Lijtmaer Darío A, Mahler Bettina, Tubaro Pablo L
División Ornitología, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Avenida Angel Gallardo 470 (CI405DJR), Buenos Aires, Argentina.
Evolution. 2003 Jun;57(6):1411-8. doi: 10.1111/j.0014-3820.2003.tb00348.x.
The study of the patterns of reproductive isolation in relation to species divergence is critical for the understanding of the process of speciation. Comparative analyses of this kind were previously conducted in Drosophila, Lepidoptera, frogs, ducks, and birds in general. In the present study, we used information from the literature to analyze hybrid inviability in relation to species divergence in pigeons and doves. Four main patterns arose from this analysis: (1) as in the other groups studied, F1 hybrid inviability gradually increases as species diverge, the time needed to reach total inviability being higher in birds than in the other groups; (2) as expected, the presence of geographic overlap does not influence the evolution of postzygotic isolation; (3) the percentage of unhatched eggs does not differ between hybrids of the first generation and the backcrosses, but it increases in the second hybrid generation; and (4) pigeons and doves follow Haldane's rule, as found in the other groups studied so far. The similarity between the results of this and previous studies contributes to the growing evidence suggesting that the patterns of the evolution of postzygotic isolation, and the process of speciation in general, are shared among animal groups.
研究生殖隔离模式与物种分化之间的关系对于理解物种形成过程至关重要。此前，人们已在果蝇、鳞翅目昆虫、青蛙、鸭子及鸟类等动物中开展了此类比较分析。在本研究中，我们利用文献中的信息来分析鸽子和鸠鸽科鸟类的杂种 inviability 与物种分化的关系。该分析得出了四种主要模式：（1）与其他已研究的类群一样，随着物种分化，F1 杂种 inviability 逐渐增加，鸟类达到完全 inviability 所需的时间比其他类群更长；（2）正如预期的那样，地理重叠的存在并不影响合子后隔离的进化；（3）第一代杂种和回交杂种未孵化卵的百分比没有差异，但在第二代杂种中有所增加；（4）鸽子和鸠鸽科鸟类遵循霍尔丹法则，这与迄今研究的其他类群情况相同。本研究结果与先前研究结果的相似性进一步证明，合子后隔离的进化模式以及一般的物种形成过程在动物类群中具有共性。
