Large- and small-scale geographic structures affecting genetic patterns across populations of an Alpine butterfly.
Large- and small-scale geographic structures affecting genetic patterns across populations of an Alpine butterfly.
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DOI：
10.1002/ece3.8157
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发表时间：
2021-11
影响因子：
2.6
通讯作者：
Fischer K
中科院分区：
文献类型：
--
作者：
Trense D;Hoffmann AA;Fischer K
在当前全球气候变化和栖息地丧失的时代，了解影响物种遗传多样性模式和种群遗传结构的因素尤为重要。这些因素包括一个物种的进化史，以及它所处环境的异质性，这反过来又会随着时间的推移而改变。大多数调查时空遗传模式的研究都侧重于广泛地理区域的模式，而不是局部变异，但后者在地形复杂的地区尤其重要。在这里，我们在欧洲阿尔卑斯山的黑铜蝴蝶（Lycaena tityrus）中考虑了这些问题，使用通过RADseq鉴定的全基因组snp。结果表明，阿尔卑斯山脉内部遗传分化明显，有西部、中部和东部4个遗传聚集区，遗传多样性从西向东明显减少。多样性的减少可能表明，与其他避难所相比，西南避难所是最大的。此外，西部的高遗传多样性可能是由于(a)不同西部避难所的混合，(b)最近的人口变化，或(c)低地L. tityrus种群的渗入。在小空间尺度上，种群结构由多种景观特征构成，尤其是高山山脊和大河谷。我们检测到36个可能在海拔选择下的异常位点，包括几个与膜和细胞过程相关的位点。我们建议保护阿尔卑斯山脉西部的高寒雪杉种群应集中在遗传多样性的种群上，而白云石种群应被视为遗传上不同的管理单元，因为它们目前比其他种群受到的威胁更大。这项研究证明了基于SNP的方法对于理解一个特别容易受到气候变化影响的地区的遗传多样性、基因流动和选择模式的有用性。我们的目的是在不同的空间尺度上揭示影响欧洲阿尔卑斯地区Lycaena tityrus蝴蝶当代遗传结构的空间和历史因素。SNP分析表明，欧洲阿尔卑斯地区白云岩居群间存在明显的遗传分化，遗传多样性从西向东递减，白云岩居群间存在明显的分离。在较小的范围内，高的山脊和大的河谷阻碍了基因流动和种群结构。
Understanding factors influencing patterns of genetic diversity and the population genetic structure of species is of particular importance in the current era of global climate change and habitat loss. These factors include the evolutionary history of a species as well as heterogeneity in the environment it occupies, which in turn can change across time. Most studies investigating spatio‐temporal genetic patterns have focused on patterns across wide geographic areas rather than local variation, but the latter can nevertheless be important particularly in topographically complex areas. Here, we consider these issues in the Sooty Copper butterfly (Lycaena tityrus) from the European Alps, using genome‐wide SNPs identified through RADseq. We found strong genetic differentiation within the Alps with four genetic clusters, indicating western, central, and eastern refuges, and a strong reduction of genetic diversity from west to east. This reduction in diversity may suggest that the southwestern refuge was the largest one in comparison to other refuges. Also, the high genetic diversity in the west may result from (a) admixture of different western refuges, (b) more recent demographic changes, or (c) introgression of lowland L. tityrus populations. At small spatial scales, populations were structured by several landscape features and especially by high mountain ridges and large river valleys. We detected 36 outlier loci likely under altitudinal selection, including several loci related to membranes and cellular processes. We suggest that efforts to preserve alpine L. tityrus should focus on the genetically diverse populations in the western Alps, and that the dolomite populations should be treated as genetically distinct management units, since they appear to be currently more threatened than others. This study demonstrates the usefulness of SNP‐based approaches for understanding patterns of genetic diversity, gene flow, and selection in a region that is expected to be particularly vulnerable to climate change. We aim at unraveling the spatial and historical factors having shaped the contemporary genetic structure of the butterfly Lycaena tityrus in the European Alps at different spatial scales. SNP analyses showed a strong genetic differentiation between populations in the European Alps, a decrease in genetic diversity from west to east, and a clear separation of the dolomite populations. At a smaller scale, high mountain ridges and large river valleys hampered gene flow and structured populations.
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DOI：
10.1198/108571102320
发表时间：
2002-09-01
影响因子：
1.4
作者：
Clarke, RT;Rothery, P;Raybould, AF
通讯作者：
Raybould, AF
影响因子：
56.9
作者：
Butchart, Stuart H. M.;Walpole, Matt;Watson, Reg
通讯作者：
Watson, Reg
影响因子：
1.4
作者：
Austerlitz, F;JungMuller, B;Gouyon, PH
通讯作者：
Gouyon, PH
影响因子：
3.1
作者：
BRITTEN, HB;BRUSSARD, PF;EHRLICH, PR
通讯作者：
EHRLICH, PR
影响因子：
5.8
作者：
Cornuet, Jean-Marie;Pudlo, Pierre;Estoup, Arnaud
通讯作者：
Estoup, Arnaud