Genetic dissection of the relationships between grain yield components by genome-wide association mapping in a collection of tetraploid wheats.

ABSTRACT: Increasing grain yield potential in wheat has been a major target of most breeding programs. Genetic advance has been frequently hindered by negative correlations among yield components that have been often observed in segregant populations and germplasm collections. A tetraploid wheat collection was evaluated in seven environments and genotyped with a 90K SNP assay to identify major and stable quantitative trait loci (QTL) for grain yield per spike (GYS), kernel number per spike (KNS) and thousand-kernel weight (TKW), and to analyse the genetic relationships between the yield components at QTL level. The genome-wide association analysis detected eight, eleven and ten QTL for KNS, TKW and GYS, respectively, significant in at least three environments or two environments and the mean across

SUBMITTER: Mangini G 

PROVIDER: S-EPMC5764242 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature