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采用2个纤维品质表现高强的材料和黄河流域棉区的2个主栽抗虫品种配成2个组合,利用主基因与多基因混合遗传模型分析方法,对主要纤维品质性状进行5个世代联合分析。结果表明多数品质性状是由一个主基因和多基因控制。主基因遗传效应中,F2分离群体中,比强度的遗传效应最大,为14.36%和8.40%,其次是绒长性状,为9.51%和2.59%。F2:3中的主基因效应与F2接近。主基因显性效应很小,除纤维长度在一个组合中总显性效应(主基因显性效应+多基因显性效应)为较大正值外,其余三个性状在两个组合中均表现负值或接近于0,杂合状态下多数纤维品质性状表型值偏向中亲值或低亲值,分子标记研究也证明了这一点,所以棉花纤维品质性状单纯依靠表型选择效率低,需要依靠分子标记辅助育种对主栽品种进行品质改良。
Two high-fiber-quality materials and two main pest-resistant varieties in the Yellow River valley were used to make two combinations. Based on the mixed genetic model analysis of major genes and polygenes, five generations of major fiber quality traits were united analysis. The results show that most quality traits are controlled by one major gene and multiple genes. Among the genetic effects of major genes, the genetic effects of specific intensity were the largest among F2 segregating populations, accounting for 14.36% and 8.40%, followed by long-length traits of 9.51% and 2.59%, respectively. The major gene effect in F2: 3 is close to F2. The major gene dominant effect was very small. Except for the total dominant effect (main gene dominant effect + multi-gene dominant effect) of the fiber length in one combination was a larger positive value, the other three traits showed in both combinations Negative or close to 0, heterozygous state most of the fiber quality traits phenotypic value in the pro-value or low progeny, molecular marker studies have proved this point, so cotton fiber quality traits relying solely on phenotypic selection efficiency is low, the need Relying on molecular marker-assisted breeding to improve quality of main cultivars.