arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2002.12831q-bio.PEnlin.AO
收藏

基于纯交配的同域物种形成

Sympatric speciation based on pure assortative mating

Rodrigo A. Caetano, Sergio Sanchez, Carolina L. N. Costa, Marcus A. M. de Aguiar

摘要:

虽然地理隔离已被证明在促进生殖隔离〈动〉<动>中起关键作用,但现在认为物种形成也可以发生在同域和相当大的基因流动中。在这里,我们提出了一个模型的同域物种形成的基础上,不需要一个遗传阈值的繁殖,即,这并不直接将个体之间的遗传差异与生殖不相容性联系起来。在这个模型中,个体与潜在配偶池中最相似的伴侣交配,而不管它有多不相似。我们表明,单是非线性可以导致形成集群的遗传相似的个人。交配缺乏最小的遗传相似性意味着杂交后代的不断产生,并带来了物种定义的老问题。在这里,我们根据遗传相似个体的聚类来定义物种,但允许不同物种之间的遗传流动。我们表明,本模型得到的结果与经验数据,其中不同的物种仍然可以复制和产生的杂交种是吻合得很好。

英文摘要:

Although geographic isolation has been shown to play a key role in promoting reproductive isolation, it is now believed that speciation can also happen in sympatry and with considerable gene flow. Here we present a model of sympatric speciation based on assortative mating that does not require a genetic threshold for reproduction, i.e., that does not directly associate genetic differences between individuals with reproductive incompatibilities. In the model individuals mate with the most similar partner in their pool of potential mates, irrespective of how dissimilar it might be. We show that assortativity alone can lead to the formation of clusters of genetically similar individuals. The absence of a minimal genetic similarity for mating implies the constant generation of hybrids and brings up the old problem of species definition. Here, we define species based on clustering of genetically similar individuals but allowing genetic flow among different species. We show that the results obtained with the present model are in good agreement with empirical data, in which different species can still reproduce and generate hybrids.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑