多特异性同步产卵频率对三个 Acropora 种类之间基因导入的影响

IF 2.7 2区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Naoko Isomura, Keisuke Inoha, Akifumi Shimura, Nina Yasuda, Taisei Kikuchi, Kenji Iwao, Seiya Kitanobo, Shun Ohki, Masaya Morita, Hironobu Fukami
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引用次数: 0

摘要

杂交是产生生物遗传多样性的一个进化过程。然而,人们对生殖特征(如产卵同步性和配子兼容性)与导致杂交的引种程度之间的关系知之甚少。造礁珊瑚 Acropora spp.具有复杂的进化历史,其生态学、生活史特征与杂交潜力之间的联系尚存争议。在这里,我们研究了三个物种(Acropora florida、Acropora gemmifera 和 Acropora intermedia)在两个地点杂交时生殖特征之间的关系:日本南部的赤岛和色诸岛。尽管所考察的物种表现出同步产卵和高配子相容性,但产卵同步性和配子相容性与三个物种之间的高杂交率关系不大。基于模型的遗传聚类和基于位点模式频率的单核苷酸多态性测试表明,每个地点的三个物种之间存在遗传混杂。利用 fastsimcoal 进行的人口统计学分析表明,各地三个物种之间的混合可能发生在过去(> 2,000 代)和最近(< 50 代)。此外,这三个物种最近的混合可能与严重的白化事件和种群数量下降有关。主成分分析、结构和 fastsimcoal 显示,A. intermedia 和 A. gemmifera 在 Sesoko 岛的广泛混合发生在最近。因此,必须澄清导致野外杂交的配子相互作用。此外,还需要确定两地之间的联系;不过,我们的研究结果表明,种群波动可能与引种有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of the frequency of multi-specific synchronous spawning on genetic introgression among three Acropora species

Effect of the frequency of multi-specific synchronous spawning on genetic introgression among three Acropora species

Hybridisation is an evolutionary process that generates genetic diversity in organisms. However, the relationship between reproductive features, such as spawning synchronisation and gamete compatibility, and the degree of introgression leading to hybridisation are poorly understood. The reef-building coral Acropora spp. have a complex evolutionary history, and the link between their ecology, life-history traits, and potential to hybridise is disputed. Here, we examined the relationship among the reproductive features involved in the intercrossing of three species, Acropora florida, Acropora gemmifera, and Acropora intermedia, at two sites: Akajima and the Sesoko islands in southern Japan. Although the examined species showed synchronous spawning and high rates of gamete compatibility, spawning synchronisation and gamete compatibility were less strongly associated with high rates of interbreeding among the three species. Model-based genetic clustering and site-pattern frequency-based tests with single nucleotide polymorphisms supported genetic admixture among the three species in each location. Demographic analyses using fastsimcoal implied that the admixture among the three species in each location might have occurred in the past (> 2,000 generations) and recently (< 50 generations). Furthermore, the recent admixture of these three species is potentially associated with heavy bleaching events and population declines. The principal component analysis, structure, and fastsimcoal showed that the extensive admixture of A. intermedia and A. gemmifera on Sesoko Island occurred recently. Therefore, gamete interactions that lead to hybridisation in the field must be clarified. Furthermore, the connectivity between the two locations needs to be identified; however, our results implied that population fluctuations could be associated with introgression.

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来源期刊
Coral Reefs
Coral Reefs 生物-海洋与淡水生物学
CiteScore
6.80
自引率
11.40%
发文量
111
审稿时长
4-8 weeks
期刊介绍: Coral Reefs, the Journal of the International Coral Reef Society, presents multidisciplinary literature across the broad fields of reef studies, publishing analytical and theoretical papers on both modern and ancient reefs. These encourage the search for theories about reef structure and dynamics, and the use of experimentation, modeling, quantification and the applied sciences. Coverage includes such subject areas as population dynamics; community ecology of reef organisms; energy and nutrient flows; biogeochemical cycles; physiology of calcification; reef responses to natural and anthropogenic influences; stress markers in reef organisms; behavioural ecology; sedimentology; diagenesis; reef structure and morphology; evolutionary ecology of the reef biota; palaeoceanography of coral reefs and coral islands; reef management and its underlying disciplines; molecular biology and genetics of coral; aetiology of disease in reef-related organisms; reef responses to global change, and more.
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