Made available in DSpace on 2015-03-26T13:42:32Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1285006 bytes, checksum: 66befb25fdda54069e90bd93e5d2c031 (MD5) Previous issue date: 2014-07-10 / The corn crops occupies a prominent position in the agricultural activity in worldwide, being an of the most studied crops in the plant breeding, not so much for the case of corn starch. The corn starch Avati Morotî food is of greater importance for the Paraguayan peasant family and general public as source of typical food in several country regions. In most cases, the producers of this type of maize using seeds its own production of cultivars generally from low productivity, susceptible to disease, pests, and long cycle.Considering the importance of this type of corn for food security the Instituto Paraguayo de Técnologia Agraria (IPTA) is working in the plant breeding for to get early crops, being more productive and with low cost of ownership for small producers cultivars. The objective of this study was to evaluate the existence of interactions between genotypes and environments, and estimate the parameters of adaptability and stability of hybrids of corn starch by the method of Lin and Binns (1988); estimate genetic and phenotypic parameters as the simple correlations, partial and track, the genetic divergence and relative contribution of genetic diversity to characters by the method of Singh (1981) for 49 genotypes of corn starch in three environments in eastern Paraguay. The experimental design was a randomized block design with three replications, with plot containing 25 plants. The analysis of variance showed significant difference for all traits in the locality of Choré with 1% level of significance by F test for the location of Capitan Miranda; however, grain yield (GY) and plant aspect (AP) were not significant. The locality Yjhovy the (PG) was significant at 5%. The analysis of variance showed a significant interaction for genotype by environment at the 5% significance level for the F test, for all traits except male flowering. Most features of the showed interaction of complex type. The adaptability and stability proved more adaptable and stable hybrids, being also the most productive. The 41and 24 materials were genotypes that contained the lowest values of Pi general. In all locations, there was a significant genetic variability for all traits, including productivity the exception of the number of caterpillar (NL) and empty cobs (EV), the grain yield (GY) correlates positively with plant height and percentage of grains to the location of Choré and Yjhovy, lower positive correlation with GY were found with a diameter of cob (DE) and ear length (EC).Features percentage of grains (Pg) and ear length (EC) are those with the highest direct effect on PG between the primary components and secondary components were between plant height (APL) and prolificacy (PROL), the most indicated for indirect selection for grain yield. In all locations, there was a significant genetic variability among genotypes, with genotypes 48 the most divergent between them. From the dendrogram nearest neighbor two groups were formed for the localities Capitan Miranda and Choré, although for Yjhovy three groups were formed and the method of UPGMA were, three and four groups for the localities Capitan Miranda, Chore and Yjhovy, characters male flowering (FM) and plant height (APL) were the main contributors to genetic divergence. / A cultura de milho ocupa posição de destaque na atividade agropecuária no mundo, sendo umas das culturas mais estudadas na área de melhoramento genético, nem tanto assim para o caso de milho amiláceo. O milho amiláceo Avati Morotî constitui uns dos alimentos de maior importância para a população do Paraguai em especial à família camponesa do Paraguai e população em geral por ser parte constituinte de vários pratos típicos do país. Na maioria dos casos os produtores deste tipo de milho utilizam sementes de sua própria produção, geralmente provenientes de cultivares de baixa produtividade, suscetível à doenças e pragas e ciclo muito longo. Considerando as importâncias deste tipo de milho para a segurança alimentar, o IPTA (Instituto Paraguaio de Tecnologia Agrária) trabalha na área de melhoramento para obter cultivares precoces, mais produtivas de baixo custo de aquisição para os pequenos produtores. O objetivo deste trabalho foi avaliar a existência de interação entre genótipos e ambientes e estimar os parâmetros de adaptabilidade e estabilidade de híbridos de milho amiláceo pelo método de Lin e Binns (1988); estimar os parâmetros genéticos e fenotípicos, assim também as correlações simples, parciais e de trilha e estudar a divergência genética, assim também a contribuição relativa dos caracteres para diversidade genética pelo método de Singh (1981), para 49 genótipos de milho amiláceo, em três ambientes, na região Oriental do Paraguai. O delineamento experimental utilizado foi o de blocos ao acaso, com três repetições, com a parcela contendo 25 plantas. A análise de variância demonstrou diferenças significativas para todos os caracteres avaliados na localidade de Choré com nível de 1% de significância pelo teste F. No entanto, para a localidade de Capitan Miranda, a produtividade de grãos PG e aspecto da planta AP não foram significativos. A localidade Yjhovy o (PG) foi significativa aos 5%. A análise de variância conjunta mostrou uma interação significativa para híbridos por ambientes ao nível de 5 % de significância pelo teste F, para todos os caracteres, com exceção de floração masculina. A maioria das características apresentou interação do tipo complexa. A adaptabilidade e estabilidade revelaram híbridos mais adaptados e estáveis, sendo também, os mais produtivos. Os híbridos 41e 24 foram que contiveram os menores valores de Pi geral. Em todos os locais, observou-se a existência de variabilidade genética para todas as características entre eles a produtividade a exceção do número de lagarta e espiga vazia . A PG correlacionou-se positivamente com a altura de planta e porcentagem de grãos para a localidade de Choré e Yjhovy, menor correlação positiva com PG foi obtida com diâmetro de espiga DE e comprimento de espiga CE. Os caracteres porcentagem de grãos Pg e comprimento de espiga CE são os que apresentaram maior efeito direto sobre a PG entre os componentes primários, e entre os componentes secundários foram altura de planta APL e prolificidade PROL, sendo os mais indicados para seleção indireta para PG. Em todos os locais, observou-se a existência de variabilidade genética entre os híbridos, sendo o genótipo 48 o mais divergentes entre eles. A partir do dendrograma de Vizinho mais próximo foram formados dois grupos para as localidades de Capitan Miranda e Choré, embora para Yjhovy foram formados três grupos e pelo método de UPGMA foram dois, três e quatro grupos para as localidades de Capitan Miranda, Chore e Yjhovy. Os caracteres floração masculina FM e altura de planta APl foram os que mais contribuíram para a divergência genética.

Made available in DSpace on 2017-07-10T18:13:19Z (GMT). No. of bitstreams: 1 Luciana M Curty Machado.pdf: 1144944 bytes, checksum: ef7bbfda79792b701f520f5f33838f35 (MD5) Previous issue date: 2012-11-09 / The objectives were to evaluate the genetic parameters for the daily weight gain (GPD) of different families of Nile tilapia strain GIFT evaluated in fish farming at UEM/Codapar in Maringá and Sgarbi in Palotina, verify the occurrence of genotype-environment interaction and to compare the morphometric characteristics and performance of single sex populations of male tilapia strains GIFT® and Saint Peter reared in mixed system in Fish Culture Station of the Sgarbi, Paraná, Brazil. The cultivation was carried out during the period June to November 2011, totaling 160 days. The system used in the Fish Culture Station of the Sgarbi was a semi-intensive being adopted the density of 2.0 fish m-2. There were housed 480 fish of the GIFT strain and 1400 fish of the red hybrid, totaling 1880 animals, with an average weight of 15 g. The total GIFT population studied consisted of 720 fish, distributed in 19 families. There were used the complete pedigree information GIFT strain since its introduction in Brazil. For performance testing, two groups of fish previously identified with 240 and 480 specimens, were housed in fish farms ponds in Maringá and Palotina, respectively. The fish were distributed to have representatives of all families in both environments. After rearing period the fish assessed in Maringá and Palotina had a final weight average of 417 g and 280 g, respectively. The covariance components, genetic parameters and phenotypic were estimated proceeding to Bayesian inference, using the computer system MTGSAM. There were used the credibility interval (IC) at 5% probability to determine the differences of genetic parameters and variance components in the local culture. The additive genetic variance to the GPD showed values of 0.113 and 0.045 and the residual variance was 0.036 and 0.024, respectively for Maringá and Palotina. The phenotypic variance estimated for GPD in Maringá was higher than that Palotina. The heritability (h2) of the GPD in Maringá (h2 = 0.707) and Palotina (h2=0.575) were considered high with wide credibility intervals. The genetic correlations and phenotypic to the GPD in Maringá and Palotina had values of 0.20 and 0.13, respectively. The estimates of Spearman correlation, based on breeding values for the individual GPD (0.48) and GPD family (0.59) were significant. The estimates of the correlations of genetic parameters to GIFT strains indicate the presence of genotype-environment interaction. The daily weight gains of tilapia in local assessed are characterized as distinct, and may be influenced by different sets of genes. There were collected and individually assessed 190 and 102 tilapia males, respectively of the GIFT and Saint Peter® strains. The average final weight and daily weight gain among the three genetic groups of the GIFT strain showed no significant differences. However all groups of GIFT strain showed average values of performance and morphometric characteristics superior to hybrid strain Saint Peter®. There was a significant difference only for the height of the GIFT strain of tilapia group higher than the bottom. The morphometric characteristics and growth performance are superior to the GIFT strain, regardless of genetic group, compared to Saint Peter®, except for the head length/standard length of tilapia evaluated. / Objetivou-se estimar os parâmetros genéticos para característica de ganho em peso diário (GPD) de diferentes famílias de tilápia do Nilo da variedade GIFT nas pisciculturas UEM/Codapar em Maringá e Sgarbi em Palotina, verificar a ocorrência de interação genótipo-ambiente e comparar as características morfométricas e o desempenho em cultivo monossexo macho de tilápia das variedades GIFT e Saint Peter® cultivadas em sistema misto na Estação da Piscicultura Sgarbi, Paraná, Brasil. O cultivo foi conduzido durante o período de junho a novembro de 2011, totalizando 160 dias. Na piscicultura Sgarbi foi utilizado o sistema semi-intensivo, sendo adotada a densidade de 2,0 peixes m-2. Foram alojados 480 peixes da variedade GIFT e 1400 peixes da variedade vermelha híbrida, totalizando 1880 animais, com peso médio individual de 15 g. A população GIFT avaliada consistiu de 720 peixes, distribuída em 19 famílias. Foram utilizadas informações de pedigree completo, desde sua introdução no Brasil. Para o teste de desempenho, dois grupos de peixes previamente identificados, o primeiro com 240 e o segundo com 480 espécimes, foram alojados em viveiros nas pisciculturas UEM/Codapar e Sgarbi, respectivamente em Maringá e Palotina. Distribuíram-se os peixes para que tivessem representantes de todas as famílias nos dois ambientes. Ao final do período de cultivo, as tilápias GIFT avaliadas em Maringá e Palotina apresentaram peso médio final de 417 g e 280 g, respectivamente. Os componentes de covariância e os parâmetros genéticos e fenotípicos foram estimados procedendo-se a inferência bayesiana, por meio do sistema computacional MTGSAM. Utilizou-se o Intervalo de Credibilidade (IC), ao nível de 5% de probabilidade, para determinação das diferenças dos parâmetros genéticos e componentes de variância nos locais de cultivo. A variância genética aditiva para o GPD apresentou valores de 0,113 e 0,045 e a variância residual foi de 0,036 e 0,024, respectivamente para Maringá e Palotina. A variância fenotípica estimada para o GPD em Maringá foi superior à de Palotina. A herdabilidade (h2) do GPD em Maringá (h2 = 0,707) e para Palotina (h2 = 0,575) foram consideradas altas, com amplos intervalos de credibilidade. As correlações genética e fenotípica para GPD em Maringá e Palotina apresentaram valores de 0,20 e 0,13, respectivamente. As estimativas da correlação de Spearman, com base nos valores genéticos, para o GPD individual (0,48) e GPD das famílias (0,59) foram significativas. As estimativas das correlações dos parâmetros avaliados na variedade GIFT indicam presença da interação genótipo-ambiente. Os ganhos em peso diário das tilápias nos locais avaliados caracterizam-se como distintos, portanto podem ser influenciados por diferentes conjuntos de genes. Foram avaliados individualmente 190 e 102 tilápias machos, respectivamente, das variedades GIFT e Saint Peter® e os valores médios de peso final e ganho em peso diário entre os três grupos genéticos da variedade GIFT não apresentaram diferença significativas. Porém, todos os grupos da variedade GIFT apresentaram valores médios do desempenho e das características morfométricas superiores à variedade híbrida Saint Peter®. Houve diferença significativa apenas para a altura das tilápias da variedade GIFT do grupo superior em relação ao inferior. As características morfométricas e desempenho zootécnico são superiores para a variedade GIFT, independente do grupo genético, quando comparada à Saint Peter®, com exceção da relação comprimento da cabeça/comprimento padrão das tilápias avaliadas.

The broad objective of the study was to determine the economic value of local pigs in marketand subsistence-oriented production systems in communal areas of Southern Africa. Data were collected from 288 households to investigate farmer perceptions, effects on pig production and handling of disease outbreaks such as classical swine fever (CSF) in market- and subsistenceoriented production systems. The utilisation of local pigs in these market- and subsistenceoriented production systems in improving people‟s welfare was evaluated. Climate change was identified by farmers in these production systems as a major constraint to pig production hence an experiment was carried out in the hottest season to determine diurnal heat-related physiological and behavioural responses in Large White (LW) and South African local pigs. The same genotypes were used to determine effects of diurnal heat-related stress on their growth performance. Choice experiment was done to determine farmer preferences for local pig traits and implicit prices for these traits in CSF-affected and unaffected areas that were under subsistence- and market-oriented production systems. In this experiment, the importance of heat tolerance was assessed relative to other productive and climate change adaptation traits. Significantly more pigs were culled in the CSF-affected areas that were market-oriented (8.0 ± 1.76) than subsistence-oriented (4.1 ± 1.00) production system. The risk of parasites and disease challenges was high in subsistence-oriented production system and coastal areas. In both production systems, CSF was perceived as destructive since the culling of pigs affected pork availability and income generation. The high risk of disease outbreaks and threat of climate change caused farmers in subsistence-oriented production system to select local pigs for their adaptive traits while those in the market-oriented production system focused on productive imported pigs. Farmers (83 %) indicated that they wanted pig genotypes that were adapted to climate change effects such as hot conditions. Local pigs were found to have superior heat tolerance over LW pigs (P < 0.05) in terms of lower heart rate and skin surface temperature. Frequency per day and duration for behavioural heat loss activities such as wallowing, sleeping in a prostrate posture and sprawling in slurry were also lower (P < 0.05) for local than LW pigs. The superiority of heat tolerance of local over LW pigs was further confirmed by their uncompromised growth performance under high diurnal temperatures. The Pearson‟s product moment correlation coefficient between temperature and feed conversion ratio for LW pigs was strongly positive (r = 0.50; P < 0.001) unlike the weak and positive correlation for local pigs (r = 0.20; P < 0.05). There was a quadratic relationship between temperature and average daily gain (ADG) for both pig genotypes. The regression coefficients for ADG were higher (P < 0.001) for LW than local pigs. It was concluded that at high ambient temperatures, performance of local pigs was less compromised than for LW pigs. Although local pigs were found to be heat tolerant, results of choice experiment showed that this trait was not selected for relative to other traits. Keeping pigs that required bought-in feeds, fell sick often and produced low pork quality (eating quality based on farmer perceptions) negatively affected farmers‟ livelihoods more in subsistence- than market-oriented production system. Farmers in market-oriented production system derived more benefit from productive traits such as heavier slaughter weights and large litter size than subsistence-oriented farmers. Under the subsistence-oriented production system, farmers in CSF-affected areas placed high prices on adaptive traits than the unaffected areas. Subsistence-oriented farmers who were affected by CSF wanted a total compensation price of R10 944.00 (USD1563.43) for keeping a pig genotype with unfavourable traits when compared to R4235.00 (USD605.00) for their CSF-unaffected counterparts. Implicit prices for traits could not be determined for market-oriented production system. It was concluded that farmers in CSFaffected areas placed high economic values on pig traits than farmers from the CSF-unaffected areas. The findings suggest that adapted local pigs can be promoted in subsistence-oriented production systems while productive imported pigs and their crosses with local pigs can be kept in market-oriented production systems.

Tesis por compendio / [ES] El trabajo realizado en la presente tesis pretende contribuir a la puesta en valor de las variedades tradicionales valencianas de tomate. En primer lugar se aborda la caracterización de una colección de 69 entradas de variedades valencianas de tomate de ocho tipos varietales ('De Borseta', 'Cherry', 'Cor¿, 'De Penjar', 'Plana', 'De Pruna', 'Redona' y 'Valenciana') con 64 descriptores convencionales y 38 características del Tomato Analyzer. Se ha puesto de manifiesto que el uso de forma complementaria de la herramienta fenómica del Tomato Analyzer es una nueva estrategia para la caracterización y clasificación de las variedades locales de tomate, así como para la distinción entre tipos varietales relacionados. A pesar del uso generalizado de los descriptores estandarizados de tomate, hay poca información sobre los efectos ambientales sobre los valores de los descriptores y sobre su herencia. La evaluación de 12 entradas de tomate procedentes de siete tipos varietales en tres ambientes diferentes (cultivo convencional aire libre, cultivo ecológico aire libre e invernadero) mediante el uso de 36 descriptores, ha permitido establecer la influencia del sistema de cultivo sobre estos descriptores, encontrándose una amplia gama de variación, y demostrando su utilidad para describir los materiales de tomate, su diversidad y relaciones. Por otra parte, puede ser muy interesante asociar características saludables como un elevado contenido en vitaminas o sustancias antioxidantes beneficiosas para la salud. El análisis de 69 entradas locales valencianas de tomate procedentes de ocho tipos varietales para caracteres como contenido en distintos azúcares, ácidos y antioxidantes puso de manifiesto diferencias significativas entre los tipos varietales ensayados para la mayoría de las características. Los tipos varietales 'Cherry' y 'De Penjar' presentaban mayor materia seca, contenido de sólidos solubles, acidez titulable, índice de sabor, ß-caroteno, ácido ascórbico, fenólicos totales y actividad antioxidante que los otros grupos. Los resultados obtenidos serán útiles para la diferenciación, mejora y selección de variedades locales de tomate con propiedades organolépticas mejoradas. Los estudios de caracterización y tipificación de las variedades tradicionales de tomate son imprescindibles para detectar factores que dificultan su puesta en valor y fomento de la explotación comercial. En este sentido, dentro de esta tesis se han caracterizado 3 poblaciones de tomate 'Valenciana d'El Perelló'. La menor productividad de las selecciones ensayadas en comparación con el control comercial parece ser debida a una concentración de la producción en los 2-3 primeros ramilletes de la planta. En el programa de selección y mejora del tomate 'Valenciana d¿El Perelló' que se ha realizado se dispone de selecciones con una distribución de cuajado mucho más uniforme. Por otra parte, una forma muy interesante de potenciar su cultivo, es obtener variedades resistentes al ToMV, derivándose un conjunto de linajes de este tomate con el gen Tm22 que confiere resistencia al ToMV. En cuanto a la adaptación a las condiciones agroclimáticas locales de las variedades tradicionales, esta característica es fundamental de este tipo de variedades. Así, las plantas de tomate del tipo 'De Penjar', han sido cultivadas tradicionalmente en la región mediterránea. Estos materiales están adaptados a condiciones de campo abierto bajo condiciones de bajo consumo de recursos. Sin embargo, el cultivo bajo invernadero se está expandiendo debido al aumento de su demanda. La evaluación de 12 variedades (siete entradas tradicionales, tres selecciones y dos híbridos) del tipo 'De Penjar' en cultivo al aire libre y en cultivo bajo invernadero ha revelado un alto impacto del ambiente de cultivo sobre las propiedades morfológicas, agronómicas y químicas de variedades de tomate 'De Penjar'y sugiere la necesidad de desarrollar variedade / [CA] El treball realitzat en la present tesi pretén contribuir a la posada en valor de les varietats tradicionals valencianes de tomàquet. En primer lloc s'aborda la caracterització d'una col·lecció de 69 entrades de varietats valencianes de tomàquet de vuit tipus varietals ( 'De Borseta', 'Cherry', 'Cor',' De penjar ',' Plana ',' De Pruna ', 'Redona' i 'Valenciana') amb 64 descriptors convencionals i 38 característiques del Tomato Analyzer. S'ha posat de manifest que l'ús de forma complementària de l'eina fenómica del Tomato Analyzer és una nova estratègia per a la caracterització i classificació de les varietats locals de tomàquet, així com per la distinció entre tipus varietals relacionats. Malgrat l'ús generalitzat dels descriptors estandarditzats de tomàquet, hi ha poca informació sobre els efectes ambientals sobre els valors dels descriptors i sobre la seva herència. L'avaluació de 12 entrades de tomàquet procedents de set tipus varietals en tres ambients diferents (cultiu convencional aire lliure, cultiu ecològic aire lliure i hivernacle) mitjançant l'ús de 36 descriptors, ha permès establir la influència del sistema de cultiu sobre aquests descriptors, trobant una àmplia gamma de variació, i demostrant la seva utilitat per descriure els materials de tomàquet, la seva diversitat i relacions. D'altra banda, pot ser molt interessant associar característiques saludables com un elevat contingut en vitamines o substàncies antioxidants beneficioses per a la salut. L'anàlisi de 69 entrades locals valencianes de tomàquet procedents de vuit tipus varietals per a caràcters com a contingut en diferents sucres, àcids i antioxidants va posar de manifest diferències significatives entre els tipus varietals assajats per a la majoria de les característiques. Els tipus varietals 'Cherry' i 'De penjar' presentaven major matèria seca, contingut de sòlids solubles, acidesa, índex de gust, ß-carotè, àcid ascòrbic, fenòlics totals i activitat antioxidant que els altres grups. Els resultats obtinguts seran útils per a la diferenciació, millora i selecció de varietats locals de tomàquet amb propietats organolèptiques millorades. Els estudis de caracterització i tipificació de les varietats tradicionals de tomàquet són imprescindibles per detectar factors que en dificulten la posada en valor i foment de l'explotació comercial. En aquest sentit, dins d'aquesta tesi s'han caracteritzat març poblacions de tomàquet 'Valenciana d'El Perelló'. La menor productivitat de les seleccions assajades en comparació amb el control comercial sembla ser deguda a una concentració de la producció en els 2-3 primers ramells de la planta. En el programa de selecció i millora del tomàquet 'Valenciana d'El Perelló' que s'ha realitzat es disposa de seleccions amb una distribució de quallat molt més uniforme. D'altra banda, una forma molt interessant de potenciar el seu cultiu, és obtenir varietats resistents al ToMV, derivant un conjunt de llinatges d'aquest tomàquet amb el gen Tm22 que confereix resistència al ToMV. Pel que fa a l'adaptació a les condicions agroclimàtiques locals de les varietats tradicionals, aquesta característica és fonamental d'aquest tipus de varietats. Així, les plantes de tomàquet del tipus 'De penjar', han estat cultivades tradicionalment a la regió mediterrània. Aquests materials estan adaptats a condicions de camp obert sota condicions de baix consum de recursos. No obstant això, el cultiu sota hivernacle s'està expandint causa de l'augment de la seva demanda. L'avaluació de 12 varietats (set entrades tradicionals, 3 seleccions i dues híbrids) del tipus 'De penjar' en cultiu a l'aire lliure i en cultiu sota hivernacle ha revelat un alt impacte de l'ambient de cultiu sobre les propietats morfològiques, agronòmiques i químiques de varietats de tomàquet 'De Penjar'y suggereix la necessitat de desenvolupar varietats específiques adaptades a cultiu baix hivernacle / [EN] The work carried out in this thesis aims to contribute to the valorisation of the traditional Valencian tomato varieties. First, the characterization of a collection of 69 entries of Valencian tomato varieties of eight varietal types ('De Borseta', 'Cherry', 'Cor',' De Penjar ',' Plana ',' De Pruna ', 'Redona' and 'Valenciana') with 64 conventional descriptors and 38 characteristics of the Tomato Analyzer. It has been shown that the complementary use of the Tomato Analyzer's phenomic tool is a new strategy for the characterization and classification of local tomato varieties, as well as for the distinction between related varietal types. Despite the widespread use of standardized tomato descriptors, there is little information about the environmental effects on the values of the descriptors and their inheritance. The evaluation of 12 entries of tomato from seven varietal types in three different environments (conventional open air cultivation, open air ecological cultivation and greenhouse) through the use of 36 descriptors, has allowed to establish the influence of the cultivation system on these descriptors, being a wide range of variation, and demonstrating its usefulness to describe tomato materials, their diversity and relationships. On the other hand, it can be very interesting to associate healthy characteristics such as a high content of vitamins or antioxidant substances beneficial to health. The analysis of 69 Valencian local tomato entries from eight varietal types for characters as content in different sugars, acids and antioxidants revealed significant differences between the varietal types tested for most of the characteristics. The varietal types 'Cherry' and 'De Penjar' had higher dry matter, content of soluble solids, acidity, flavor index, ß-carotene, ascorbic acid, total phenolic and antioxidant activity than the other groups. The results obtained will be useful for the differentiation, improvement and selection of local tomato varieties with improved organoleptic properties. Characterization and typification studies of traditional tomato varieties are essential to detect factors that make it difficult to value and promote commercial exploitation. In this sense, within this thesis 3 populations of tomato 'Valenciana d'El Perelló' have been characterized. The lower productivity of the selections tested compared to the commercial control seems to be due to a concentration of the production in the first 2-3 bunches of the plant. In the program of selection and improvement of the tomato 'Valenciana d'El Perelló' that has been made, selections are available with a much more uniform fruit set distribution. On the other hand, a very interesting way to enhance their crop is to obtain varieties resistant to ToMV, deriving a set of lineages of this tomato with the Tm22 gene that confers resistance to ToMV. Regarding the adaptation to the local agroclimatic conditions of the traditional varieties, this characteristic is fundamental of this type of varieties. Thus, tomato plants of the 'De Penjar' type have traditionally been grown in the Mediterranean region. These materials are adapted to open field conditions under conditions of low resource consumption. However, greenhouse cultivation is expanding due to the increase in demand. The evaluation of 12 varieties (seven traditional entrances, three selections and two hybrids) of the 'De Penjar' type in outdoor cultivation and in greenhouse cultivation has revealed a high impact of the cultivation environment on the morphological, agronomic and chemical properties of varieties of tomato 'De Penjar' and suggests the need to develop specific varieties adapted to greenhouse cultivation. / Figás Moreno, MDR. (2019). CARACTERIZACIÓN, TIPIFICACIÓN, SELECCIÓN Y MEJORA GENÉTICA DE VARIEDADES VALENCIANAS DE TOMATE [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/119449 / Compendio