小麦抗旱品种的遗传多样性分析及株高优异等位变异挖掘

被引:38
作者
魏添梅 [1 ,2 ]
昌小平 [2 ]
闵东红 [1 ]
景蕊莲 [2 ]
机构
[1] 西北农林科技大学农学院
[2] 中国农业科学院作物科学研究所/国家农作物基因资源与基因改良重大科学工程/农业部作物种质资源利用重点开放实验室
基金
国家高技术研究发展计划(863计划);
关键词
遗传多样性; 等位变异; 株高; 关联分析; 小麦;
D O I
暂无
中图分类号
S512.1 [小麦];
学科分类号
0901 ;
摘要
为了解北方冬麦区小麦抗旱品种的遗传多样性,筛选株高相关标记的等位变异,选用117个均匀分布于小麦各条染色体的SSR标记,对136份小麦抗旱品种进行分析。共检测到1484个等位变异,平均每个标记12.6个等位变异,变化范围为2~42个,供试材料的多态性遗传信息含量(PIC)变化范围为0.016~0.941,平均为0.640。聚类分析把同一地区或育种单位育成的品种、具有共同亲本的姊妹品种聚为一类,部分相近年代选育的品种也分别聚在一类,国外材料的基因导入对育成品种的遗传基础产生了影响。关联分析表明,在旱地条件下与株高显著相关的标记有19个(P<0.01),其中6个极显著相关(P<0.001);在水地条件下与株高显著相关的标记也有19个,其中7个极显著相关。水、旱两种条件下共检测出与株高极显著相关的标记9个,分别是Xbarc125(7D)、Xbarc168(2D)、Xgwm126(5A)、Xgwm130(2B)、Xgwm212(5D)、Xgwm285(3B)、Xgwm495(4B)、Xgwm95(2A)和Xwmc396(7B),其中Xgwm285的220bp、Xgwm495的181bp、Xgwm212的99bp和Xbarc125的167bp等位变异是与矮秆关联的优异等位基因。
引用
收藏
页码:895 / 904
页数:10
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