Savannah River Ecology Laboratory, Drawer E, Aiken, SC 29801.
Proc Natl Acad Sci U S A. 1986 Apr;83(8):2526-30. doi: 10.1073/pnas.83.8.2526.
A total of 305 individuals from a hybrid population of North American tree frogs was characterized for allozyme and mitochondrial DNA (mtDNA) genotype. Species-specific mating behaviors had suggested the potential for directional hybridization, in which matings between Hyla cinerea males and Hyla gratiosa females numerically predominate over the reciprocal combination. Such directional bias leads to predictions about expected distributions of the female-transmitted mtDNA markers in F(1), backcross, and later-generation hybrids. These predictions were fully confirmed by the observed distributions of mtDNA genotypes among these allozymically inferred hybrid classes. Results exemplify the significance of stereotyped mating behaviors in determining the genetic architecture of a hybrid population.
对北美树蛙的混合种群中的 305 个人进行了同工酶和线粒体 DNA（mtDNA）基因型分析。种间特异性的交配行为表明存在定向杂交的可能性，其中 Hyla cinerea 雄性与 Hyla gratiosa 雌性的交配数量超过了相反的组合。这种定向偏差导致了对 F(1)、回交和后期杂交后代中雌性传递的 mtDNA 标记预期分布的预测。这些预测完全被观察到的 mtDNA 基因型在这些同工酶推断的杂种类群中的分布所证实。研究结果例证了刻板的交配行为在确定杂种群体的遗传结构方面的重要性。
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