古代入侵对鱼的衍生生育殖策略演变的潜在贡献
Jana M Flury1,2, Karen Meusemann1, Sebastian Martin1
1Leibniz-Institute for the Analysis of Biodiversity Change (LIB), Museum Koenig Bonn, Bonn, Germany.
Genome biology and evolution
|July 26, 2023
概括
苏拉威西大米鱼的盆腔繁殖的融合进化涉及古老的遗传变异和杂交,而不是血统之间的直接基因流动. 这种生殖策略是独立进化的,是由共同的选择压力塑造的.
科学领域:
- 进化生物学是进化的生物学.
- 遗传学 遗传学 是一个
- 鱼类学 鱼类学 鱼类学
背景情况:
- 父母照顾的转变,就像苏拉威西大米鱼的盆腔繁殖的演变一样,涉及到重要的生命史,行为和形态变化.
- 盆腔繁殖,即雌性在肚子上携带蛋,在远距离相关的Adrianichthys和Oryzias大米鱼的血统中独立进化.
- 之前的研究表明,由于缺乏直接的基因流动,尽管有共同的特征,但独立进化.
研究的目的:
- 调查跨物种基因流动和古老的基因变异在盆腔繁殖的融合进化中的作用.
- 分析基因树-物种-树不一致性,使用多物种凝聚模型和D统计.
- 评估基因流动,不仅在骨盆生殖系之间,还与其他苏拉威西大米鱼系.
主要方法:
- 多种类的凝聚模拟模型.
- 在D-统计分析分析.
- 基因流和内进化的遗传学分析.
主要成果:
- 证实了苏拉威西大米鱼的一般网络式进化模式.
- 没有检测到Adrianichthys和Oryzias的骨盆繁殖系之间没有直接的基因流动.
- 鉴定了Oryzias繁殖的祖先和Poso Oryzias湖的祖先之间的杂交,在盆腔繁殖定量特征位置附近有侵入的迹象.
结论:
- 在Oryzias中,盆腔繁殖的融合进化可能涉及古老的基因变异和杂交,而不是仅仅是de novo进化.
- 这些发现表明,苏拉威斯大米鱼有复杂的进化历史,杂交在适应性特征的传播中发挥了作用.
- 进一步研究骨盆育种的遗传基础是有必要的.
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