摘要
Grain size is one of the critical agronomic traits governing grain yield and quality in rice.However,the underlying genetic mechanisms that control grain size in rice are poorly understood.We used an introgression line derived from Zhonghui 8015 and Oryza rufipogon Griff.This introgression line was evaluated under two different environmental conditions to dissect the quantitative trait loci controlling grain size.Genome-wide association study(GWAS)was performed using 28193 SNPs through a general linear model,and 56 significant SNPs on different loci associated with the 4 grain size traits were detected.Cloned genes including GS3 and q GL3 showed substantial effects on grain length and size.Seven new stable loci were identified with pleiotropic effects on grain size.Haplotype,gene expression analyses,combined gene-based associations,and functional annotations permitted the shortlisting of important dominant genes including GS3 and q GL3.
基金
supported by the National Key Research and Development Program(Grant No.2016YFD0101801)
the Major Project of the Genetically Modified and National Key Transgenic Research Projects,China(Grant No.2016ZX08001-002)
the National Natural Science Foundation of China(Grant No.31521064)
Chinese Academy of Agricultural Sciences Innovation Project(CAASASTIP-2013-CNRRI)
Fundamental Research Expenses of Central Public Welfare Research Institutions 2017 RG001-1.
