GL9 from Oryza glumaepatula controls grain size and chalkiness in rice  

作　　者：Shaojun Lin Zupei Liu Kui Zhang Weifeng Yang Penglin Zhan Quanya Tan Yajun Gou Shuaipeng Ma Xin Luan Chubing Huang Zhili Xiao Yuanyuan Liu Bihuang Zhu Ruiqing Liang Wenqi Zhou Haitao Zhu Suhong Bu Guifu Liu Guiquan Zhang Shaokui Wang 

机构地区：[1]Guangdong Provincial Key Laboratory of Plant Molecular Breeding,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,South China Agricultural University,Guangzhou 510642,Guangdong,China [2]Guangdong Laboratory for Lingnan Modern Agriculture,Guangzhou 510630,Guangdong,China

出　　处：《The Crop Journal》2023年第1期198-207,共10页作物学报（英文版）

基　　金：supported by the major science and technology research projects of Guangdong Laboratory for Lingnan Modern Agriculture(NT2021001);the Key Projects of Basic Research and Applied Basic Research of Guangdong Province(2019B030302006);the National Natural Science Foundation of China(32072040,31622041);the National Innovation and Entrepreneurship Training Program for College Students(202110564045)。

摘　　要：Grain size is a key factor influencing grain yield and appearance quality in rice.We identified twelve quantitative trait loci(QTL)for grain length(GL),nine for grain width(GW),and nine for 1000-kernel weight(TKW)using GLU-SSSLs,which are single-segment substitution lines with Oryza glumaepatula as donor parent and Huajingxian 74(HJX74)as recipient parent.Among the QTL,qGL1-2,qGL1-4,qGL9-2,qGW2-2,qGW9-1 and qTKW9-2 contributed to high grain yield.GL9 was identified as a candidate gene for qGL9-2 by map-based cloning and sequencing,and is a novel allele of GS9.The kernel of NIL-gl9was slenderer and longer than that of HJX74,and the TKW and grain yield per plant of NIL-gl9 were higher than those of HJX74.The proportion of grain chalkiness of NIL-gl9 was much lower than that of HJX74.Thus,gl9 increased grain yield and appearance quality simultaneously.Three pyramid lines,NIL-gs3/gl9,NIL-GW7/gl9 and NIL-gw8/gl9,were developed and the kernel of each was longer than that of the corresponding recipient parent lines.The gl9 allele may be beneficial for breeding rice varieties with high grain yield and good appearance quality.

关 键 词：Oryza glumaepatula GL9 Grain size Grain chalkiness Single-segment substitution line 

分 类 号：S511[农业科学—作物学]