一个帆船的siphonophore的种群基因组学揭示了在开放的海洋中遗传结构
Samuel H Church1, River B Abedon1, Namrata Ahuja1
1Yale University, Department of Ecology and Evolutionary Biology, 165 Prospect Street, New Haven, CT 06511, USA.
Current biology : CB
|June 20, 2025
概括
这项研究揭示,战人 (Physalia) 不是全球单一的种群,而是至少包括四种不同的物种. 这些物种显示出显著的遗传结构,挑战了以前关于公海混合的假设.
科学领域:
- 海洋生物学 海洋生物学
- 基因组学就是基因组学.
- 公民科学 公民科学
背景情况:
- 开放的海洋被认为是一个高度连接的环境,有机体被假设形成大规模,混合群体.
- 战争之人 (Physalia) 使用其漂浮和顶进行长距离的散播,使其成为研究公海群体连接的模型.
研究的目的:
- 测试一个单一的假设,泛美 (全球混合) 植物群.
- 用遗传和形态数据识别和划分Physalia属内的不同物种.
- 调查与海洋学因素有关的人口结构和连接性.
主要方法:
- 151个Physalia样本的全基因组测序.
- 来自iNaturalist.org的成千上万个公民科学图像的分析,以确定形态和分布.
- 海洋循环建模以将人口结构与环境因素相关联.
主要成果:
- 基因组数据揭示了五个不同的血统,表明了强大的生殖隔离,尽管重叠范围.
- 形态分析确定了四种可识别的形状,与四种遗传系联系在一起.
- 在物种中观察到显著的种群结构,与区域海洋流和风保持一致.
- 至少有四个Physalia物种被确定,包括一个新描述的物种Physalia minuta.
结论:
- 单一的,泛微的Physalia种群的假设被拒绝.
- 植物包括至少四种不同的物种,具有显著的区域人口结构.
- 海洋电流和风在分离基因变异方面发挥着至关重要的作用,即使在高度流动的海洋物种中也是如此.
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