棉花产量性状与纤维品质性状的关联度及典型相关分析

关联度分析表明:棉花纤维品质性状中,纺纱均匀性指数是制约2.5%跨长、整齐度与比强度的主导因素,2.5%跨长是制约麦克隆值的主导因素,比强度是制约纺纱均匀性指数的主导因素;产量性状中,铃重是制约株铃数的主导因素,衣指是制约铃重、衣分及子指的主导因素,子指是制约衣指的主导因素。通径分析结果显示,整齐度与衣分对皮棉产量的综合直接作用最大。经典型相关分析可知,增加株铃数有利于提高产量和改善纤维品质,但要注意优化成铃时间与部位,争取多结优质铃。

The Grey Relational Grade and Canonical Correlation Between Yield Components and Fiber Quality of Cotton

The Grey interrelative analysis showed that,among the traits of fiber quality,the index of spinning uniformity is a leading factor that affects 2.5%-span length,uniform and strength;2.5%-span length is a leading factor affecting Micronaire;and strength is a leading factor affecting the index of spinning uniformity.Among the yield characters,boll weight is a leading factor affecting boll numbers;lint index is a leading factor affecting boll weight,lint percentage and seed index;and seed index is a leading factor affecting lint index.The restoring menstrual analysis indicated that uniformity and lint percentage play the most comprehensive and direct role in the lint yield.The canonical correlation analysis showed that increasing boll numbers per plant could improve yield and fiber quality,but more attention should be paid to better boll-setting time and position in order to get as more as higher quality bolls.