作物品种间杂种优势遗传分析的新方法

本文提出了分析双列杂交试验资料的两个遗传模型。第一个模型包括加性、显性和母体效应;第二个模型只包括简单的加性和显性效应。还介绍了分析杂种优势、估算遗传方差分量以及预测遗传效应值的相应统计分析方法。用所介绍的遗传模型和分析方法以及常用的Griffing配合力分析方法,分析了棉花6个品种双列杂交的产量性状,并进一步比较了不同方法的分析结果。采用本文所介绍的遗传模型和分析方法,可以克服用Griffing的配合力模型及其方法分析杂种优势和配合力遗传表现所存在的局限性。

A Genetic Approach for Analyzing Intra-cultivar Heterosis in Crops

Two genetic models are proposed for analyzing experimental data from diallel crosses. The first model includes maternal effects as well as additive and dominance effects. The second one is a reduced model without maternal effects. Statistic methods are introduced for analyzing heterosis, estimating genetic variance components, and predicting genetic effects. A diallel cross with six parents are analyzed for yield traits in cotton by the methods for these two models and by the method for Griffing's combining ability analysis. The analysis, results are compared for these different methods. By applying the models and methods proposed in this paper, hetero-sis and genetic effects for quantitative traits can be better analyzed than by using Griffing's model and method for combining ability analysis.