Ten years of demographic modelling of divergence and speciation in the sea.
Ten years of demographic modelling of divergence and speciation in the sea.
复制标题
海洋差异和物种形成的十年人口建模。
DOI：
10.1111/eva.13428
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发表时间：
2023-02
影响因子：
4.1
通讯作者：
中科院分区：
文献类型：
--
作者：
理解最终导致物种形成的种群分化对进化生物学至关重要。海洋物种多样性高被认为是一个悖论，因为严格的异地分布被认为是大多数物种形成事件所必需的，因为海洋中似乎基本上不存在地理障碍，许多海洋物种具有很高的扩散能力。将全基因组数据与人口建模相结合来推断人口差异的历史，为解决这一经典问题引入了新的方法。这些模型假设一个祖先群体分裂成两个亚群体，根据不同的情况，允许测试基因流动的时期。模型还可以测试种群大小和迁移率的异质性，沿着基因组，以分别考虑背景选择和对渐渗祖先的选择。为了调查海洋中基因流动的障碍是如何产生的，我们汇编了对海洋生物的人口学差异历史进行建模的研究，并提取了首选的人口学情景以及人口学参数的估计。这些研究表明，海洋中确实存在基因流动的地理障碍，但即使没有严格的隔离，也可能发生分歧。在大多数种群对中检测到基因流的异质性，表明在分歧过程中半透性屏障占主导地位。我们发现经历减少的基因流的基因组部分与全基因组分化水平之间存在弱正相关。此外，我们发现，我们的数据集的“物种形成的灰色地带”的上限超出了以前发现的范围，这意味着在比以前认为的更高的分歧水平下，不同类群之间的基因流动是可能的。最后，我们列出建议，进一步加强使用人口模型的物种形成研究。这些措施包括更平衡的分类群代表性，更一致和全面的建模，明确的结果报告和模拟研究，以排除一般结果的非生物学解释。
Understanding population divergence that eventually leads to speciation is essential for evolutionary biology. High species diversity in the sea was regarded as a paradox when strict allopatry was considered necessary for most speciation events because geographical barriers seemed largely absent in the sea, and many marine species have high dispersal capacities. Combining genome‐wide data with demographic modelling to infer the demographic history of divergence has introduced new ways to address this classical issue. These models assume an ancestral population that splits into two subpopulations diverging according to different scenarios that allow tests for periods of gene flow. Models can also test for heterogeneities in population sizes and migration rates along the genome to account, respectively, for background selection and selection against introgressed ancestry. To investigate how barriers to gene flow arise in the sea, we compiled studies modelling the demographic history of divergence in marine organisms and extracted preferred demographic scenarios together with estimates of demographic parameters. These studies show that geographical barriers to gene flow do exist in the sea but that divergence can also occur without strict isolation. Heterogeneity of gene flow was detected in most population pairs suggesting the predominance of semipermeable barriers during divergence. We found a weak positive relationship between the fraction of the genome experiencing reduced gene flow and levels of genome‐wide differentiation. Furthermore, we found that the upper bound of the ‘grey zone of speciation’ for our dataset extended beyond that found before, implying that gene flow between diverging taxa is possible at higher levels of divergence than previously thought. Finally, we list recommendations for further strengthening the use of demographic modelling in speciation research. These include a more balanced representation of taxa, more consistent and comprehensive modelling, clear reporting of results and simulation studies to rule out nonbiological explanations for general results.
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影响因子：
4.8
作者：
Cloyed, Carl S.;Grady, John M.;Dell, Anthony I.
通讯作者：
Dell, Anthony I.
DOI：
10.1111/evo.12329
发表时间：
2014-04
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
Butlin RK;Saura M;Charrier G;Jackson B;André C;Caballero A;Coyne JA;Galindo J;Grahame JW;Hollander J;Kemppainen P;Martínez-Fernández M;Panova M;Quesada H;Johannesson K;Rolán-Alvarez E
通讯作者：
Rolán-Alvarez E
影响因子：
4.9
作者：
Burri, Reto
通讯作者：
Burri, Reto
影响因子：
3.3
作者：
Barton, Nicholas H.;Rodriguez de Cara, Maria Angeles
通讯作者：
Rodriguez de Cara, Maria Angeles
影响因子：
7.7
作者：
Fraiesse, Christelle;Popovic, Iva;Roux, Camille
通讯作者：
Roux, Camille