抗黄矮病小麦种质的遗传分析  

Genetic analysis of resistance to barley yellow dwarf virus of wheat germplasms.

作　　者：曹亚萍[1] 张明义[1] 宁东贤[1] 范绍强[1] 

机构地区：[1]山西省农业科学院小麦研究所,临汾041000

出　　处：《中国生态农业学报》2007年第4期116-119,共4页Chinese Journal of Eco-Agriculture

基　　金：国家863计划(2003AA211010);山西省农业科学院科技攻关计划(YGG0301)资助

摘　　要：以抗黄矮病小麦种质为母本、丰产性品种为父本配制杂交组合,鉴定所有F1代及保留组合6个世代的抗病性,运用不完全双列杂交模式和加权最小二乘法分析抗病基因的遗传效应,根据Castle-Wright方法估计抗病种质的最小抗病基因数目。结果表明:抗黄矮病遗传不符合加性-显性模型,以加性效应为主,抗病基因间存在明显的互作效应,表现为加性×加性和加性×显性;黄矮病抗性遗传力较高,变幅为69.15%～97.75%;抗病种质"02R084"和"02R493"分别含有1对抗病基因,且在不同遗传背景中基因互作方式存在差异。Disease-resistance character of wheat germplasms was identified using 3 - 4 incomplete diallel model and weighted least square method in all F1 , and in six generation reserved combinations of 3 BYDV-resistance material females and 4 fertility variety males. The least gene number was estimated in the disease-resistance trait by Castle-Wright method. Results show that inheritance does not follow additive-dominant genetic model, while additive effects remain significant. Meanwhile significant interactions are found with additive × additive and additive × dominant. Heritability of BYDV resistance is high and within the range of 69.15 % -97.75 %. 02R084 and 02R493 are estimated to contain one resistance gene,and gene interactions vary with different genetic backgrounds.

关 键 词：冬小麦 大麦黄矮病毒 遗传效应 基因数目 

分 类 号：S512.1[农业科学—作物学]