QTL mapping of grain appearance quality traits and grain weight using a recombinant inbred population in rice (Oryza sativa L.)
文献类型： 外文期刊
作者： Gao Fang-yuan 1 ; Zeng Li-hua 2 ; Qiu Ling 1 ; Lu Xian-jun 1 ; Ren Juan-sheng 1 ; Wu Xian-ting 1 ; Su Xiang-wen 1 ; Gao Y 1 ;
作者机构： 1.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China
2.Sichuan Normal Univ, Chengdu 610110, Peoples R China
3.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China
关键词： QTL;appearance quality;1000-grain weight;recombination inbred lines (RIL);rice
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2016 年 15 卷 8 期
页码：
收录情况： SCI
摘要： Grain appearance quality traits, measured as grain length (GL), grain width (GW), length to width ratio (LWR), grain thickness (GT) and the percentage of grain with chalkiness (PGWC), as well as 1000-grain weight (TGW), are very important factors that contribute to rice grain quality and yield. To detect quantitative trait loci (QTLs) affecting these traits, we developed a set of recombinant inbred lines (RILs) derived from Gang46B (G46B) and K1075, a G46B introgression line with lower PGWC. Based on a linkage map containing 33 simple sequence repeat (SSR) markers, a total of 15 additive QTLs governing six measured traits were identified on 4 chromosomes across two environments. Of these, the five major QTLs which controlled GW, LWR, GT, PGWC, and TGW, each explaining up to 44.30, 55.29, 62.30, 30.94, and 28.78% of the variation, respectively, were found in the same interval of RM18004-RM18068 on chromosome 5. The G46B alleles contributed to the increase in GW, GT and PGWC at all loci, as well as the increase in TGW at its major QTL locus. Significant interactions between additive QTL and the environment were found at most loci, in which the largest, accounting for 15.06% of variation, was observed between gPGWC-5 and the environment. A total of 15 epistasis QTLs were detected for all the traits, and GL, GW and PGWC had significant epistasis QTLs based on environment interactions with minor effects. These results are valuable for future map-based cloning of the QTLs and the collaborative improvement of G46B in grain appearance quality and yield.
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