QTL Detection for Rice Grain Shape Using Chromosome Single Segment Substitution Lines

Rice grain shape is one of the important factors affecting grain quality and yield, but it is liable to be influenced by genetic backgrounds and environments. The chromosome single segment substitution lines (SSSLs) in rice have been considered as ideal populations to identify the quantitative trait loci (QTLs). In this study, 22 QTLs affecting rice grain shape were detected to be distributed on eight chromosomes except chromosomes 6, 9, 11 and 12 by using SSSLs. Among them, seven QTLs conditioned grain length, six conditioned grain width, five affected grain length-width ratio and four controlled grain thickness.