QTL Analysis of Rice Grain Size Using Segregating Populations Derived from the Large Grain Line

Grain size affects the yield and quality of rice. The large grain line (LGL), showing a japonica-like genome, was selected in breeding field. 94 F2 plants derived from cross between LGL Hanareum (a high-yielding tongil-type variety) were used for quantitative trait loci (QTL) analysis length (GL), width (GW), thickness (GT). A linkage map population, covering 1312 cM all 12 chromosomes, constructed using 123 Fluidigm SNP markers. total nine QTLs three traits detected on chromosomes two, three, four, six, seven. Two GL two six explained 17.3% 16.2% phenotypic variation, respectively. identified GW 24.3% 23.5% five GT five, seven, 13.2%, 14.5%, 16.6%, 10.9%, 10.2% novel QTL GT, qGT2, validated same region chromosome F3 population. this study, LGL, could be applied to development large-grain rice varieties.