Speciation by reinforcement: a model derived from studies of Drosophila.
Speciation by reinforcement: a model derived from studies of Drosophila.
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强化物种形成：源自果蝇研究的模型。
DOI：
10.1093/genetics/143.3.1485
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发表时间：
1996
期刊：
影响因子：
3.3
通讯作者：
Noor,MA
中科院分区：
文献类型：
--
作者：
Kelly,JK;Noor,MA
强化是增加交配前生殖隔离类群之间产生的选择对杂种。我们提出了一个模型的强化与一种新的类型的选择女性交配行为。先前的强化模型集中在新生物种之间雌性交配偏好的分歧上。我们认为，女性交配歧视水平的增加，可以产生强化，而没有进一步的分歧，无论是男性角色或女性的喜好。该模型表明，交配歧视的选择是一个可行的机制，加强，并可能允许物种形成的条件下，严格的选择比女性的偏好。该模型还结合了果蝇属物种的杂交适应度决定的遗传研究的经验结果。我们发现，遗传的细节，包括性连锁传播，性限制生育能力降低，和X-常染色体上位性，对强化的可能性有重要影响。特别是，X-常染色体上位性杂交健身决定有利于加强时，发生在男性的杂交生育能力下降，但阻碍了这一进程时，它发生在女性。哈勒斯法则表明，在新生物种中，杂种不育性通常先在雄性中进化，然后在雌性中进化。因此，哈勒定律和X-常染色体上位性为果蝇的强化提供了令人惊讶的有利条件。
Reinforcement is an increase in premating reproductive isolation between taxa resulting from selection against hybrids. We present a model of reinforcement with a novel type of selection on female mating behavior. Previous models of reinforcement have focused on the divergence of female mating preferences between nascent species. We suggest that an increase in the level of female mating discrimination can yield reinforcement without further divergence of either male characters or female preferences. This model indicates that selection on mating discrimination is a viable mechanism for reinforcement and may allow speciation under less stringent conditions than selection on female preference. This model also incorporates empirical results from genetic studies of hybrid fitness determination in Drosophila species. We find that the details of inheritance, which include sex-linked transmission, sex-limited fertility reduction, andX-autosome epistasis, have important effects on the likelihood of reinforcement. In particular,X-autosome epistasis for hybrid fitness determination facilitates reinforcement when hybrid fertility reduction occurs in males, but hinders the process when it occurs in females. Haldane'srule indicates that hybrid sterility will generally evolve in males prior to females within nascent species. Thus, Haldane'srule andX-autosome epistasis provide conditions that are surprisingly favorable for reinforcement in Drosophila.