Genome‐wide association analyses reveal the genetic basis of combining ability in rice

• DOI: 10.1111/pbi.13134
• Publication Date: 2019-04-20T14:45:58Z
• Authors: Junxiao Chen; Hao Zhou; Weibo Xie; Duo Xia; Guanjun Gao; Qinglu Zhang; Gongwei Wang; Xingming Lian; Jinghua Xiao; Yuqing He
• Keywords: Genome-wide Association Study; Mating design; Genetic Association; Inbred strain

Combining ability is a measure for selecting elite parents and predicting hybrid performance in plant breeding. However, the genetic basis of combining remains unclear global view from diverse mating designs lacking. We developed North Carolina II (NCII) population 96 Oryza sativa four male sterile lines to identify greatest value rice production. Statistical analyses indicated that general (GCA) specific (SCA) contributed variously different agronomic traits. In genome-wide association study (GWAS) traits, GCA SCA, we identified 34 significant associations (P < 2.39 × 10-7 ). The superior alleles loci (Ghd8, GS3 qSSR4) accumulated parental with high explained 30.03% variance grain yield, indicating molecular breeding feasible. distinct distributions these QTLs differentiation subpopulations. GWAS SCA 12 more showed dominance on corresponding conclude accumulation an important contributor heterosis greatly our would accelerate identification inbred super hybrids.