Bimodal hybrid zones and speciation
Bimodal hybrid zones and speciation
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DOI：
10.1016/s0169-5347(00)01873-5
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发表时间：
2000-06-01
影响因子：
16.8
通讯作者：
Mallet, J
中科院分区：
文献类型：
--
作者：
Jiggins, CD;Mallet, J
接触带体现了物种形成的一系列阶段。在单峰杂交带中，中间体占主导地位；在双峰带杂交是罕见的，亲本形式占主导地位；最后，物种可能会重叠，但永远不会杂交。最近的研究表明，双峰性与选择性交配或受精密切相关，而与总体水平的遗传差异或内在的基因组不相容仅微弱相关。大多数双峰杂交带的生态差异表明，生态对物种形成的贡献大于基因组不相容。这种连续的稳定接触带为物种形成的途径提供了经验证据。这并不需要同种异质。
Contact zones exemplify a series of stages in speciation, In unimodal hybrid zones intermediates predominate; in bimodal zones hybrids are rare and parental forms predominate; and finally, species might overlap, but never hybridize. Recent studies show bimodality to be associated strongly with assortative mating or fertilization, and only weakly with overall levels of genetic divergence or intrinsic genomic incompatibility. Ecological divergence across most bimodal hybrid zones suggests that ecology contributes more to speciation than genomic incompatibility. This continuum of stable contact zones provides empirical evidence for a route to speciation. which does not require allopatry.