo observadas diferen?as significativas entre os gen?tipos para essas caracter?sticas. As PTR e PCR foram baixas, abaixo da m?dia nacional. Para os teores m?dios de MS, nitrog?nio amoniacal (%N-NH3 NT-1), FDN e lignina houve diferen?as significativas entre os gen?tipos avaliados. Os gen?tipos BD-17, BD-69 e BD-46 originaram silagens de raiz de melhores composi??es bromatol?gicas. A cultura da batata-doce possui alto potencial de produ??o de PB, com destaque para os gen?tipos BD-17, BD-54, BD-43, BD-46 e BD-52. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The objective of this study was to select genotypes of sweet potato more productive and better nutritional quality and evaluate the quality of silage branches and roots of sweet potato. Two experiments were conducted. With the first experiment was aimed to select genotypes of sweet potato with best features of production of branches and assess the chemical composition of branches wilted sweet potato and its silages. The experiment was conducted at the Fazenda Rio Manso of the UFVJM in the city of Couto Magalh?es de Minas ? MG - Brazil. We used a randomized block design, with fifteen genotypes of sweet potato: BD-31TO, BD-26, BD-13, BD-17, BD-22, BD-24, BD-54, BD-56, BD-69, BD-43, BD-44, BD-46, BD-52, BD-35 and the commercial cultivar Brazl?ndia Rosada, with three replications. Only the number of leaves per linear meter no significant differences were observed among genotypes. Most genotypes has medium to high productivity of green mass (PGM) and dry mass of branches. Due the correlation between the length of the main branch (CB) and productivity of dry mass of branches (PDM), can in future studies to measure the length of the rod aiming higher PDM. No significant differences were observed among genotypes for soluble carbohydrates from branches and wilted silages of branches. Significant differences were found for dry matter (DM), ash, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin. For the wilted branches, genotypes BD-26, BD-13, BD-56, BD-46, BD-35 and Brazl?ndia Rosada presented better compositions bromatologic. The number of leaves in the culture of sweet potato has no relation with the chemical quality of their branches. For silages of branches, genotype BD-56 have the best qualitative characteristics. The second experiment aimed to evaluate characteristics of root yield, composition of silages of roots and the potential production of crude protein of sweet potato genotypes. We used a randomized block design with ten treatments and two replications, and the sweet potato genotypes from the germplasm bank of UFVJM (BD-31TO, BD-17, BD-22, BD-24, BD-54 , BD-69, BD-43, BD-46, BD-52, BD-35). The plots were composed of two piles of 3.0 m, with 0.90 m between furrows and 0.30 m between plants. At harvest, the characteristics evaluated were total root yields (TRY) and marketable yield of roots (MYR), no differences were observed among genotypes these characteristics. The TRY and MYR were low, below the national average. For the average levels of DM, ammonia nitrogen (% N-NH3.NT-1), NDF and lignin were no significant differences between genotypes. The genotypes BD-17, BD-69 and BD-46 showed the best results of composition of silages roots. The culture of sweet potato has a high potential for production of CP, especially with the genotypes BD-17, BD-54, BD-43, BD-46 and BD-52.

Made available in DSpace on 2014-06-11T19:29:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-07-07Bitstream added on 2014-06-13T20:39:32Z : No. of bitstreams: 1 oliveira_mc_me_sjrp.pdf: 400076 bytes, checksum: 0e0315e86bf7cc07d008613711a97bad (MD5) / O mercado de chips e snacks, particularmente àqueles obtidos de matéria-primas ricas em amido como banana, mandioca e mandioquinha-salsa, embora não suprem as necessidades diárias do indivíduo, vem ocupando um espaço cada vez maior, especialmente nos centros urbanos. O objetivo deste trabalho foi avaliar a composição nutricional, o perfil de ácidos graxos e as informações nutricionais dos rótulos das amostras de batatas chips e de snacks extrusados. Foram coletadas 10 amostras de batatas chips e 10 amostras de snacks extrusados, obtidas de três lotes diferentes. A análise nutricional, realizada pelos métodos oficiais, constou das determinações de umidade, proteínas, lipídios, cinzas, carboidratos totais, valor energético e sódio, calculado a partir do cloreto de sódio. O perfil de ácidos graxos obtido por cromatografia gasosa, sendo os picos identificados por tempos de retenção com padrões de ésteres metílicos e os resultados calculados e expressos g/100g da amostra. As informações nutricionais dos rótulos de ambos os produtos foram avaliados de acordo com as Resoluções RDC 359/03 e RDC 360/03. análise estatísticas dos resultados indicou que as interações entre marcas e lotes foram significativas para todas as determinações da composição nutricional, tanto as batatas chips como para os snacks extrusados. Os teores de sódio encontrados oscilaram entre 120 a 688 mg/100g para as batatas chips e 372 a 1.328 100g para os snacks extrusados. Os perfis de ácidos graxos determinados nas batatas chips e nos snacks extrusados provenientes de diferentes marcas foram, em média, 39,28 e 22,36% para ácidos graxos saturados, 39,75 e 10,69% para monoinsaturados, 18,62 e 38,18% para poliinsaturados e, 2,34 e 28,78% para trans, respectivamente. Quanto as informações nutricionais dos rótulos, os erros relacionados aos itens obrigatórios mais encontrados... / Junk foods like chips and snacks, which are starches’ sources of raw material, for example, banana, cassava and mandioquinha-salsa, don’t enhance the daily necessity of diary’s individuals, but are lots of consume in large urban centre. The aim of this study was evaluate the nutritional composition, the profile of fatty acids and the label information of samples of potato chips and extruded snacks. It was collected 10 samples of potato chips and extruded snacks from 10 samples, obtained from three different batches. The nutritional analysis was determined by official methods consisted of the determination of moisture, proteins, lipids, ash, total carbohydrates and energy. The analysis of sodium was performed using the determination of sodium chloride. The profile of fatty acids was obtained by gas chromatography and the peaks identified by retention time with standards of methyl esters and the results calculated and expressed as g/100g of the sample. The labels information of both of the products was evaluated according to the DRC 359/03 and 360/03 Resolutions. The statistics’ analysis of the results indicated that the interactions between brands and batches were significant for all determinations of nutritional composition, as for potato chips as for extruded snacks. The sodium levels ranged from 120 to 688 mg/100g for potato chips and from 372 to 1328 mg/100g for extruded snacks. The profiles of fatty acids presented by the potato chips and extruded snacks from different brands were on average 39.28 and 22.36% for saturated fatty acids, 39.75 and 10.69% for monounsaturated, 18.62 and 38.18% for polyunsaturated, and 2.34 and 28.78% for trans, respectively. As label information, the mistakes (errors) related to the compulsory items were on the conversion to kJ, compulsory declaration and declaration of nutrients per serving, for both products. As for the mistakes (errors)... (Complete abstract click electronic access below)

O presente trabalho foi realizado objetivando avaliar a qualidade das silagens de forrageiras tropicais e sua influência no desempenho de cordeiros da raça Santa Inês, manejados em sistema de confinamento. Foram utilizados cordeiros da raça Santa Inês, não castrados, distribuídos aleatoriamente em seus respectivos tratamentos, os quais foram: silagem de milho (SM); silagem de Capim-elefante com 15% de fubá de milho (SC); silagem de parte aérea de batata doce com 15% de fubá de milho (SPAB). Dispostos em delineamento em bloco casualizado com cinco repetições. As análises de matéria seca, nitrogênio amoniacal e pH não apresentaram diferenças estatísticas entre os tratamentos, porém para as demais análises de PB, CZ, CNF, FDN, FDA, entre outras, houve diferença (P<0,05) entre os tratamentos. Resultados esses que não modificam a qualidade das silagens, apenas, apresentando diferenças diante das suas características particulares. Observou-se também que os animais alimentados com silagem de milho, silagem da parte aérea da batata doce e a silagem com capim elefante apresentaram igualdade quanto as variáveis de desempenho, como: ganho de peso total, ganho médio diário, conversão alimentar, consumo de matéria seca e de fibras em detergente neutro (kg/dia e g/kg0,75), entretanto as únicas diferenças observadas foram relacionadas ao consumo de matéria seca em % PV que foram superiores no tratamento com a silagem de batata doce, não apresentando diferença na silagem de milho e na silagem de capim elefante. O consumo de fibras em detergente neutro (%PV) apresentou diferença entre as silagens de milho e da parte aérea da batata doce, no entanto, a silagem de capim elefante apresentou igualdade para ambos tratamentos. Permitindo concluir que as silagens de capim elefante, parte aérea da batata doce e de milho apresentaram bons resultados nos seus respectivos teores bromatologico, podendo ser utilizadas sem na alimentação de cordeiros da raça Santa Inês. / The present study was performed to evaluate the quality of silages of tropical forages and its influence on the performance of lambs Santa Inês, handled in feedlot. Were used lambs Santa Inês, not castrated, randomly distributed in their respective treatments, which were corn silage (SM); Elephant grass silage with 15% of corn (SC); silage shoots sweet potato with 15% of corn (SPAB). Arranged in a randomized block design with five replication. Analyses of dry matter, ammonia nitrogen and pH did not differ among treatments, but for the remaining analyzes of CP, CZ, NFC, NDF, ADF, among others, significant differences (P <0.05) between treatments. Results that do not change the quality of the silage, only with differences on their particular characteristics. It was also observed that animals fed corn silage, silage of shoots and sweet potato with elephant grass silage showed equal as the performance variables, such as total weight gain, average daily gain, feed conversion, dry matter intake and neutral detergent fiber (kg /day and PV0,75). However the only differences were related to the consumption of dry matter in % BW which were higher in the treatment with the sweet potato silage, no difference in corn silage and elephant grass silage.The use of neutral detergent fiber (% PV) showed differences between corn silage and shoots of sweet potatoes, however, the elephant grass silage showed equal for both treatments. Allowing us to conclude that the silage shoots sweet potato, elephant grass and corn showed good results in their respective bromatological levels and can be used without impairing the performance of Santa Inês lambs.

Morphological and anatomical studies demonstrated the root formation characteristics of sweet potato. The presence and importance of preformed root primordia is recorded for the first time. On the vines root primordia are present in sets of four to ten adjacent to the leaf bases. These roots originate from the procambium on both sides of the leaf gap. Macroscopically the root tips of preformed root primordia protruding through the cortex and epidermis of the stems are prominent. The preformed root primordia produce adventitious roots, with pentarch, hexarch or septarch steles. Storage roots will under normal circumstances only originate from undamaged root primordia on the nodes of cuttings, or on nodes of newly formed vines, or from wound roots originating from the cut ends of the stem or leaf cuttings. Lateral roots originating from damaged root primordia, or directly from the adventitious roots, exhibit tetrarch steles and develop into fibrous roots without the potential to develop into storage roots. This understanding of the origin, anatomy and morphology of sweet potato roots should improve production practices, which will contribute to improved crop establishment and increased yield. Differences in the contribution of individual subterranean nodes to storage root yield were studied. On average cuttings with three subterranean nodes produced 3.7 storage roots, with 33.2% on subterranean node 1, 30.0% on node 2 and 36.8% on node3. However, in terms of fresh mass of the storage roots node 1 contributed 45.4%, node 2 contributed 27.1% and node 3 contributed 27.4%. The effect of temperature (20, 24, 28 and 32oC constant), orientation of cuttings (vertical vs. horizontal) and size of cuttings (1 or 3 nodes) on the development of adventitious roots was observed in plant growth chambers. Twenty-one days after planting, the longest total root length of 4m per plant was recorded from the 24oC growth chamber. The effect of soil moisture content on early root development was investigated by wetting and equilibrating sandy soil to 100, 80, 60 and 40% of field capacity. Although the 80% of field capacity treatment resulted in the best root development, differences among treatments were small, demonstrating the capacity of cuttings to successfully establish under a range of soil moisture contents. Changes in dry mass of storage roots, stems, and leaves of three sweet potato cultivars (Awasa-83, Bareda and Falaha) were studied at Awasa and Melkassa. At the final sampling the early maturing cultivar Falaha had diverted a higher proportion of the total dry mass into storage roots at Melkassa because of the early initiation and growth of storage roots. The late maturing cultivar Awasa-83 had a smaller proportion of the total dry mass diverted into the storage roots at both locations because of late root initiation and growth. The high yielding cultivars Bareda at Melkassa, and Awasa-83 at Awasa, had higher crop growth rates and higher net assimilation rates than the other cultivars. The effects of cultivar (Kudadie, Bareda and Awasa-83), planting position (horizontal and vertical), type of planting material (terminal cuttings with and without leaves) and cutting length (20, 25 and 30 cm) on the number and yield of storage roots were quantified in field trials at Awasa and Melkassa. Cultivar Kudadie produced the highest storage root yield at both locations. Horizontal planting of cuttings resulted in the highest total storage root yield at both locations. Cutting length did not affect storage root number and yield. The effect of population density (50,000, 55,555, 75,000, and 100,000 cuttings per hectare) on the performance of the three Ethiopian sweet potato cultivars was studied at Awasa. The highest planting density consistently produced the best root yield, indicating the potential to increase yields with plant populations much higher than normally used. Early maturing cultivar Falaha produced more small and medium storage roots per plant, while the intermediate cultivar Bareda produced more large storage roots. Copyright 2003, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. Please cite as follows: Belehu, T 2003, Agronomical and physiological factors affecting growth, development and yield of sweet potato in Ethiopia, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-07262004-141704 / > / Thesis (PhD (Plant Production and Soil Science))--University of Pretoria, 2005. / Plant Production and Soil Science / unrestricted

PhD (Agric) (Food Science and Technology) / Department Food Science and Technology / In recent years, there has been a lot of interest in orange fleshed sweet potato (OFSP) [Ipomoea batatas (L.) Lam] cultivar, as a cheaper source of vitamin A. In Southern Africa, reports have shown that one in every three children has deficiency in vitamin A. This study investigated the variations in β-carotene (vitamin A precursor) content among selected OFSP cultivars grown in Limpopo Province, South Africa. In addition, the study investigated the effects of location on functional properties, total carotenoids and antioxidant profile of the sweet potato flour as well as their physicochemical, functional and nutritional properties. Four (4) sweet potato cultivars [Dagga, Bophelo, Impilo (orange fleshed) and Mvuvhelo (cream fleshed)] were obtained from two locations, namely, University of Venda (Univen) agricultural experimental farm and Tshiombo irrigation scheme (Tshiombo) and analysed for pasting, functional, physicochemical and nutritional properties. The sweet potato flours from these two locations were also analysed by computed tomographic (CT) scans for flour particle density. Mineral and microstructure of OFSP flours were analysed by scanning electron microscope (SEM). All measurements, except the tristimulus L* a* b* and other colour parameters from five replicates, were performed in triplicate. Statistical analysis was performed using a one-way analysis of variance and means were separated using Duncan’s multiple range test; P < 0.05 was considered to be statistically significant. Pearson’s correlation coefficients were used to determine the correlation among functional, physicochemical, nutritional and pasting properties of sweet potato flour. β-carotene content varied significantly between the two locations from 70.98 ± 0.8 μg/g (Tshiombo) to 86.09 ± 2.0 μg/g (Univen), among cultivars from 1.71 ± 0.0 μg/g (Mvuvhelo) to 201.50 ± 1.0 μg/g (Dagga) and among orange fleshed (Dagga, Bophelo and Impilo) flours from 28.38 ± 0.2 μg/g (Impilo) to 201.50 ± 1.0 μg/g (Dagga). There was a similar trend in the contents of α-carotene to that of β-carotene from the two locations, which ranged from 0.63 ± 0.0 mol/L (Tshiombo) to 1.01 ± 0.0 mol/L (Univen). Mvuvhelo had significantly the lowest α-carotene content (0.50 ± 0.0 mol/L) and Impilo the highest (1.28 ± 0.0 mol/L). The total carotenoids was highest for Impilo (7.56 μg/g) and lowest for Mvuvhelo (1.33 ± 0.1 μg/g) but did not vary significantly (P > 0.05) between ii the locations. The antioxidant activity, based on 2, 2-diphenyl-1picrylhydrazyl (DPPH) free radical scavenging activity, was significantly highest in Bophelo (63.37 ± 0.8 mMAAE ml-1) and lowest in Dagga (26.93 ± 1.4 mMAAE ml-1) flours. The ferric reducing antioxidant power (FRAP) varied significantly across the locations and among the cultivars and ranged from 14.45 ± 0.3 μMTE ml-1 (Tshiombo) to 17.40 ± 1.1 μMTE ml-1 (Univen). FRAP was significantly highest in Impilo (21.12 ± 2.1 μMTE ml-1) and lowest in Mvuvhelo (8.16 ± 2.0 μMTE ml-1). Total carotenoid content positively correlated with DPPH (0.486*), FRAP (0.830**), β-carotene (0.370*), and α-carotene (0.424*). The antioxidant content and the radical scavenging activity were significantly correlated (0.563**). Vitamin A content was significantly lowest (6.88 ± 0.38 μg/g retinol) in Dagga flour and highest (7.97 ± 0.25 μg/g) in Impilo flour. Protein content varied significantly across the two locations and ranged from 4.23% (Tshiombo) to 7.16% (Univen). Dagga had significantly the lowest (3.47%) protein content while Impilo had the highest (7.53%). The fat content of the flours varied significantly between the two locations ranging from 0.63% (Tshiombo) to 1.01% (Univen). The protein content was positively correlated 0.594** and 0.421* to vitamin A and fat contents respectively. The Bophelo colour luminosity was significantly lower (L* 76.2) than the other two OFSP, Dagga (L* 83.51) and Impilo (L* 82.07). Bophelo a* (14.09) also differed significantly across all sweet potato cultivars. All cultivars differed significantly in b* values. Colour intensity (ΔE*) ranged from 15.87 to 38.48 for Mvuvhelo and Bophelo, respectively. Chroma ranged from 87.52 to 84.95 for Dagga and Mvuvhelo respectively. Total starch content was significantly different in all sweet potato cultivars and ranged from 244.07 μg/100 g (Bophelo) to 325.04 mg/g (Dagga). Resistant starch differed significantly in all sweet potato cultivars ranging from 1.21 μg/100 g dwb (Bophelo) to 7.07 μg/100 g dwb (Impilo). Ash content was significantly different in all cultivars and ranged from 3.17% (Dagga) to 3.79% (Bophelo). Water holding capacity (WHC) varied significantly across the two locations and ranged from 1.44 g H2O/g DM (Tshiombo) to 1.72 g H2O/g DM (Univen). Bophelo had significantly the lowest (1.27 g H2O/g DM) WHC and Impilo the highest (1.99 g H2O/g DM). The ash content negatively correlated to total starch (-0.928**) but positively iii correlated to WHC (0.654**). Peak viscosity differed significantly across all cultivars under study and ranged from 126.54 RVU (Bophelo) to 302.36 RVU. (Dagga). There was significant difference in trough viscosity across all cultivars ranging from 55.97 RVU (Impilo) to 280.78 RVU (Dagga). There were significant differences in the final viscosity across all cultivars ranging from 78.99 RVU (Impilo) to 319.26 (Dagga). Peak time viscosity varied significantly across all cultivars ranging from 3.87 min (Impilo) to 8.47 min. (Bophelo). Dagga cultivar had significantly the highest pasting temperature (94.16oC) and Bophelo the lowest (77.75oC). The setback viscosity was significantly highest 51.10 RVU (Mvuvhelo) and lowest 23.01 RVU (Impilo). All cultivars from the two locations consistently showed high potassium content ranging from 0.46% (Impilo) to 1.38% (Dagga) as compared to other minerals such as magnesium, calcium and chlorine which ranged from 0.16% (Impilo) to 0.34%. (Dagga). The CT scans revealed that there was a possibility of evaluating the effect of location on the density of granules of sweet potato flour and also the inherent differences in granular distribution of various sweet potato cultivars. SEM revealed high amounts of potassium, magnesium and chlorine. A profile of physicochemical and functional properties of flour of some of the OFSP cultivars produced in Limpopo province, South Africa has been drawn. This study also highlights the nutritional quality of the flour from four sweet potato cultivars and provides a ranking of flour to help the producers in the selection process. Bophelo flour was ranked the highest in terms of β- and, α-carotenes, total carotenoids and antioxidant capacity while Impilo was ranked highest in terms of functional properties and ash content. This study has highlighted significant differences in a number of parameters measured among the sweet potato cultivars. Therefore, in order to derive the maximum benefit from aIn recent years, there has been a lot of interest in orange fleshed sweet potato (OFSP) [Ipomoea batatas (L.) Lam] cultivar, as a cheaper source of vitamin A. In Southern Africa, reports have shown that one in every three children has deficiency in vitamin A. This study investigated the variations in β-carotene (vitamin A precursor) content among selected OFSP cultivars grown in Limpopo Province, South Africa. In addition, the study investigated the effects of location on functional properties, total carotenoids and antioxidant profile of the sweet potato flour as well as their physicochemical, functional and nutritional properties. Four (4) sweet potato cultivars [Dagga, Bophelo, Impilo (orange fleshed) and Mvuvhelo (cream fleshed)] were obtained from two locations, namely, University of Venda (Univen) agricultural experimental farm and Tshiombo irrigation scheme (Tshiombo) and analysed for pasting, functional, physicochemical and nutritional properties. The sweet potato flours from these two locations were also analysed by computed tomographic (CT) scans for flour particle density. Mineral and microstructure of OFSP flours were analysed by scanning electron microscope (SEM). All measurements, except the tristimulus L* a* b* and other colour parameters from five replicates, were performed in triplicate. Statistical analysis was performed using a one-way analysis of variance and means were separated using Duncan’s multiple range test; P < 0.05 was considered to be statistically significant. Pearson’s correlation coefficients were used to determine the correlation among functional, physicochemical, nutritional and pasting properties of sweet potato flour. β-carotene content varied significantly between the two locations from 70.98 ± 0.8 μg/g (Tshiombo) to 86.09 ± 2.0 μg/g (Univen), among cultivars from 1.71 ± 0.0 μg/g (Mvuvhelo) to 201.50 ± 1.0 μg/g (Dagga) and among orange fleshed (Dagga, Bophelo and Impilo) flours from 28.38 ± 0.2 μg/g (Impilo) to 201.50 ± 1.0 μg/g (Dagga). There was a similar trend in the contents of α-carotene to that of β-carotene from the two locations, which ranged from 0.63 ± 0.0 mol/L (Tshiombo) to 1.01 ± 0.0 mol/L (Univen). Mvuvhelo had significantly the lowest α-carotene content (0.50 ± 0.0 mol/L) and Impilo the highest (1.28 ± 0.0 mol/L). The total carotenoids was highest for Impilo (7.56 μg/g) and lowest for Mvuvhelo (1.33 ± 0.1 μg/g) but did not vary significantly (P > 0.05) between ii the locations. The antioxidant activity, based on 2, 2-diphenyl-1picrylhydrazyl (DPPH) free radical scavenging activity, was significantly highest in Bophelo (63.37 ± 0.8 mMAAE ml-1) and lowest in Dagga (26.93 ± 1.4 mMAAE ml-1) flours. The ferric reducing antioxidant power (FRAP) varied significantly across the locations and among the cultivars and ranged from 14.45 ± 0.3 μMTE ml-1 (Tshiombo) to 17.40 ± 1.1 μMTE ml-1 (Univen). FRAP was significantly highest in Impilo (21.12 ± 2.1 μMTE ml-1) and lowest in Mvuvhelo (8.16 ± 2.0 μMTE ml-1). Total carotenoid content positively correlated with DPPH (0.486*), FRAP (0.830**), β-carotene (0.370*), and α-carotene (0.424*). The antioxidant content and the radical scavenging activity were significantly correlated (0.563**). Vitamin A content was significantly lowest (6.88 ± 0.38 μg/g retinol) in Dagga flour and highest (7.97 ± 0.25 μg/g) in Impilo flour. Protein content varied significantly across the two locations and ranged from 4.23% (Tshiombo) to 7.16% (Univen). Dagga had significantly the lowest (3.47%) protein content while Impilo had the highest (7.53%). The fat content of the flours varied significantly between the two locations ranging from 0.63% (Tshiombo) to 1.01% (Univen). The protein content was positively correlated 0.594** and 0.421* to vitamin A and fat contents respectively. The Bophelo colour luminosity was significantly lower (L* 76.2) than the other two OFSP, Dagga (L* 83.51) and Impilo (L* 82.07). Bophelo a* (14.09) also differed significantly across all sweet potato cultivars. All cultivars differed significantly in b* values. Colour intensity (ΔE*) ranged from 15.87 to 38.48 for Mvuvhelo and Bophelo, respectively. Chroma ranged from 87.52 to 84.95 for Dagga and Mvuvhelo respectively. Total starch content was significantly different in all sweet potato cultivars and ranged from 244.07 μg/100 g (Bophelo) to 325.04 mg/g (Dagga). Resistant starch differed significantly in all sweet potato cultivars ranging from 1.21 μg/100 g dwb (Bophelo) to 7.07 μg/100 g dwb (Impilo). Ash content was significantly different in all cultivars and ranged from 3.17% (Dagga) to 3.79% (Bophelo). Water holding capacity (WHC) varied significantly across the two locations and ranged from 1.44 g H2O/g DM (Tshiombo) to 1.72 g H2O/g DM (Univen). Bophelo had significantly the lowest (1.27 g H2O/g DM) WHC and Impilo the highest (1.99 g H2O/g DM). The ash content negatively correlated to total starch (-0.928**) but positively iii correlated to WHC (0.654**). Peak viscosity differed significantly across all cultivars under study and ranged from 126.54 RVU (Bophelo) to 302.36 RVU. (Dagga). There was significant difference in trough viscosity across all cultivars ranging from 55.97 RVU (Impilo) to 280.78 RVU (Dagga). There were significant differences in the final viscosity across all cultivars ranging from 78.99 RVU (Impilo) to 319.26 (Dagga). Peak time viscosity varied significantly across all cultivars ranging from 3.87 min (Impilo) to 8.47 min. (Bophelo). Dagga cultivar had significantly the highest pasting temperature (94.16oC) and Bophelo the lowest (77.75oC). The setback viscosity was significantly highest 51.10 RVU (Mvuvhelo) and lowest 23.01 RVU (Impilo). All cultivars from the two locations consistently showed high potassium content ranging from 0.46% (Impilo) to 1.38% (Dagga) as compared to other minerals such as magnesium, calcium and chlorine which ranged from 0.16% (Impilo) to 0.34%. (Dagga). The CT scans revealed that there was a possibility of evaluating the effect of location on the density of granules of sweet potato flour and also the inherent differences in granular distribution of various sweet potato cultivars. SEM revealed high amounts of potassium, magnesium and chlorine. A profile of physicochemical and functional properties of flour of some of the OFSP cultivars produced in Limpopo province, South Africa has been drawn. This study also highlights the nutritional quality of the flour from four sweet potato cultivars and provides a ranking of flour to help the producers in the selection process. Bophelo flour was ranked the highest in terms of β- and, α-carotenes, total carotenoids and antioxidant capacity while Impilo was ranked highest in terms of functional properties and ash content. This study has highlighted significant differences in a number of parameters measured among the sweet potato cultivars. Therefore, in order to derive the maximum benefit from a given cultivar careful selection of sweet potato cultivars would be necessary.