陆地棉主要经济性状的遗传相关分析

ANALYSIS OF GENELICAL CORRELATION FOR MAIN ECONOMIC TRAITS IN UPLAND COTTON

本研究采用加性—显性与环境互作的遗传模型 ,分析陆地棉 8个杂交亲本和F1 代 2 8个组合的 12个主要经济性状的两年试验资料 ,估算各项遗传方差分量和成对性状间各项遗传效应的相关。结果表明 ,产量性状间的相关受加性、显性和加性与环境互作相关共同影响。皮棉产量与纤维品质间的相关主要是加性效应相关。皮棉产量与纤维长度、麦克隆值呈正相关 ,与纤维强度、伸长率、整齐度呈负相关。纤维强度与纤维长度、整齐度、麦克隆值呈加性正相关。单铃重与衣分呈负相关。衣分与产量呈正相关 ,与纤维品质呈负相关。

Two year's data of seven yield traits and five fiber traits of 8 parents and their 28 F 1 crosses of upland cotton were analyzed by the genetic model of additive dominance and its interactions with environments by MINQUE(1) approaches. Genetic variance components and correlations were estimated. The results indicated that all yield trait correlation were significant, and mainly controlled by the additive correlation and dominant correlation and its interactions with environments. The significant correlation were additive effects of lint yield with fiber traits. Lint yield with fiber length and micronaire value were positive correlated. Lint yield with fiber strength and elongation and uniformity were negative correlations. The additive positive correlations of fiber strength with fiber length and uniformity and micronaire value were significant. The inaividual boll weight with lint percentage were negative correlated. The lint percentage with yield were correlated positively and significantly. The lint percent with fiber characters were correlated negatively and significantly.