Polyandry provides reproductive and genetic benefits in colonising populations.
Polyandry provides reproductive and genetic benefits in colonising populations.
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DOI：
10.1002/ece3.6742
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发表时间：
2020-10
影响因子：
2.6
通讯作者：
Spurgin LG
中科院分区：
文献类型：
--
作者：
Lewis RC;Pointer MD;Friend LA;Vasudeva R;Bemrose J;Sutter A;Gage MJG;Spurgin LG
一妻多夫制，即雌性与一个以上的雄性交配，理论上在新栖息地的成功殖民中发挥着重要作用。除了性选择可能带来的好处外，即使是温和的一妻多夫制也可以通过防止近亲繁殖和减少与不相容或不育的雄性交配的成本来促进殖民。在这里，我们测量了在实验创始人事件进入更高温度制度后，轻度一妻多夫对种群生存力和生殖适应性的重要性。使用模型甲虫赤拟谷盗（Tribolium castaneum）的殖民实验，其中女性可以在单次交配后产生长达140天的后代，我们使用单一女性建立了100多个重复种群，这些女性有机会与一个或两个男性交配，然后跟踪其随后的种群动态。在10代的种群生存能力和适应性之后，我们发现，与一夫一妻制女性（34%）相比，女性与两个男性（9%）交配的机会所建立的种群的灭绝率显着降低。此外，与一夫一妻制建立的群体相比，由有机会储存来自两个不同男性的精子的女性建立的群体在殖民化后显示出两倍的中位生产力。值得注意的是，我们确定了双重交配对殖民后种群的短期和长期益处，结果表明，一妻多夫制既可以通过创始人事件防止与不相容的雄性交配，又可以减少近亲繁殖抑郁症，因为殖民进行了10代。因此，我们的研究结果表明，即使是轻微的一妻多夫制也能为殖民种群提供生殖和遗传方面的好处。我们进行了一个进化实验来验证一妻多夫制可以使种群成功地殖民新环境的假设。我们发现，由一妻多夫制雌性建立的种群比由一夫一妻制雌性建立的种群灭绝的可能性更小，而且规模更大。
Polyandry, when females mate with more than one male, is theorised to play an important role in successful colonisation of new habitats. In addition to possible benefits from sexual selection, even mild polyandry could facilitate colonisation by protecting against inbreeding and reducing the costs of mating with incompatible or infertile males. Here, we measure the importance of mild polyandry for population viability and reproductive fitness following experimental founder events into a higher‐temperature regime. Using colonisation experiments with the model beetle Tribolium castaneum, in which females can produce offspring for up to 140 days following a single mating, we founded more than 100 replicate populations using single females that had been given the opportunity to mate with either one or two males and then tracked their subsequent population dynamics. Following population viability and fitness across 10 generations, we found that extinction rates were significantly lower in populations founded by females given polyandrous opportunities to mate with two males (9%) compared to populations founded by monogamous females (34%). In addition, populations founded by females that had been provided with opportunities to store sperm from two different males showed double the median productivity following colonisation compared to monogamous‐founded populations. Notably, we identified short‐term and longer‐term benefits to post‐colonisation populations from double‐mating, with results suggesting that polyandry acts to both protect against mating with incompatible males through the founder event, and reduce inbreeding depression as the colonisation proceeds for 10 generations. Our results therefore show that even mild polyandry provides both reproductive and genetic benefits for colonising populations. We performed an evolution experiment to test the hypothesis that polyandry can enable populations to successfully colonise new environments. We found that populations founded by polyandrous females were less likely to go extinct and grew larger in size than those founded by monogamous females.
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影响因子：
5
作者：
Godwin JL;Spurgin LG;Michalczyk Ł;Martin OY;Lumley AJ;Chapman T;Gage MJG
通讯作者：
Gage MJG
影响因子：
2.2
作者：
Fournier, David A.;Skaug, Hans J.;Sibert, John
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Sibert, John
DOI：
10.1098/rspb.2010.0514
发表时间：
2010-11-22
影响因子：
4.7
作者：
Michalczyk, Lukasz;Martin, Oliver Y.;Gage, Matthew J. G.
通讯作者：
Gage, Matthew J. G.
DOI：
10.1098/rspb.2007.0926
发表时间：
2007-11-22
影响因子：
4.7
作者：
Cornell, Stephen J.;Tregenza, Tom
通讯作者：
Tregenza, Tom
DOI：
10.1098/rspb.2018.0303
发表时间：
2018-04-25
影响因子：
4.7
作者：
Parrett, Jonathan M.;Knell, Robert J.
通讯作者：
Knell, Robert J.