新疆高品质陆地棉纤维品质性状遗传分析研究

 以9-1696×CCRI 35配置单交组合及其衍生世代,利用该组合的P₁、P₂、F₁、F₂、B₁和B₂ 6世代群体的纤维品质性状，采用世代平均值法、主-多基因混合遗传模型分离分析法对该组合纤维长度、整齐度、比强度和伸长率4个纤维品质性状做遗传分析。结果表明：（1）4个纤维品质性状均以加性遗传为主，同时检测出显著的上位性效应。经模型适合性检验，纤维长度和伸长率两个纤维品质性状符合加性－显性－上位性遗传模型。比强度和整齐度性状符合加性－上位性遗传模型。（2）比强度和伸长率符合两对加性－显性－上位性主基因＋多基因混合遗传模型，其主基因遗传率分别为：比强度（47.80%）、伸长率（20.07%）。纤维长度和整齐度遗传受主基因和多基因共同控制。

Analysis on Fiber Quality Traits Inheritance of High Quality Upland Cotton in Xinjiang

Based on the data of field experiment of six generations (P₁、P₂、F₁、F₂、B₁、B₂) from the upland cotton cross (9-1696×CCRI 35), the inheritance of four traits of fiber quality were studied by the methods of generation means, major gene polygene mixed inheritance model.The major results are as follows: 1) The heredity of fiber quality traits were mostly additive, as well as epistasis. Through Chi-Square test, the traits of fiber length and elongation expressed additive dominant and epistatic effects, and the traits of strength and uniformity expressed additive and epistatic effects. 2) It was showed that strength and elongation adapted to two major genes plus polygene model, and the major genes express additive dominant and epistatic effects. The major-genes hereditability were 47.80% of strength, 20.07% of elongation. Fiber length and uniformity were controlled by both major-gene and polygene.