玉米籽粒产量与产量构成因子的关系及条件QTL分析

被引:29
作者
彭勃 [1 ]
王阳 [1 ]
李永祥 [1 ]
刘成 [2 ]
张岩 [1 ]
刘志斋 [1 ,3 ]
谭巍巍 [1 ]
王迪 [1 ]
孙宝成 [2 ]
石云素 [1 ]
宋燕春 [1 ]
王天宇 [1 ]
黎裕 [1 ]
机构
[1] 中国农业科学院作物科学研究所
[2] 新疆农业科学院粮食作物研究所
[3] 西南大学农学院
基金
国家自然科学基金重点项目;
关键词
玉米; 产量; 产量构成因子; 条件QTL分析;
D O I
暂无
中图分类号
S513 [玉米(玉蜀黍)];
学科分类号
摘要
以我国玉米育种的骨干亲本齐319和黄早四构建的230个F2:3家系群体为材料,通过条件分析结合QTL定位方法探讨了单株产量(GYPP)与单株粒数(KNPP)和百粒重(KWEI)的遗传关系。结果表明,百粒重比单株粒数和单株产量遗传力高,受环境影响小。相关分析表明,单株粒数和百粒重与单株产量均呈现显著正相关,单株粒数与单株产量的相关系数更高。单株产量非条件QTL分析共定位到5个遗传主效应QTL和5对上位性位点,其中4个是控制3个性状(单株产量、单株粒数和百粒重)的一因多效性位点,1个是控制2个性状(单株产量和单株粒数)的一因多效性位点,全部5对上位性位点都与单株粒数和百粒重有关。条件QTL分析还检测到14个QTL位点及10对上位性位点,这些位点在非条件QTL分析中未被检测到,其效应较小。因此,单株粒数和百粒重与单株产量密切相关,通过改良单株粒数和百粒重可有效提高产量;条件QTL分析方法在单个QTL水平上证实了单株产量与单株粒数、百粒重较强的遗传相关性,并且能够检测到更多效应较小的QTL;发掘的两个效应较大的一因多效位点可为玉米高产分子育种和进一步精细定位提供理论参考。
引用
收藏
页码:1624 / 1633
页数:10
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