Genomic analyses overturn two long‐standing homoploid hybrid speciation hypotheses

Genomic analyses overturn two long‐standing homoploid hybrid speciation hypotheses
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基因组分析推翻了两个长期存在的同倍体杂种物种形成假说

DOI:
10.1111/evo.14279
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发表时间:
2021
期刊:
影响因子:
3.3
通讯作者:
Hopkins, Robin
Hopkins, Robin
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Goulet‐Scott, Benjamin E.;Garner, Austin G.;Hopkins, Robin

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杂交在产生生物多样性中的重要性在历史上一直存在争议。以前,杂交的推断受限于对形态学数据的依赖;随着下一代非模式生物测序工具的出现,杂交的进化意义更加明显。在这里,我们检验了夹竹桃毛囊复合体中两个物种杂交起源的经典假设。形态学上的中介作用促使我们假设薄叶夹木和细叶夹木是源自mp的独立的同倍体杂交系。amoena amoenaandP。pilosa pilosa。我们使用双消化限制性内切位点相关的DNA测序,对这些分类群的个体进行了迄今为止最彻底的进化历史分析。令人惊讶的是,我们没有发现p的杂交起源的支持。pilosa deamiiorP。amoena lighthipei。我们的数据确实确定了在假定的亲本谱系之间的当代杂交区收集的个体的混合历史。我们发现三个非常不同的进化历史,其中只有一个涉及杂交起源,在p和p之间产生了中间或重组形态特征。amoena amoenaandP。pilosa pilosa。虽然形态数据仍然是产生关于过去基因流动假设的有效手段,但基因组数据现在是阐明进化史的标准证据。
The importance of hybridization in generating biological diversity has been historically controversial. Previously, inference about hybridization was limited by dependence on morphological data; with the advent of the next-generation sequencing tools for nonmodel organisms, the evolutionary significance of hybridization is more evident. Here, we test classic hypotheses of hybrid origins of two species in thePhlox pilosacomplex. Morphological intermediacy motivated the hypotheses thatPhlox amoena lighthipeiandPhlox pilosa deamiiwere independent homoploid hybrid lineages derived fromP. amoena amoenaandP. pilosa pilosa. We use double-digest restriction site-associated DNA sequencing of individuals from throughout the range of these taxa to conduct the most thorough analysis of evolutionary history in this system to date. Surprisingly, we find no support for the hybrid origin ofP. pilosa deamiiorP. amoena lighthipei. Our data do identify a history of admixture in individuals collected at a contemporary hybrid zone between the putative parent lineages. We show that three very different evolutionary histories, only one of which involves hybrid origin, have produced intermediate or recombinant morphological traits betweenP. amoena amoenaandP. pilosa pilosa. Although morphological data are still an efficient means of generating hypotheses about past gene flow, genomic data are now the standard of evidence for elucidating evolutionary history.
DOI: --
发表时间: 2000-05
期刊: Genetics
影响因子: 3.3
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影响因子: 2.9
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发表时间: 2002
期刊: American-Eurasian journal of botany
影响因子: --
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DOI: --
发表时间: 1979
期刊: Botanical Gazette
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