大豆对斜纹夜蛾幼虫抗性遗传的发展表达过程  

Development and Expression Process of Inheritance of Resistance to Cottom Worm ( Prodenia litura ) in Soybeans

作　　者：詹秋文[1] 盖钧镒[1] 章元明[1] 孙祖东[1] 

机构地区：[1]南京农业大学大豆研究所,农业部国家大豆改良中心,江苏南京210095

出　　处：《Acta Genetica Sinica》2001年第10期956-963,共8页

基　　金：国家自然科学基金项目 ( 39970 5 1 3);国家重点基础研究项目 (G1 9980 1 0 2 0 6)~~

摘　　要：采用植物数量性状遗传体系分离分析方法 ,通过 4个感抗杂交组合研究了在网室人工接入斜纹夜蛾幼虫的条件下大豆抗斜纹夜蛾植株反应发育过程的遗传。不论P1 、P2 、F1 、F2 、F2∶3多世代联合分析或单个分离世代分析 ,结果均表明大豆对斜纹夜蛾幼虫的抗性为两对主基因 +多基因遗传模式。但在大豆生长发育的不同时期 ,随害虫数量的变化 ,其抗虫性遗传呈动态变化过程。在两对主基因充分表达日期 ,主基因的遗传率较高 ,达 70 .40 %～ 99.2 1 % ,环境影响较小 ;多基因遗传率较低 ,为 0 .0 0 %～ 2 2 .2 9%。Cotton worm [ Prodenia litura (Fabricius)]was one of the major leaf feeders for soybeans in Southern China. Resistance to leaf feeders has been recognized as one of the major breeding target traits in the National Soybean Breeding Program. This paper deals with the study of inheritance of resistance of soybeans to cotton worm [ Prodenia litura (Fabricius)]. P 1,P 2,F 1,F 2,F 2∶3 of four susceptible×resistant crosses, i.e. N21297×N1178-2-2,N21266×N23860,N119-1×N1178-2-2 and N21266×N3039,were used in the study. The materials were planted in net room under artificial infestation in 1996～1998. The data of defoliation percentage of successive development stages. during cotton worm damage period were obtained and collected for genetic analysis. The segregation analysis methods for major genes plus polygene mixed inheritance model developed by Gai et al . were used to identify the genetic system of resistance. The results from joint analyses of multiple segregating generations as well as from analyses of single F 2 or F 2∶3 generations of the four crosses showed a two major genes plus polygene mixed inheritance model at fully developed stages of resistance while one or two major genes with or without polygene were observed at other stages. Between the two major genes,the additive effect of one locus was from 1.56 to 9.89(%,defoliation),another from -3.79 to 3.75(%,defoliation). The heritability values of major genes were estimated as 70.40%～99.21%,greater than those of polygene which were only 0.00%～22.29%. Therefore, in the improvement of resistance to cotton worm,major gene resistance should be considered at first.

关 键 词：大豆 斜纹夜蛾 抗虫性遗传 多世代联合分离分析 表达 

分 类 号：S565.103.4[农业科学—作物学]