Founder effect speciation: A theoretical reassessment
Founder effect speciation: A theoretical reassessment
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DOI：
10.1086/285861
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发表时间：
1996-03-01
影响因子：
2.9
通讯作者：
Hastings, A
中科院分区：
文献类型：
--
作者：
Gavrilets, S;Hastings, A
我们提出了一系列简单的方正效应物种形成模型。在这些模型中，由此产生的生殖隔离(以不能存活的杂交种的比例或种群之间基因交换障碍的强度来衡量)可能非常高，并可能在数十代或数百代的时间尺度上以很高的概率进化。在发展我们的理论框架时，我们利用了Dobzansky的观点，即针对两个基因类型之间的杂交的强烈选择可以同时发生，同时存在连接这两个基因类型的一系列基因型链，并且它们之间的适合度只有微弱的差异。我们研究的数学模型与迈尔的“遗传革命”、卡森的创建者-沉默过程和邓普顿的遗传传递性的口头方案密切相关，对于适当的参数值，我们的理论模型表明创始人效应物种形成是可信的；它的重要性成为一个经验问题。
We propose a series of simple models of founder effect speciation. In these models, the resulting reproductive isolation (as measured by the proportion of inviable hybrids or the strength of the barrier to gene exchange between populations) can be very high and can evolve with a high probability on the time scale of dozens or hundreds of generations. In developing our theoretical framework, we utilize Dobzhansky's idea that strong selection against hybrids between two genotypes can occur simultaneously with the existence of a chain of genotypes that connect those two and differ only weakly in fitness among themselves. The mathematical models that we have studied are closely related to the verbal schemes of Mayr's ''genetic revolutions,'' Carson's founder-hush process, and Templeton's genetic transilience, For appropriate parameter values, our theoretical models demonstrate that founder effect speciation is plausible; its importance becomes an empirical question.