基于AMMI模型的NCⅡ交配设计试验的配合力分析

Analysis of Combining Ability Based on AMMI Model

AMMI模型是基因型与环境互作效应分析的有效工具 ,而特殊配合力实际上也是父母本间的互作效应。本文用该模型对 NC 交配设计试验的配合力进行分析 ,结果表明可提高特殊配合力估值的准确性。实例分析结果表明 ,AMMI模型估计的特殊配合力效应值与传统分析方法的结果在大小上有程度的差异 ,但方向相同 ;特殊配合力方差 D2与 K2大小在不育系中的排序一致 ,而在恢复系中的排序有差异。讨论了

AMMI model is a very effective tool for analyzing the interaction between genoty pe and environment. In fact, the special combining ability (Sca) for hybrid comb ination is a kind of interaction, too. The data from NCⅡ mating design were ana lysed by AMMI model in this paper. The results showed that this method could pro vide more accurate estimates of Sca effects. The results of an applied example s howed that between the estimates of Sca effects using AMMI model and classic way had only smaller difference. According to estimates of Sca variance D 2 and K 2 (coming from AMMI model and classic way, espectively), there was same order fo r CMS lines, but the order for restorer lines had larger difference. The possibi lity was also discussed for application of the scores of significant IPCA axises in breeding for Sca.