摘要： 本研究采用6个陆地棉亲本的Griffing双列杂交设计模式Ⅱ对5个棉子品质性状进行了Hayman双列遗传模型分析.结果表明,种子蛋白质和油分百分含量、种子蛋白质和油分指数及仁指都适合“加性—显性”模型.种子蛋白质百分含量和指数以显性效应为主且表现超显性;种子油分百分含量和指数以加性效性应为主且表现部分显性;仁指加性和显性效应都较重要,接近完全显性.在所研究的亲本中,不同性状的显、隐性基因频率,正负效应基因的比例,显、隐性基因的方向及狭义遗传力等都明显不同.

关键词: 陆地棉, 数量性状遗传, 棉子品质, 双列遗传分析

Abstract: Five cottonseed quality traits were analysed by Hayman’s diallel genetic model with Griffing’s diallel crossing system ? of six parents.The results indicated that cottonseed protein content and index,oil content and index, and seed kernel index all conformed to "additive-dominant" model. Seed protein content and index had very important dominant effect and expressed superdominance. Cottonseed oil content and index had very important additive effect and expressed incomplete dominance. Seed kernel index had more important additive and dominant effect and closely approach complete dominance. The frequencies and directions of dominant and recessive genes, the ratios of positive and negative genes, and the narrow inheritability of various traits were obviously different within researched parents.

Key words: Upland cotton (G. hirsutum), Quantitative inheritance, Cottonseed quality, Diallel genetic analysis