在50年后引入的Mysis中缺乏遗传多样性和最小的适应性进化分歧
Rebecca G Cheek1,2, Jessica F McLaughlin3, Maybellene P Gamboa4
1Department of Biology Colorado State University Fort Collins Colorado USA.
Evolutionary applications
|January 29, 2024
概括
引入的鱼 (Mysis diluviana) 显示出与它们的源种群的遗传分歧. 尽管遗传多样性很低,但这些种群适应了科罗拉多州的新环境,证明了进化在行动中.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
背景情况:
- 引入的物种为研究新息地进化和适应提供了模型.
- (Mysis diluviana) 于20世纪50年代从明尼苏达州引入科罗拉多湖,以支持鱼种群.
- 详细的引入记录允许在已知的时间框架内测试进化分歧.
研究的目的:
- 在引入的Mysis diluviana种群中调查遗传多样性模式.
- 测试源 (明尼苏达州) 和引入 (科罗拉多州) 种群之间的遗传差异.
- 在引入的Mysis diluviana种群中发现适应性进化的证据.
主要方法:
- 利用减少表示的基因组数据来分析遗传多样性.
- 应用FST异常值和环境关联分析来检测选择.
- 采用人口模型推断人口历史和杂交事件.
主要成果:
- 在所有研究的种群中观察到非常低的遗传多样性.
- 发现了明尼苏达源和科罗拉多引入种群之间的遗传分歧的证据.
- 鉴定出多个遗传位置,显示出与海拔和湖泊深度相关的选择特征,尽管整体多样性较低.
- 人口建模表明,粗水库种群的杂交是源不明的.
结论:
- 引入的Mysis diluviana种群表现出基因分歧和适应新环境,即使基因变异有限.
- 遗传分析可以作为一个法医工具来追踪入侵物种的起源.
- 引入物种的成功不能仅仅受到最初的遗传变异的限制.
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