【摘要】 本文分析了十个现代陆地棉品种八个主要产量和品质性状的相关,结果表明:品质性状间的关系较产量性状更为复杂,在现代品种中产量因素和品质性状间除细度外,均表现为不同程度不显著的正相关。相关遗传力通径分析显示细度是现代品种产量和品质同时改良的限制因子。文中提出今后陆地棉优质育种应以断裂长度为目标性状,产量的提高不应过分强调高衣分,而应注重于单株铃数的提高。更多还原

【Abstract】 This paper deals with the correlation between 8 main characters of yield and fiber quality in 10 current upland cotton cultivars. The results show that relation between fiber quality traits is more complex than that between yield traits. There are positive correlations of different degrees between yield and fiber quality characters in current cotton cultivars except for fineness. The path analysis indicates that fineness is a limiting factor to simultaneous improvement of yield and fiber quality traits in current cultivars. To readjust the relation between yield and fiber quality, the breaking length must be used as indicative character in fiber quality breeding. It was proposed that for future high yield breeding we should not overempha size high ginning percentage, and instead, the increase of boll numbers per plant should be focused.更多还原