Spatially and temporally varying selection influence species boundaries in two sympatric Mimulus.
Spatially and temporally varying selection influence species boundaries in two sympatric Mimulus.
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DOI：
10.1098/rspb.2022.2279
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发表时间：
2023-02-08
影响因子：
4.7
通讯作者：
Ferris, Kathleen G.
中科院分区：
文献类型：
--
作者：
Tataru, Diana;Wheeler, Emma C.;Ferris, Kathleen G.
关键词：
时空变化的选择可以维持种群内和种群间的遗传变异，但这些力量如何影响密切相关的物种之间的分歧还不太清楚。我们确定的时间和空间变化的相互作用，在选择和他们的作用，无论是加强或侵蚀两个密切相关的Mimulus物种之间的分歧。采用高世代杂种重复交互移植试验，比较了不同水分条件下，斑拟小眼鲷和裂条拟小眼鲷对适应性和生殖隔离相关数量性状的选择强度。我们发现，在2013年干旱期间，物种差异的方向上的性状强烈分歧的栖息地介导的选择，这表明空间变化的选择保持物种的分歧。然而，在一个异常潮湿的年份（2019年），包括开花时间，这是在合子前隔离参与的大多数性状的发散选择放松，表明选择的时间变化可能会削弱物种差异。因此，我们发现的证据表明，时间和空间变化的选择可能有相反的作用，在调解物种边界。考虑到我们不断变化的气候，未来的生长季节预计将与干旱年份更加相似，这表明在这个系统中，气候变化实际上可能会增加物种的分化。
Spatially and temporally varying selection can maintain genetic variation within and between populations, but it is less well known how these forces influence divergence between closely related species. We identify the interaction of temporal and spatial variation in selection and their role in either reinforcing or eroding divergence between two closely related Mimulus species. Using repeated reciprocal transplant experiments with advanced generation hybrids, we compare the strength of selection on quantitative traits involved in adaptation and reproductive isolation in Mimulus guttatus and Mimulus laciniatus between two years with dramatically different water availability. We found strong divergent habitat-mediated selection on traits in the direction of species differences during a drought in 2013, suggesting that spatially varying selection maintains species divergence. However, a relaxation in divergent selection on most traits in an unusually wet year (2019), including flowering time, which is involved in pre-zygotic isolation, suggests that temporal variation in selection may weaken species differences. Therefore, we find evidence that temporally and spatially varying selection may have opposing roles in mediating species boundaries. Given our changing climate, future growing seasons are expected to be more similar to the dry year, suggesting that in this system climate change may actually increase species divergence.
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影响因子：
2.1
作者：
Dunning LT;Hipperson H;Baker WJ;Butlin RK;Devaux C;Hutton I;Igea J;Papadopulos AS;Quan X;Smadja CM;Turnbull CG;Savolainen V
通讯作者：
Savolainen V
影响因子：
2.2
作者：
Fournier, David A.;Skaug, Hans J.;Sibert, John
通讯作者：
Sibert, John
影响因子：
56.9
作者：
Crimmins, Shawn M.;Dobrowski, Solomon Z.;Mynsberge, Alison R.
通讯作者：
Mynsberge, Alison R.
影响因子：
2.3
作者：
Arathi, HS;Kelly, JK
通讯作者：
Kelly, JK
DOI：
10.1111/evo.12259
发表时间：
2014-01
期刊：
Evolution; international journal of organic evolution
影响因子：
--
作者：
Anderson JT;Lee CR;Mitchell-Olds T
通讯作者：
Mitchell-Olds T