Faster‐haplodiploid evolution under divergence‐with‐gene‐flow: Simulations and empirical data from pine‐feeding hymenopterans
Faster‐haplodiploid evolution under divergence‐with‐gene‐flow: Simulations and empirical data from pine‐feeding hymenopterans
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基因流分化下更快的单倍二倍体进化：松树饲养膜翅目动物的模拟和经验数据
DOI：
10.1111/mec.16410
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发表时间：
2022
影响因子：
4.9
通讯作者：
Linnen, Catherine R.
中科院分区：
文献类型：
--
作者：
Bendall, Emily E.;Bagley, Robin K.;Sousa, Vitor C.;Linnen, Catherine R.
虽然单倍体在自然界广泛存在，但这种繁殖方式的进化结果并没有很好地表征。在这里，我们研究了单倍体雄性的全基因组半合子性和缺乏重组如何影响通过自然选择而经历基因流动的种群的基因组分化。首先，我们模拟了二倍体和单倍体“基因组”（500 - kb位点）在分离-迁移-突变、漂变、选择、迁移和重组模型下的进化；并检查了与发散性选择位点紧密或松散连接的中性位点的分化。无论隐性突变还是共显性突变，只要存在分化选择和迁移，单倍体群体相对于其他同等的二倍体群体而言，性别限制的半合子性和重组都会导致分化升高（即产生“更快的单倍体效应”）。其次，我们使用全基因组单核苷酸多态性数据来模拟分化历史，并描述同域居群之间的基因组分化模式。松蝇：一对松锯蝇种类（膜翅目；双翅蚜科），专门捕食不同的松树寄主。这些分析支持了在分化过程中持续基因交换的历史，并揭示了异质基因组分化的模式，这与许多非连锁位点的分化选择一致。第三，利用单倍体和二倍体种群的进化模拟，根据估计的北方野鸡和北方野鸡的分化历史。在松果体中，我们发现分化选择会导致单倍体更高的分化。基于这些结果，我们假设单倍体比二倍体更容易发生随基因流动的分化和同域物种形成。
Although haplodiploidy is widespread in nature, the evolutionary consequences of this mode of reproduction are not well characterized. Here, we examine how genome‐wide hemizygosity and a lack of recombination in haploid males affects genomic differentiation in populations that diverge via natural selection while experiencing gene flow. First, we simulated diploid and haplodiploid “genomes” (500‐kb loci) evolving under an isolation‐with‐migration model with mutation, drift, selection, migration and recombination; and examined differentiation at neutral sites both tightly and loosely linked to a divergently selected site. As long as there is divergent selection and migration, sex‐limited hemizygosity and recombination cause elevated differentiation (i.e., produce a “faster‐haplodiploid effect”) in haplodiploid populations relative to otherwise equivalent diploid populations, for both recessive and codominant mutations. Second, we used genome‐wide single nucleotide polymorphism data to model divergence history and describe patterns of genomic differentiation between sympatric populations ofNeodiprion leconteiandN.pinetum, a pair of pine sawfly species (order: Hymenoptera; family: Diprionidae) that are specialized on different pine hosts. These analyses support a history of continuous gene exchange throughout divergence and reveal a pattern of heterogeneous genomic differentiation that is consistent with divergent selection on many unlinked loci. Third, using simulations of haplodiploid and diploid populations evolving according to the estimated divergence history ofN.leconteiandN.pinetum, we found that divergent selection would lead to higher differentiation in haplodiploids. Based on these results, we hypothesize that haplodiploids undergo divergence‐with‐gene‐flow and sympatric speciation more readily than diploids.
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影响因子：
10.7
作者：
Terasaki Hart DE;Bishop AP;Wang IJ
通讯作者：
Wang IJ
影响因子：
48
作者：
Langmead, Ben;Salzberg, Steven L.
通讯作者：
Salzberg, Steven L.
在两个性别连锁位点进行选择
影响因子：
3.8
作者：
R. Owen
通讯作者：
R. Owen
影响因子：
4.9
作者：
Timothy J. Thurman;R. Barrett
通讯作者：
Timothy J. Thurman;R. Barrett
影响因子：
5.3
作者：
de la Filia, Andres G.;Bain, Stevie A.;Ross, Laura
通讯作者：
Ross, Laura