陆地棉品种间杂种主要性状的遗传相关和通径分析  

Genetic Correlation and Path Coefficient Analysis on Major Economic Traits among Upland Cotton Hybrids

作　　者：李定国[1] 张文英[1] 

机构地区：[1]长江大学农学院,湖北荆州434025

出　　处：《江西棉花》2005年第1期7-12,共6页Jiangxi Cottons

基　　金：湖北省教育厅资助项目(2004X047);长江大学作物遗传育种省级重点学科资助。

摘　　要：研究了陆地棉品种间杂种F1代主要经济性状间的相互关系,并对皮棉产量、纤维长度和霜前花率等3个目标性状进行了遗传通径分析。结果表明,单铃重与皮棉产量遗传相关最密切,对皮棉产量的直接遗传正效应也最大;纤维长度与霜前花率遗传正相关最密切,而对纤维长度的直接遗传正效应最大的则是皮棉产量;霜前花率与单铃重遗传正相关最密切,对霜前花率直接遗传正效应最大的是衣指。通过研究提出高产、优质、早熟性的杂种F1代选育的主攻方向是以抗病性为前提,首抓铃重,次抓衣指。Study on the correlation of upland cotton cultivar hybrids F1 among the major economical traits, and analyze on path coefficient of lint yield , lint length and lint yield rate before frost. The results indicated that genetic correlation of boll weigh and lint yield was closed. Positive genetic effect is signal to lint yield; fiber length and lint yield rate before frost are closely about positive genetic correlation, and lint yield on positive genetic correlation is signal to fiber length ; lint yield rate before frost and boll weight are closely about positive genetic correlation, and lint index on positive genetic correlation is signal to lint yield rate before frost. Through the study pointed that the major direction of crop hybrid breeding about high-yield, top-quality and earliness is disease-resisted, boll weight and lint index.

关 键 词：霜前花率 遗传相关 皮棉产量 通径分析 陆地棉 主要性状 单铃重 最大 正效应 主要经济 

分 类 号：S562[农业科学—作物学] S511