在Sebastes inermis复合体内的遗传差异和杂交
Diego Deville1, Kentaro Kawai1, Hiroki Fujita2
1Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Hiroshima, Japón.
PeerJ
|November 29, 2023
概括
基因分析证实了三种不同的Sebastes物种,揭示了杂交和潜在的新适应. 基因流动的特异化保持了物种分歧,尽管正在进行的杂交事件.
科学领域:
- 海洋生物学 海洋生物学
- 进化遗传学 进化遗传学
- 规范研究研究 规范研究
背景情况:
- 塞巴斯特斯无力复合体包括三个具有明显生态形态但不完全繁殖隔离的交配物种.
- 假定形态杂交 (PMH) 表明潜在的健身优势,需要对杂交动态进行调查.
研究的目的:
- 评估Sebastes inermis物种复合体内的遗传分歧和杂交.
- 确认杂交的发生及其在产生进化新奇性的作用.
主要方法:
- 利用10个微卫星位置进行遗传分析.
- 测序的线粒体控制区域 (D-循环) 和内部无罗多素 (RH1) 基因.
- 分析了遗传集群,距离,突变和分歧选择的签名.
主要成果:
- 确定了三个不同的基因集群,对应于三个物种.
- 观察到显著的遗传距离和特定物种的RH1基因突变.
- 通过混合祖先确认了杂交,并在两个微观卫星位置中检测到不同的选择.
- 在S. cheni和PMH中发现了非同义的RH1突变,表明视觉感知中的适应性.
结论:
- 尽管正在进行杂交,但遗传分歧仍然存在,这与基因流动的物种化相一致.
- 杂交可能有助于产生新的适应,特别是与视觉感知相关的.
- 这项研究强调了海洋物种的分歧,杂交和适应之间的复杂相互作用.
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