Sex‐linked genetic diversity and differentiation in a globally distributed avian species complex
Sex‐linked genetic diversity and differentiation in a globally distributed avian species complex
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全球分布的鸟类物种复合体中性别相关的遗传多样性和分化
DOI：
10.1111/mec.15885
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发表时间：
2021
影响因子：
4.9
通讯作者：
Koyama, Kazuo
中科院分区：
文献类型：
--
作者：
Schield, Drew R.;Scordato, Elizabeth S.;Smith, Chris C.;Carter, Javan K.;Cherkaoui, Sidi Imad;Gombobaatar, Sundev;Hajib, Said;Hanane, Saad;Hund, Amanda K.;Koyama, Kazuo
由于遗传和人口统计学的独特模式，性染色体通常具有不同的遗传变异模式。突变、重组、遗传漂变和选择的过程也会影响性染色体上的进化速率，这与常染色体不同。测量这些差异提供了关于这些过程如何塑造基因组变异及其在物种起源中的作用的信息。为了检验关于常染色体和性连锁基因组多样性和分化模式的假设和预测，我们测量了家燕（Hirundo rustica）种群和亚种内和种群之间的种群遗传统计数据，并在常染色体和Z连锁基因组区域之间进行了明确的比较。我们首先测试了相对于常染色体的低Z连锁遗传多样性和高Z连锁群体分化的证据，然后测试了Z染色体由于更快的谱系分选而具有更大的祖先信息的证据。最后，我们调查了地理跨杂交区的倾向的证据表明，Z染色体是耐基因渗入，由于对杂交选择。我们发现的证据表明，家燕交配系统，人口统计学历史和连锁选择各自有助于低Z连锁多样性和高Z连锁分化。虽然不完全谱系排序在整个基因组中很普遍，但我们的结果表明Z上祖先多态性的排序更快。最后，杂交区分析表明Z染色体上的渐渗障碍，这表明性连锁性状在生殖隔离中很重要，特别是在迁移分界区。我们的研究强调了选择、基因流动和人口统计学如何塑造与性别相关的遗传多样性，并强调了Z染色体在物种形成中的相关性。
Sex chromosomes often bear distinct patterns of genetic variation due to unique patterns of inheritance and demography. The processes of mutation, recombination, genetic drift and selection also influence rates of evolution on sex chromosomes differently than autosomes. Measuring such differences provides information about how these processes shape genomic variation and their roles in the origin of species. To test hypotheses and predictions about patterns of autosomal and sex‐linked genomic diversity and differentiation, we measured population genetic statistics within and between populations and subspecies of the barn swallow (Hirundo rustica) and performed explicit comparisons between autosomal and Z‐linked genomic regions. We first tested for evidence of low Z‐linked genetic diversity and high Z‐linked population differentiation relative to autosomes, then for evidence that the Z chromosome bears greater ancestry information due to faster lineage sorting. Finally, we investigated geographical clines across hybrid zones for evidence that the Z chromosome is resistant to introgression due to selection against hybrids. We found evidence that the barn swallow mating system, demographic history and linked selection each contribute to low Z‐linked diversity and high Z‐linked differentiation. While incomplete lineage sorting is rampant across the genome, our results indicate faster sorting of ancestral polymorphism on the Z. Finally, hybrid zone analyses indicate barriers to introgression on the Z chromosome, suggesting that sex‐linked traits are important in reproductive isolation, especially in migratory divide regions. Our study highlights how selection, gene flow and demography shape sex‐linked genetic diversity and underlines the relevance of the Z chromosome in speciation.
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性选择和性联系
DOI：
--
发表时间：
2004
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
M. Kirkpatrick;David W. Hall
通讯作者：
David W. Hall
关于不同性别人口的有效规模，特别是与性别相关的基因。
影响因子：
3.3
作者：
Armando Caballero
通讯作者：
Armando Caballero
影响因子：
4.9
作者：
Elgvin, Tore O.;Hermansen, Jo S.;Saetre, Glenn-Peter
通讯作者：
Saetre, Glenn-Peter
影响因子：
1.5
作者：
Charlesworth, B
通讯作者：
Charlesworth, B
影响因子：
5.8
作者：
Chirag Jain;S. Koren;A. Dilthey;A. Phillippy;S. Aluru
通讯作者：
Chirag Jain;S. Koren;A. Dilthey;A. Phillippy;S. Aluru