Institut für Pflanzenzüchtung, Saatgutforschung und Populationsgenetik (350/1), Universität Hohenheim, 70593, Stuttgart, Germany.
Theor Appl Genet. 1994 Jun;88(3-4):343-8. doi: 10.1007/BF00223643.
Theoretical results were derived to relate the heterosis and the hybrid factor (ratio of hybrid performance to parental mean) of a complex character (seed yield) with the respective parameters of component subcharacters in a multiplicative model. A multiplication factor, which is a function of differences in the parents for subcharecters, was introduced to arrive at multiplicative relationships between the parameters in the model. Under certain assumptions, gene effects of a complex multiplicative trait can be expressed in terms of gene effects for the subcharacters. Data on seed yield and its components in two crosses between Vicia faba minor and major cultivars were used as a numerical example. Theoretical and experimental results indicate that with large complementary differences for subcharacters in the parents, it is possible to find substantial heterosis in the complex character without significant heterosis in its component traits. However, a review of results from the literature shows that multiplication effects are only of minor importance in most crops. Implications for the use of multiplication effects in the breeding of hybrid, synthetic, and line cultivars are discussed.
理论结果被推导出来，将杂种优势和杂种因子（杂种表现与双亲平均值的比值）与一个复杂性状（种子产量）的组成亚性状的各自参数相关联，在一个乘法模型中。引入了一个乘法因子，它是亚性状中父母差异的函数，以达到模型中参数之间的乘法关系。在某些假设下，复杂的乘法性状的基因效应可以用亚性状的基因效应来表示。使用两个小蚕豆和大品种之间的种子产量及其成分的交叉数据作为数值示例。理论和实验结果表明，在父母之间具有较大的亚性状互补差异的情况下，即使其组成性状没有显著的杂种优势，也有可能在复杂性状中发现大量的杂种优势。然而，文献综述的结果表明，乘法效应在大多数作物中只有次要的重要性。讨论了在杂种、合成和系品种的选育中利用乘法效应的意义。
