Subspecies at crossroads: the evolutionary significance of genomic and phenotypic variation in a wide-ranging Australian lizard ( Ctenotus pantherinus )
Subspecies at crossroads: the evolutionary significance of genomic and phenotypic variation in a wide-ranging Australian lizard ( Ctenotus pantherinus )
复制标题
十字路口的亚种：广泛分布的澳大利亚蜥蜴（Ctenotus pantherinus）基因组和表型变异的进化意义
DOI：
10.1093/zoolinnean/zlac076
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发表时间：
2022
影响因子：
2.8
通讯作者：
Rabosky, Daniel L.
中科院分区：
文献类型：
--
作者：
Prates, Ivan;Doughty, Paul;Rabosky, Daniel L.
许多亚种被描述为在广泛的分类群中捕获表型变异，后来发现一些亚种对应于不同的遗传谱系。我们调查是否目前公认的亚种对应于独特的和连贯的进化谱系在广泛的澳大利亚lizardCtenotus pantherinus基于形态，线粒体和全基因组的核变异。我们发现弱和不一致的对应关系的形态模式和假定的亚种范围内，字符多态性的区域和广泛的形态重叠跨区域。系统发育分析表明，可分配到每个亚种，线粒体不一致和亚种范围和推断的分支分布之间的一致性的人口paraphyly。基因型聚类支持跨区域混合。这些结果破坏了假定的表型和基因型的一致性和独特性的C。豹亚科根据我们的研究结果，我们评论的操作和概念上的缺陷形态学定义的亚种，并讨论实际的挑战，在应用的一般概念的亚种不完全分离的人口谱系。最后，我们强调了一个历史的不对称性，对生态学，进化和保护的影响：在过去提出的亚种是很难伪造，即使面对新的数据，挑战他们的一致性和独特性，而现代研究人员似乎犹豫不决，提出新的亚种。
Many subspecies were described to capture phenotypic variation in wide-ranging taxa, with some later being found to correspond to divergent genetic lineages. We investigate whether currently recognized subspecies correspond to distinctive and coherent evolutionary lineages in the widespread Australian lizardCtenotus pantherinusbased on morphological, mitochondrial and genome-wide nuclear variation. We find weak and inconsistent correspondence between morphological patterns and the presumed subspecies ranges, with character polymorphism within regions and broad morphological overlap across regions. Phylogenetic analyses suggest paraphyly of populations assignable to each subspecies, mitonuclear discordance and little congruence between subspecies ranges and the distribution of inferred clades. Genotypic clustering supports admixture across regions. These results undermine the presumed phenotypic and genotypic coherence and distinctiveness ofC. pantherinussubspecies. Based on our findings, we comment on the operational and conceptual shortcomings of morphologically defined subspecies and discuss practical challenges in applying the general notion of subspecies as incompletely separated population lineages. We conclude by highlighting a historical asymmetry that has implications for ecology, evolution and conservation: subspecies proposed in the past are difficult to falsify even in the face of new data that challenge their coherence and distinctiveness, whereas modern researchers appear hesitant to propose new subspecies.