对不同父母的逆交产生了两种不同的杂交物种
Donglei Wang1, Yongshuai Sun2, Weixiao Lei3
1Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, PR China.
Heredity
|June 1, 2023
概括
重复的同质杂交物种化 (HHS) 事件是罕见的. 这项研究揭示了两种不同的杉物种,Picea brachytyla和Picea purpurea,通过不同的逆交事件从相同的祖先杂交血统中产生.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 植物学 植物学
背景情况:
- 同类杂交物种化 (HHS) 是一个重要的进化机制.
- 在针叶树中,涉及同一家长物种的重复HHS事件非常罕见.
- 杉科 (Picea) 的进化史是复杂的,涉及有网状物进化.
研究的目的:
- 通过使用种群转录组数据,研究Picea brachytyla中对比和同质杂交物种化 (HHS) 事件.
- 为了澄清Picea brachytyla和Picea likiangensis物种复合体 (PLSC) 内的遗传关系.
- 为了确定导致Picea brachytyla和Picea purpurea的亲属物种和进化途径.
主要方法:
- 人口转录组数据分析.
- 人类遗传学分析
- 光时代的建模
主要成果:
- 两种Picea brachytyla的谱系表现出非姐妹关系,其中一个谱系嵌在Picea likiangensis物种综合体 (PLSC) 内.
- 棕树 (Picea brachytyla sensu stricto (s.s.) 和紫树 (Picea purpurea) 起源于HHS,涉及已灭绝的杂交血统及其亲属物种,Picea wilsonii和PLSC的祖先.
- 这项研究提供了通过差异逆交事件从同一灭绝的杂交血统中产生的两个不同的杂交物种的第一个记录实例.
结论:
- 这些发现表明,比以前理解的更复杂的同质杂交物种化事件发生在杉科属中.
- 网状动物的进化在松树物种的多样化中起着至关重要的作用.
- 这项研究重新界定了Picea likiangensis物种复合体,并澄清了Picea brachytyla s.s.和Picea purpurea的进化起源.
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