【摘要】 以感病品种861为父本、抗病品种中植棉2号为母本配制杂交组合,构建6个世代群体（P₁、P₂、F₁、B₁、B₂和F₂）,并在田间病圃进行抗病性鉴定,利用主基因￣多基因混合遗传模型的多世代联合分析法研究陆地棉抗黄萎病遗传特性。结果表明,中植棉2号抗性遗传符合E-1遗传模型,即2对加性￣显性￣上位性主基因+加性￣显性多基因遗传模型。2对主基因遗传以显性效应为主,且第2对主基因的显性效应比第1对主基因的显性效应大,多基因遗传以加性效应为主。B₁、B₂和F₂的主基因遗传率分别为68.24%、30.71%和82.09%,多基因遗传率分别为0、24.96%和0,环境方差占总表型方差的17.01%⁴4.33%。更多还原

【Abstract】 Six populations（P₁, P₂, F₁, B₁, B₂, and F₂） derived from the cross of Zhongzhimian 2（resistant cultivar）×861（susceptible cultivar） were constructed to analyze the inheritance of Verticillium wilt resistance from an upland cotton cultivar Zhongzhimian 2 using the major gene plus polygene model. The level of disease resistance in each of the six populations was determined in the Verticillium wilt nursery. The results showed that Zhongzhimian 2 fitted two additive-dominance-epistasis major gene plus additive-dominance polygenes modes（E-1）. The heritability of major genes in B₁, B₂, and F₂ was estimated to be68.24%, 30.71%, and 82.09%, respectively, and the polygene heritability 0, 24.96%, and 0. The ratios of environmental variance to phenotype variance ranged from 17.01% to 44.33%.更多还原