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利用主基因与多基因混合遗传模型的P1、P2、F1、F2四世代联合分析方法,研究了棉花纤维细度相关性状的遗传,进一步明确了主基因存在的普遍性。同时,对麦克隆值密切相关的纤维线密度及成熟度比率进行了F2、F2:3家系的主基因-多基因单世代分析,初步判定线密度也存在一对主基因。性状间的遗传相关分析表明,麦克隆值及成熟度比率与整齐度分别呈极显著正相关和不相关,该两个性状与其它性状的相关性两个世代表现不一致;线密度与整齐度呈正相关,与伸长率呈极显著负相关,与长度、强度及衣分不相关。线密度与各性状的相关性要比麦克隆值和成熟度比率稳定,受环境影响小,有必要加强线密度的选择及深入研究。
Based on the four generations of P1, P2, F1 and F2 combined genetic model of major genes and polygenes, the inheritance of fineness-related traits of cotton fiber was studied, and the universality of main genes was further clarified. At the same time, we analyzed the lineage and maturity ratios of the fiber closely related to the micronaire value by single gene analysis of major gene-polygene in F2 and F2: 3 lines. It was initially determined that there existed a pair of major genes in line density. Genetic correlation analysis showed that the ratio of micronaire and maturity was significantly and positively correlated with uniformity, and the correlation between the two traits and other traits was inconsistent in two generations; the linear density and the uniformity were positive Related to the elongation was significantly negatively correlated with the length, strength and clothing points are not related. The correlation between line density and traits is more stable than the ratio of micronaire and maturity, and is less affected by the environment. Therefore, it is necessary to strengthen the choice of line density and further study.