优势棉花组合F_2代农艺性状变异及其利用价值评估

Variation Evaluation of Agronomic Property and Utilization of Hybrid Cotton F-2

用产量高、优势强的陆地棉间杂交新组合F2代群体作为基础进行随机区组试验,对其重要经济性状进行了分析,结果表明:F2代群体有增产优势,单株的各个经济性状除麦克隆值需进一步验证外都表现为连续的正态分布,为典型的多微效基因控制的数量性状。品质性状分析表明:F2与F1各项指标差异不显著,但F2群体各项指标变异较大。因此在生产上对该组合F2代应该谨慎应用。

The agronomic property of elite cotton hybrid F2 was studied and the results showed that each investigated trait had authoritatively normal distribution except micrenaire, so they were typically quantitative characters. Heterosis analysis indicated that the inbreeding depression of F2 generation was significant, and the heterosis was less than F1 in yield and its component traits, but the yield of F2 generation was prior to the control. Heterosis of most fiber property was very low, some of which were negatively significant. The entire variations indicated that the segregation of fiber property trait was objective and abundant in F2 population.