种子2025，Vol.44Issue(4)：9-16,8.DOI:10.16590/j.cnki.1001-4705.2025.04.009
基于水稻籽粒面积和直径性状的QTL定位及分析
QTL Mapping and Analysis Based on Grain Area and Diameter Traits in Rice
摘要
Abstract
To explore the QTL of grain area and diameter traits,based on the recombinant self-bred families derived from the V20B/CPSLO17 genetic background and the high-density genetic linkage map,the QTL detection of grain area and diameter traits and the analysis of their genetic effects were conducted for two consecutive years.The results showed that a total of 9 QTLs of grain area and 9 QTLs of grain diameter were detected in two years.The LOD values of the 9 grain areas ranged from 2.56 to 6.25,and the variation range of phenotypic contribution rate was 5.861 4％to 16.077 8％.The LOD values of the 9 grain diameters ranged from 2.62 to 6.39,and the variation range of phenotypic contribution rate was 6.012 7％to 15.985 8％.The positioning intervals of the 9 grain area QTLs were exactly the same as those of the 9 grain diameter QTLs.The phenotypic contribution rates of the four QTLs(qGA5-1/qGD5-1,qGA5-2/qGD5-2,qGA8-3/qGD8-3 and qGA8-2/qGD8-2)exceeded 10％.2 QTLs(qGA5-2/qGD5-2 and qGA2-1/qGD2-1)were repeatedly detected three times.There were only 6 candidate genes at the qGA51/qGD5-1 locus and only 2 candidate genes at the qGA8-1/qGD8-1 locus.关键词
水稻/籽粒大小/基因/QTL/连锁图谱Key words
Oryza sativa L./grain size/gene/QTL/linkage map分类
农业科技引用本文复制引用
彭强,李佳丽,张大双,徐海峰,吴娴,吴朝昕,朱速松..基于水稻籽粒面积和直径性状的QTL定位及分析[J].种子,2025,44(4):9-16,8.基金项目
贵州省基础研究(自然科学)项目"调控水稻籽粒大小的新基因的克隆研究"(黔科合基础-ZK[2023]一般178) （自然科学）
贵州省科技计划项目"贵州山区特色优质稻新品种选育"(黔科合支撑[2022]重点028) （黔科合支撑[2022]重点028）
