Genomic architecture and introgression shape a butterfly radiation
Genomic architecture and introgression shape a butterfly radiation
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DOI：
10.1126/science.aaw2090
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发表时间：
2019-11-01
期刊：
影响因子：
56.9
通讯作者：
Mallet, James
中科院分区：
文献类型：
--
作者：
Edelman, Nathaniel B.;Frandsen, Paul B.;Mallet, James
我们使用了20从头基因组组件，以探测物种形成的历史和架构的基因流在快速辐射Heliconius蝴蝶。我们的测试，以区分不完整的血统排序从渗入表明，基因流已经掩盖了几个古老的系统发育关系，在这个组在大片的基因组。渗入基因座在低重组和基因丰富的区域中代表性不足，这与清除与不亲和基因座更紧密连锁的外来等位基因一致。在这里，我们确定了一个迄今为止未知的反转，陷阱的颜色模式开关轨迹。我们推断，这种倒置是通过渐渗在谱系之间转移的，并且在属的另一部分中与类似的重排收敛。这些多个从头基因组序列，使适应性辐射的基因渗入和选择过程的重要性，提高了理解。
We used 20 de novo genome assemblies to probe the speciation history and architecture of gene flow in rapidly radiating Heliconius butterflies. Our tests to distinguish incomplete lineage sorting from introgression indicate that gene flow has obscured several ancient phylogenetic relationships in this group over large swathes of the genome. Introgressed loci are underrepresented in low-recombination and gene-rich regions, consistent with the purging of foreign alleles more tightly linked to incompatibility loci. Here, we identify a hitherto unknown inversion that traps a color pattern switch locus. We infer that this inversion was transferred between lineages by introgression and is convergent with a similar rearrangement in another part of the genus. These multiple de novo genome sequences enable improved understanding of the importance of introgression and selective processes in adaptive radiation.