Submitted by Maria Beatriz Vieira (mbeatriz.vieira@gmail.com) on 2017-03-28T13:22:07Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dissertacao_igor_tonin.pdf: 373470 bytes, checksum: a238602334cacca2e05e75ae1da2e45a (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:37:40Z (GMT) No. of bitstreams: 2 dissertacao_igor_tonin.pdf: 373470 bytes, checksum: a238602334cacca2e05e75ae1da2e45a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:38:40Z (GMT) No. of bitstreams: 2 dissertacao_igor_tonin.pdf: 373470 bytes, checksum: a238602334cacca2e05e75ae1da2e45a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-05T17:38:50Z (GMT). No. of bitstreams: 2 dissertacao_igor_tonin.pdf: 373470 bytes, checksum: a238602334cacca2e05e75ae1da2e45a (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015-09-08 / Sem bolsa / O trigo (Triticum aestivum L.) é uma cultura de destaque econômico e um dos cereais de inverno mais cultivados no sul do Brasil. Entretanto, suas sementes apresentam dormência, sendo um fator limitante em programas de melhoramento genético, quando se deseja rápida germinação pós-colheita, necessitando dessa forma, viabilizar tecnologias para potencializar a germinação. A pesquisa teve como objetivo avaliar a eficácia de doses de ácido giberélico na superação de dormência de sementes de trigo. As sementes de trigo da cultivar TBIO Toruk foram tratadas com inseticida Cropstar imidacloprid+thiodicarb 600 SC), fungicida Spectro (difenoconazol 150 SC) seguido de adição na calda do TS de GA3 nas respectivas dosagens. Os tratamentos empregados consistiram em doses de ácido giberélico, sendo: Pro-Gibb® (50 mg Kg-1 de GA3); Pro-Gibb® (100 mg Kg-1 de GA3); Pro-Gibb® (150 mg Kg-1 de GA3); Pro-Gibb® (200 mg Kg-1 de GA3); Pro-Gibb® (250 mg Kg-1 de GA3); Pro-Gibb® (300 mg Kg-1 de GA3) e testemunha (semente sem tratamento). Para avaliar a eficácia do GA3 as variáveis analisadas foram germinação, primeira contagem da germinação, velocidade de germinação, índice e coeficiente de velocidade de germinação. Os resultados obtidos permitem concluir que o ácido giberélico influenciou de forma positiva na superação da dormência de sementes de trigo, onde foi constatado maior porcentagem de germinação e vigor. A dose de ácido giberélico de 50 mg Kg-1, propiciou maior porcentagem de germinação (91 %), com incremento de 35 % na germinação de sementes de trigo quando comparado com sementes não tratadas. Por outro lado, constatou-se que doses de ácido giberélico, acima de 250 mg Kg-1, não são recomendadas para superação de dormência de sementes de trigo. / Wheat (Triticum aestivum L.) is a crop that has highlight of economic and one of the most important winter cereals grown in southern Brazil. However, the seeds present dormancy, limiting factor in breeding programs, considering that is necessary germination immediately after the harvest, requiring viable technologies to enhance germination. The research aimed to evaluate the effectiveness of gibberellic acid doses in overcoming wheat seed dormancy, It was used wheat seeds cultivar TBIO Toruk, Were treated with Cropstar insecticide (imidacloprid + thiodicarb 600 SC), Spectro fungicide (difenoconazole 150 SC) followed by the addition of the TS with GA3 in the dosis evaluated. The treatments consisted in the use of gibberellic acid doses, as follows: Pro-Gibb® (50 mg Kg-1 GA3); Pro-Gibb® (100 mg Kg-1 GA3); Pro- Gibb® (150 mg Kg-1 GA3); Pro-Gibb® (200 mg Kg-1 GA3); Pro-Gibb® (250 mg Kg-1 GA3); Pro-Gibb® (300 mg Kg-1 GA3) and Witness without treatment. To evaluate the effectiveness of GA3 it was analyzed the variables: germination, first germination count, germination rate, index and coefficient of germination speed. The obtained results allow us to conclude that gibberellic acid positively influenced the physiological quality of wheat seeds, where was found greater percentage of germination and vigor. A gibberellic acid dose of 50 mg Kg-1, show greater germination percentage (91 %), an increase of 35 % in wheat seeds germination when compared to untreated seeds. Gibberellic acid doses above 250 mg Kg-1, are not recommended for overcoming wheat seed dormancy.

Submitted by Maria Beatriz Vieira (mbeatriz.vieira@gmail.com) on 2017-03-29T12:34:17Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dissertacao_vitor_dante_poletto.pdf: 713579 bytes, checksum: bb3ca36d7dab11a50d2a6e2b9fa3c3df (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:41:22Z (GMT) No. of bitstreams: 2 dissertacao_vitor_dante_poletto.pdf: 713579 bytes, checksum: bb3ca36d7dab11a50d2a6e2b9fa3c3df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:42:23Z (GMT) No. of bitstreams: 2 dissertacao_vitor_dante_poletto.pdf: 713579 bytes, checksum: bb3ca36d7dab11a50d2a6e2b9fa3c3df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-05T17:42:34Z (GMT). No. of bitstreams: 2 dissertacao_vitor_dante_poletto.pdf: 713579 bytes, checksum: bb3ca36d7dab11a50d2a6e2b9fa3c3df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015-05-19 / Sem bolsa / A produção brasileira de trigo tem variado conforme o mercado interno e externo. Isso porque o mercado interno não supre o consumo total do país e por isso torna-se necessária a importação. Além de diferenciais como preço pago ao produtor, outra característica importante é a criação de cultivares para tornar a atividade viável economicamente. Essas cultivares devem ser produtivas e com bom peso hectolítrico. Diversas empresas testam e analisam os dados das cultivares para que a decisão do produtor se torne mais fácil na análise e decisão de cultivar. O objetivo do trabalho foi analisar sete cultivares plantadas nas três regiões tritícolas no estado do Paraná, conforme recomendação do Ministério da Agricultura, Pecuária e Abastecimento, a partir de dados fornecidos pela Fundação Pró-Sementes. As cultivares utilizadas foram: BRS GUAMIRIM, FPS NITRON, IAPAR 130, IAPAR 144, MARFIM, TBIO SELETO E TBIO TIBAGI. Foram analisados os dados de produtividade e peso hectolítrico em três anos safras (2012, 2013 e 2014). As cultivares de trigo apresentam produtividade muito semelhantes entre si, embora pertençam a diferentes obtentores; variações não significativas são observadas entre cultivares de acordo com o local de semeadura; a cultivar FPS Nitron apresenta alto peso hectolítrico, acima de 83 kg.hl-1, especialmente quanto cultivado em regiões baixas, de clima quente e moderadamente seco. / The Brazilian production of wheat has varied according to the domestic and foreign markets. This is because the internal market does not meet the total consumption of the country and therefore imports becomes necessary. In addition to advantages such as price paid to producers, another important feature is the creation of cultivars to make economically viable activity. These cultivars should be productive and good test weight. Several companies test and analyze the cultivars data to the producer's decision becomes easier when it is analyzing which to grow plant. The objective was to analyze 7 cultivars planted in the three regions of VCU's Parana state, as recommended by the Ministry of Agriculture, Livestock and Supply, from data provided by Pro-Seed Foundation. The cultivars were BRS Guamirim, FPS NITRON, IAPAR 130, IAPAR 144, IVORY, TBIO SELECT AND TBIO TIBAGI. Productivity data and test weight were analyzed in three years vintages (2012, 2013 and 2014). The wheat cultivars present productivity very similar to each other, although belonging to different breeders '; Non-significant variations are observed between cultivars according to the location of seeding; To cultivate high hectoliter weight presents Nitron FPS, up to 83 kg hl-1, especially as cultivated in low-lying regions, moderately dry and hot climate.

Submitted by Maria Beatriz Vieira (mbeatriz.vieira@gmail.com) on 2017-03-30T12:20:05Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dissertacao_mario_rodrigo_dos_santos.pdf: 790530 bytes, checksum: bd2d7bb01e725738a7a28ae386de9e58 (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T18:00:23Z (GMT) No. of bitstreams: 2 dissertacao_mario_rodrigo_dos_santos.pdf: 790530 bytes, checksum: bd2d7bb01e725738a7a28ae386de9e58 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T18:01:23Z (GMT) No. of bitstreams: 2 dissertacao_mario_rodrigo_dos_santos.pdf: 790530 bytes, checksum: bd2d7bb01e725738a7a28ae386de9e58 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-05T18:01:35Z (GMT). No. of bitstreams: 2 dissertacao_mario_rodrigo_dos_santos.pdf: 790530 bytes, checksum: bd2d7bb01e725738a7a28ae386de9e58 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015-08-25 / Sem bolsa / A presente pesquisa teve como objetivo avaliar a produção de sementes de soja e trigo da Cooperativa Agroindustrial (Coopavel) Realeza - PR, no período de 2008/09 a 2013/14. Coletou-se dados provenientes da unidade de beneficiamento os dados de área inscrita, área aprovada, recebimento no beneficiamento, rendimento e percentual de aprovação e a comercialização das sementes aprovadas. Do laboratório de análise de sementes, foram obtidas: média do percentual germinativo e pureza das sementes de cultivares comercializada. Os resultados mostram que a Coopavel - Cooperativa Agroindustrial, unidade de Realeza tem um percentual acima de 95% das áreas inscritas e aprovadas para semeadura das culturas da soja e trigo nas safras de 2008 a 2013. O rendimento no beneficiamento está dentro dos valores usuais para sementes de soja e trigo. O controle interno de qualidade da Coopavel aprovou na unidade de Realeza uma média de 80 e 95% de sementes de soja e trigo, respectivamente. A qualidade das sementes pode sofrer influência de vários fatores antes e durante a colheita, na secagem, no beneficiamento, armazenamento, transporte e semeadura. Considerando a área total de semeadura de soja na ultima safra que foi de aproximadamente 338.000 hectares, correspondemos a um potencial de 470,000 sacos de sementes, onde a Coopavel detém no mercado um valor estimado de 60%. A Coopavel foi responsável por 46,5% do mercado de venda de sementes de soja na safra 2013/14. / This research aimed to evaluate the production of soybean and wheat Agroindustry Cooperative (Coopavel) Realeza - PR in the period 2008/09 to 2013/14. Was derived from the processing unit entered the area of data, approved area, receiving the processing, yield and percentage of approval and the trade of approved seeds. The seed analysis laboratory was obtained: average germination percentage and purity of seed cultivars commerce. The results show that Coopavel - Cooperative Agro, Realeza unit has a percentage above 95% of the registered areas and approved for soybean and wheat crops in the 2008 to 2013. The improvement in yield is within the usual standards for soybeans and wheat. The internal quality control of Coopavel approved in Realeza an average of 80 and 95% soybean and wheat seeds, respectively. Seed quality can be influenced by several factors before and during harvesting, drying in the processing, storage, transport and sowing. Considering the total area of soybean planting in the last crop that was approximately 338.000 hectares, corresponded to a potential 470,000 bags of seeds, where Coopavel holds the market an estimated 60%. The Coopavel accounted for 46.5% of soybean seed sales market in the 2013/14 crop.

Doctor of Philosophy / Genetics Interdepartmental Program / Jesse A. Poland / A central question in modern biology is to understand the genotype-to-phenotype (G2P) link, that is, how the genetics of an organism results in specific characteristics. However, prediction of phenotypes from genotypes is a difficult problem due to the complex nature of genomes, the environment, and their interactions. While the recent advancements in genome sequencing technologies have provided almost unlimited access to high-density genetic markers, large-scale rapid and accurate phenotyping of complex plant traits remains a major bottleneck. Here, we demonstrate field-based complex trait assessment approaches using a commercially available light-weight Unmanned Aerial Systems (UAS). By deploying novel data acquisition and processing pipelines, we quantified lodging, ground cover, and crop growth rate of 1745 advanced spring wheat lines at multiple time-points over the course of three field seasons at three field sites in South Asia. High correlations of digital measures to visual estimates and superior broad-sense heritability demonstrate these approaches are amenable for reproducible assessment of complex plant traits in large breeding nurseries. Using these validated high-throughput measurements, we applied genome-wide association and prediction models to assess the underlying genetic architecture and genetic control. Our results suggest a diffuse genetic architecture for lodging and ground cover in wheat, but heritable genetic variation for prediction and selection in breeding programs. The logistic regression-derived parameters of dynamic plant height exhibited strong physiological linkages with several developmental and agronomic traits, suggesting the potential targets of selection and the associated tradeoffs. Taken together, our highly reproducible approaches provide a proof-of-concept application of UAS-based phenomics that is scalable to tens-of-thousands of plots in breeding and genetic studies as will be needed to understand the G2P and increase the rate of gain for complex traits in crop breeding.

L'adaptation locale résultant de pressions de sélection agissant sur des caractères héritables est une force majeure façonnant la diversité phénotypique des populations dans la nature. A l'heure actuelle, de nombreuses questions subsistent quant à l'impact de la sélection sur l'évolution des gènes impliqués dans l'architecture des caractères adaptatifs qui sont souvent des caractères complexes impliquant de nombreux gènes en interaction. L'objectif de cette thèse est d'identifier certains mécanismes génétiques mis en jeu lors de l'adaptation de populations expérimentales de blé tendre à différents contextes climatiques. Le caractère étudié est la précocité de floraison, caractère adaptatif majeur chez les plantes annuelles. Les populations expérimentales considérées dans cette étude ont une origine génétique commune et évoluent de façon indépendante depuis 1984 dans différents sites en France sans sélection humaine consciente ni migration, mais sous l'influence de la sélection naturelle et de la dérive. En se basant sur les connaissances des gènes impliqués dans la floraison chez le blé, l'évolution de polymorphismes nucléotidiques de différents gènes candidats a été suivie durant 12 générations (2, 7 et 12) dans 3 populations expérimentales (Vervins au Nord de la France, Le Moulon en région parisienne et Toulouse au Sud). Ces populations ont également été caractérisées pour la précocité et pour la diversité de locus microsatellites répartis sur l'ensemble du génome. La comparaison des niveaux de différenciation génétique inter population obtenue pour les trois types de diversité montre que la précocité est sélectionnée de façon divergente dès les premières générations. Cependant cette sélection ne se fait pas de façon directe et semble être le fait de la sélection agissant sur des caractères corrélés dans les différents environnements, tels que la hauteur ou le poids de grains. La sélection pour la précocité peut être mise en relation avec les caractéristiques climatiques des sites de culture, les populations du Nord fleurissant plus tardivement que la population du Sud. Cette évolution rapide du caractère s'accompagne de changements importants de fréquences alléliques pour des gènes majeurs de précocité, et la mise en place de combinaisons alléliques multi-locus spécifiques des différents contextes climatiques considérés. Cette évolution ne remet pas en cause la diversité existant à l'intérieure de chaque population puisque plusieurs combinaisons différentes sont favorisées dans les différentes populations. Ce travail de thèse ouvre des perspectives intéressantes quant au problème du maintien du potentiel adaptatif des espèces cultivées.

The sun is the primary source of all chemical energy on the planet. Starch granules have evolved as storage deposits for captured light energy. Many complex biological functions take place at the starch granule surface, including starch granule metabolism and defense. The starch granule-associated protein puroindoline is a known antimicrobial with unique functional and biological properties, attributed to the presence of a unique tryptophan-rich domain. To test puroindoline's tight association, puroindoline removed from the starch granule surface during water-washing was assessed. Washing more than eight times failed to further reduce puroindoline content of starch granules, suggesting a strong association of puroindoline with the starch granule surface. To identify the tryptophan-rich domain tightly associated with the starch granule surface, we used a combination of in situ tryptic digestion and mass spectrometry. We identified the tryptophan-rich domain of puroindoline directly bound to the starch granule surface of wheat. This is the first instance of the tryptophan-rich domain directly observed at the starch granule surface. In addition, using mass spectrometry, we determined that during development and maturation, wheat seeds appear to have resisted infection and lysed the pathogens where, upon desiccation, the molecular evidence remained fixed at the starch granule surface. Proteins with known antimicrobial activity were identified, as well as several proteins from the plant pathogens Agrobacterium tumefaciens, Pectobacterium carotovorum, Fusarium graminearum, Magnaporthe grisea, Xanthomonas axonopodis, and X. oryzae. Future characterization may reveal previously unknown host-pathogen interactions. Finally, we have demonstrated that puroindoline, when expressed in the seeds of transgenic corn, will localize and associate with the starch granule surface in a pattern similar to the puroindoline expression pattern observed in wheat. Surprisingly, puroindoline expression in transgenic corn is correlated with an increase in total seed oil content.

The sun is the primary source of all chemical energy on the planet. Starch granules have evolved as storage deposits for captured light energy. Many complex biological functions take place at the starch granule surface, including starch granule metabolism and defense. The starch granule-associated protein puroindoline is a known antimicrobial with unique functional and biological properties, attributed to the presence of a unique tryptophan-rich domain. To test puroindoline's tight association, puroindoline removed from the starch granule surface during water-washing was assessed. Washing more than eight times failed to further reduce puroindoline content of starch granules, suggesting a strong association of puroindoline with the starch granule surface. To identify the tryptophan-rich domain tightly associated with the starch granule surface, we used a combination of in situ tryptic digestion and mass spectrometry. We identified the tryptophan-rich domain of puroindoline directly bound to the starch granule surface of wheat. This is the first instance of the tryptophan-rich domain directly observed at the starch granule surface. In addition, using mass spectrometry, we determined that during development and maturation, wheat seeds appear to have resisted infection and lysed the pathogens where, upon desiccation, the molecular evidence remained fixed at the starch granule surface. Proteins with known antimicrobial activity were identified, as well as several proteins from the plant pathogens Agrobacterium tumefaciens, Pectobacterium carotovorum, Fusarium graminearum, Magnaporthe grisea, Xanthomonas axonopodis, and X. oryzae. Future characterization may reveal previously unknown host-pathogen interactions. Finally, we have demonstrated that puroindoline, when expressed in the seeds of transgenic corn, will localize and associate with the starch granule surface in a pattern similar to the puroindoline expression pattern observed in wheat. Surprisingly, puroindoline expression in transgenic corn is correlated with an increase in total seed oil content.

Molecular markers were used in an attempt to determine the phylogenetic relationships of hexaploid wheats within Triticum aestivum L. and to identify wheat cultivars. Random amplified polymorphic DNA (RAPD), restriction fragment length polymorphism (RFLP), gliadin protein and cytological analyses were used to assess phylogenetic relationships among five morphological groups of hexaploid wheat, namely, macha, common wheat, spelta, vavilovii and semi-wild wheat (SWW). RAPD and gliadin data were analysed using the NTSYS-pc computer program to generate Jaccard genetic similarity coefficients. Coefficients of genetic similarity in the cytological study were calculated based on the number of chiasmata in hybrids. Dendrograms were constructed based on these coefficients. The dendrogram based on RAPD analysis grouped 15 accessions into five distinct clusters which were in agreement with the morphology-based classification. The results indicated that common wheat was closely related to vavilovii. Spelta was less related to the common and vavilovii wheat cluster. SWW was distantly related to common wheat. Macha was the least related to the previous clusters. These results were consistent with those based on cytological analysis. The results of gliadin analysis were not completely consistent with those based on RAPD and cytological analyses. RFLP data showed that it was difficult to determine phylogenetic relationships among the five groups of hexaploid wheat based on variation in the intergenic spacer region of the 18-25S rRNA unit. Polymerase chain reaction analysis of the 5S rRNA unit and the internal transcribed spacer of the 18-25S rRNA unit did not show any polymorphism among and within the five groups of hexaploid wheat. Twelve mis-classified Triticum accessions were found in macha and vavilovii wheat collections and investigated using RAPD and cytological analyses. A dendrogram based on RAPD analysis classified the 12 accessions into either T. monococcum, T. turgidum spp. dicoccum or T. timopheevii. The results were in agreement with cytogenetic data and morphological observations. The genetic diversity of spelta and macha wheat was also investigated using RAPD analysis and the results were generally consistent with geographic origins. Macha wheat germplasm was found slightly more diverse than spelta wheat although macha has a restricted geographic origin. In addition, duplicate accessions of macha and spelta were identified based on RAPD analysis. In the study of wheat cultivar identification and pedigree assessment, 29 cultivars were investigated using RAPD analysis. Cultivar specific markers were found, and at least eight cultivars could be identified using these specific markers. Cultivar relationships based on genetic similarity values were consistent with knownpedigrees. The study demonstrated that RAPD analysis can be used for estimating the phylogenetic relationships among the five groups of hexaploid wheat, reclassifying misclassified wheat germplasm, surveying the genetic diversity of spelta and macha wheat and identifying common wheat cultivars and duplicated accessions in wheat germplasm collections.

Field studies were conducted in Ontario in 2009 and 2010 to determine the tolerance of winter wheat to herbicide-fungicide tank-mixtures, and the tolerance of winter wheat underseeded red clover to commonly used herbicides applied at three timings. Tank-mixtures including the fungicide tebuconazole caused injury at early and late timings, while mixtures including the herbicide bromoxynil/MCPA were most injurious when applied late in the season. Injury was transient with no yield reductions observed. MCPA/mecoprop/dicamba caused significant yield reductions when applied at normal and late timings, but did not reduce yield when applied early. The herbicides prosulfuron+bromoxynil and pyrasulfotole/bromoxynil were most injurious to underseeded red clover and reduced clover biomass regardless of application timing. Herbicides and herbicide-fungicide tank-mixtures applied early, during cold temperatures do not increase winter wheat or red clover sensitivity; the likelihood of injury is greatest when applications of these products occur late. / Grain Farmers of Ontario; Ontario Ministry of Agriculture, Food, and Rural Affairs; Agriculture Adaptation Council of Canada

Fusarium head blight (FHB), caused by Fusarium graminearum Schwabe [telomorph: Gibberella zeae Schwein.(Petch)], is recognized as one of the most destructive diseases of wheat (Triticum aestivum L. and T. durum L.) and barley (Hordeum vulgare L.) worldwide. Breeding for FHB resistance must be accompanied by selection for desirable agronomic traits. Donor parents with two FHB resistance quantitative trait loci (QTL) Fhb1 (chromosome 3BS) and QFhs.nau-2DL (chromosome 2DL) were crossed to four adapted SRW wheat lines to generate backcross and forward cross progeny. F2 individuals were genotyped and assigned to 4 different groups according to presence/ absence of one or both QTL. The effectiveness of these QTL in reducing FHB in F2 derived lines was assessed in a misted, inoculated scab nursery. Resistance alleles and the interaction among FHB resistance QTL have distinct behavior in different genetic backgrounds in wheat. Fhb1 showed an average disease reduction of 12%, however it did not result in significant improvement of FHB resistance in all populations. In general, for the four backgrounds studied, the QFhs.nau-2DL QTL as more effective reducing FHB (19% average reduction). The combination of Fhb1 and QFhs.nau-2DL is not necessary, but recommended and it improved resistance in all populations. Backcross derived (BC) progeny from four genetic backgrounds were planted in replicated plots (2011 and 2012) and in the scab nursery in 2012. Population 2 had its progeny characterized by 961 DArT markers distributed throughout the genome. Several high-quality polymorphic markers were identified and listed as good predictors of phenotypic traits like disease resistance, and improved agronomic and quality characteristics. Backcross and forward cross derived progenies were tested for FHB resistance and agronomic and baking quality performance for 4 different populations sharing the same donor parent for resistance QTL. The results confirmed that F2 populations were effective indicators of expression levels of QTL prior to extensive backcrossing. The QTL Fhb1 and QFhs.nau-2DL increased FHB resistance without detriments on agronomic and quality traits on wheat populations investigated. BC populations were assessed as breeding populations and established as being rewarding tools for derivation of inbred lines in a breeding program, being BC2 the most recommended from our results.