Scanning QTLs for Grain Shape using Two Sets of Introgression Lines in Rice
文献类型: 外文期刊
第一作者: Qiu, Xianjin
作者: Qiu, Xianjin;Du, Bin;Hu, Hui;Ou, Xiaoxue;Lv, Wenkai;Yang, Longwei;Xing, Danying;Xu, Junying;Li, Zhixin;Zhang, Yunbo;Wang, Xiaoyan;Xu, Jianlong;Xu, Jianlong;Zheng, Tianqing;Qiu, Xianjin
作者机构:
关键词: Rice;Introgression lines;Grain shape;Quantitative trait locus;Genetic background
期刊名称:INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY ( 影响因子:0.822; 五年影响因子:0.906 )
ISSN: 1560-8530
年卷期: 2017 年 19 卷 3 期
页码:
收录情况: SCI
摘要: Grain shape determines both appearance quality and grain yield. In this study, two sets of introgression line populations derived from three parents were used to dissect the genetic basis of grain shape and illustrate the genetic background effects on QTL expression. Among the three parents, IR75862 was the common donor parent, and Ce258 and Zhongguangxiangl were two recipient parents. The two introgression line populations were evaluated for grain shape traits in the summer of 2012 at Jingzhou, China. A total of 23 QTLs were detected in all 12 chromosomes except chromosome 1, 3 and 9 for grain length, grain width, grain thickness and length to width ratio, 11 and 12 detected in Ce258 and Zhongguangxiangl background, respectively. They explained 6.95-38.27% of phenotypic variation. Among these QTLs, only three (26%) named qGL8, qLWR5 and qLWR10 stably expressed in both genetic backgrounds, clearly indicating that genetic background had large effects on QTL expression for grain shape. IR75862 alleles at these QTLs decreased GL and LWR in both backgrounds. Our findings will facilitate the gene cloning and breeding application for improvement of grain yield and quality in future. (C) 2017 Friends Science Publishers
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