Genetic study and QTLs mapping in soybean populations from food type x type grain topcross

• Grant number: 15/00407-9
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): May 01, 2015
• Effective date (End): December 31, 2017
• Field of knowledge: Agronomical Sciences - Agronomy
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Sandra Helena Unêda-Trevisoli
• Grantee: Cleber Vinicius Giaretta Azevedo
• Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

To accord the needs of a new food type soybean cultivars patients with resistance to soybean cyst nematode (SCN) race 3, this work aims the advancement of two soybean populations progenies derived from topcrosses between genotypes type food type x grain. These populations are found in the F3 generation and will be advanced to the generation F6 with selecting superior genotypes. The evaluated data are: plant height at maturity (APM), first pod height (AIV), lodging (Ac), agronomic value (VA), number of pods per plant (NV), number of days to flowering (NDF), days to maturity (NDM), total number of seed pods formed (NV); 100 seed weight (PCS), grain yield (PG), tegument color (CT) and staining the heel (CH). Genetic parameters will be selected the upper and estimated progenies: additive genetic variance and dominance, genetic variance among progenies, genetic variance within progenies , broad sense heritability and restricted, for the average family and the estimated gain with the selection (GS) through the mixed model REML / BLUP. Moreover, there will be the mapping of QTLs associated with resistance to NCS (class 3) for these two populations, which were obtained from contrasting parents for resistance to NCS. From phenotypic data of genotypes in F2 and genotypic generated by SNPs markers will be held the construction of the genetic map link to the F2 population and subsequently identify associated QTLs with resistance to SCN. (AU)