AN EPISTATIC MATING SYSTEM MODEL CAN PRODUCE PERMANENT CYTONUCLEAR DISEQUILIBRIA IN A HYBRID ZONE
AN EPISTATIC MATING SYSTEM MODEL CAN PRODUCE PERMANENT CYTONUCLEAR DISEQUILIBRIA IN A HYBRID ZONE
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DOI：
10.1073/pnas.85.6.1893
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发表时间：
1988-03-01
影响因子：
11.1
通讯作者：
AVISE, JC
中科院分区：
文献类型：
--
作者：
ARNOLD, J;ASMUSSEN, MA;AVISE, JC
我们研究了与杂交区相关的两种交配系统模型下细胞质基因和核基因之间的配子和基因型不平衡的进化动力学。在第一个模型中，雌性交配偏好是由两个基因座之间的上位相互作用决定的，对于各种初始基因型频率，可能会出现永久性非零细胞核不平衡，特别是当两个亲本物种的选型交配率很高时。相反，当交配偏好由细胞质基因和亲本物种的多位点核基因型特征之间的相互作用有效决定时，所有细胞核不平衡以及纯亲本的频率都会迅速衰减到零，除非选型交配近乎完美。模型的结果应用于解释在雨蛙树蛙杂交种群中观察到的细胞核关联。
We examine the evolutionary dynamics of gametic and genotypic disequilibria between a cytoplasmic gene and a nuclear gene under two mating system models relevant to hybrid zones. In the first model, in which female mating preference is determined by an epistatic interaction between the two loci, permanent nonzero cytonuclear disequilibria are possible for a variety of initial genotype frequencies, particularly when rates of assortative mating for the two parental species are high. In contrast, when mating preference is effectively determined by interaction between a cytoplasmic gene and the multilocus nuclear genotypes characteristic of the parental species, all cytonuclear disequilibria, as well as frequencies of pure parentals, rapidly decay to zero unless assortative mating is nearly perfect. Results of the models are applied to the interpretation of observed cytonuclear associations in a hybrid population of Hyla tree frogs.