Dean R, Arnold J
USDA PGRCU, Griffin, GA 30223, USA.
Genetica. 1997;101(3):215-23. doi: 10.1023/a:1018368826538.
Unidirectional incompatibility selection is examined as an alternate mechanism of natural selection to cytoplasmic male sterility (CMS) for generating cytonuclear disequilibria. Differences in the dynamics and equilibrium behavior of cytonuclear disequilibria between these two cytonuclear selection models may allow for statistical tests of CMS vs. unidirectional incompatibility between mating cytotypes. Unlike CMS without migration, unidirectional incompatibility causes the cytoplasmic allele frequency to change over time rather than remain constant, and the nuclear allele frequencies hitchhike on the cytoplasmic frequencies. The decay of disequilibria is also distinctive in the absence of migration. Furthermore, in comparing both models with migration it is seen that the opportunity for internal equilibrium can be two or three times higher in a unidirectional incompatibility vs. CMS model. An example is presented that shows how unidirectional incompatibility can be statistically eliminated as a possible mechanism of cytonuclear selection.
单向不亲和性选择作为自然选择的一种替代机制，被用于研究其与细胞质雄性不育（CMS）产生细胞核质不平衡的关系。这两种细胞核质选择模型在细胞核质不平衡的动态和平衡行为上存在差异，这可能使得对交配细胞类型之间的CMS与单向不亲和性进行统计检验成为可能。与无迁移的CMS不同，单向不亲和性会导致细胞质等位基因频率随时间变化而非保持恒定，并且核等位基因频率会随细胞质频率而变化。在没有迁移的情况下，不平衡的衰减也具有独特性。此外，在比较两种有迁移的模型时，可以发现单向不亲和性模型中内部平衡的机会比CMS模型高两到三倍。文中给出了一个例子，展示了如何通过统计方法排除单向不亲和性作为细胞核质选择可能机制的可能性。
