The ecological genetics of homoploid hybrid speciation
The ecological genetics of homoploid hybrid speciation
复制标题
DOI：
10.1093/jhered/esi026
复制
发表时间：
2005-05-01
影响因子：
3.1
通讯作者：
Rieseberg, LH
中科院分区：
文献类型：
--
作者：
Gross, BL;Rieseberg, LH
自从 50 年前编纂了同倍体杂种物种形成机制以来，我们对同倍体杂种物种形成的理解已经有了很大的进展。早期的理论和研究几乎完全集中在染色体重排的重要性上，但后来发现自然选择，特别是生态选择，也可能发挥重要作用。鉴于最近的这一转变，我们对生态学在同倍体杂种物种形成中的作用进行了评估，重点是物种形成过程的生态组成部分的遗传学。我们简要回顾了与同倍体杂种物种形成生态学相关的新理论进展；提出一系列必须回答的明确的、可测试的问题，以验证生态选择在同倍体杂种物种形成中的作用；参考这些问题讨论已发表的作品；还报告了新数据，支持生态选择在同倍体杂交向日葵物种向日葵起源中的重要性。总体而言，迄今为止收集的理论和经验证据表明，生态选择是促进同倍体杂交物种形成的主要因素，其中最有力的证据来自遗传学研究。
Our understanding of homoploid hybrid speciation has advanced substantially since this mechanism of species formation was codified 50 years ago. Early theory and research focused almost exclusively on the importance of chromosomal rearrangements, but it later became evident that natural selection, specifically ecological selection, might play a major role as well. In light of this recent shift, we present an evaluation of ecology's role in homoploid hybrid speciation, with an emphasis on the genetics underlying ecological components of the speciation process. We briefly review new theoretical developments related to the ecology of homoploid hybrid speciation; propose a set of explicit, testable questions that must be answered to verify the role of ecological selection in homoploid hybrid speciation; discuss published work with reference to these questions; and also report new data supporting the importance of ecological selection in the origin of the homoploid hybrid sunflower species Helianthus deserticola. Overall, theory and empirical evidence gathered to date suggest that ecological selection is a major factor promoting homoploid hybrid speciation, with the strongest evidence coming from genetic studies.