玉米株高和穗位高遗传基础的QTL剖析

被引:51
作者
兰进好
褚栋
机构
[1] 中国农业科学院作物育种栽培研究所/农业部作物遗传育种重点实验室,山东省农业科学院高新技术研究中心北京,济南
关键词
玉米; 株高; 穗位高; QTL(Quantitative trait locus); 遗传基础;
D O I
10.16288/j.yczz.2005.06.015
中图分类号
S513 [玉米(玉蜀黍)];
学科分类号
摘要
利用玉米强优势组合(Mo17×黄早四)自交衍生的191个F2单株构建了由SSR和AFLP标记组成的分子连锁图谱。F2进一步自交产生的184个F2∶3家系用于调查株高和穗位高的表型值。采用基于混合线性模型的复合区间作图法和相应的作图软件QTLmapper/V2.0,分别定位了7个株高和6个穗位高QTL;检测到18对控制株高和13对控制穗位高的上位性效应位点;同时发现了与环境存在显著互作的6个株高和8个穗位高单位点标记区域以及4对株高和4对穗位高上位性效应区域。分析了各种遗传因素在株高和穗位高遗传基础中的相对作用大小,指出了加性、显性和上位性是玉米株高和穗位高的重要遗传基础。并对所定位的QTL的真实性、株高和穗位高的关系以及研究结果对分子育种的启示予以讨论。
引用
收藏
页码:69 / 78
页数:10
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