小麦品种太空6号和中育6号对禾谷孢囊线虫Ha43致病型的抗性遗传分析  

Genetic analysis of resistance to Ha43 of Heterodera avenae in wheat cultivars Taikong No.6 and Zhongyu No.6

作　　者：石颖斐 胡艳峰[1] 代君丽[1] 李洪连[1] 

机构地区：[1]河南农业大学植物保护学院,河南郑州450002

出　　处：《河南农业大学学报》2015年第1期68-73,共6页Journal of Henan Agricultural University

基　　金：国家自然科学基金项目(30971899);国家公益性(农业)科研专项(200903040-4);国家高技术研究发展计划(863计划)(2012AA101105)

摘　　要：分别构建了感病亲本温麦19同太空6号和中育6号的杂交组合F2代分离群体。禾谷孢囊线虫(Cereal cyst nematode,CCN)须水群体的致病型为一种新致病型Ha43,为了明确太空6号和中育6号对Ha43致病型的抗性遗传特点,采用主基因+多基因混合遗传模型(mixed major gene plus poly-gene inheritance model)分析法,分析了温麦19×太空6号和温麦19×中育6号杂交组合F2代群体的抗性分离情况。结果表明,太空6号和中育6号对Ha43的抗性遗传效应均表现为数量性状遗传。太空6号对Ha43的抗性遗传效应符合B-1模型,推测太空6号对CCN的抗性由2对主基因+多基因控制,主基因表现为加性-显性-上位性效应,抗性主基因遗传率为95.40%。中育6号对Ha43的抗性遗传效应符合B-2模型,推测中育6号对CCN的抗性由2对主基因+多基因控制,主基因表现为加性-显性效应,抗性主基因遗传率为90.31%。In this research, Taikong No. 6 and Zhongyu No. 6 were crossed with the susceptible culti- var Wenmai 19 to produce F2 segregating population, respectively. The Xushui population of Hetero- dera avenae had been identified as a new pathotype Ha43. In order to confirm the genetic characteris- tics of resistance to CCN in wheat cuhivars Taikong No. 6 and Zhongyu No. 6, segregation characters of resistance among F2 progeny of crosses of Wenmai 19 × Taikong No. 6 and Wenmai 19 × Zhongyu No. 6 were analyzed. The method of mixed major gene plus poly-gene inheritance model was used to analyze the inheritance of resistance to Ha43. The results showed that the genetic model B-1 was most fitted for the resistance for the cross of Wenmai 19 × Taikong No. 6, which indicated that the resistance to cereal cyst nematode in Taikong No. 6 was controlled by two major genes with additive-dominant-epistasis effects plus polygene effect. The major gene heritability of resistance for the cross of Wenmai 19 × Taikong No. 6 to CCN in the field was 95.40%. The genetic model B-2 was most fitted for the resist- ance for the cross of Wenmai 19 × Zhongyu No. 6, which indicated that the resistance to cereal cystnematode in Zhongyu No. 6 was controlled by two major genes with additive-dominant effects plus poly- gene effect. The major gene heritability of resistance for the cross of Wenmai 19 × Zhongyu No. 6 to CCN in the field was 90.31%.

关 键 词：太空6号 中育6号 禾谷孢囊线虫 Ha43须水群体 抗性遗传 

分 类 号：S435[农业科学—农业昆虫与害虫防治]