基因组资源用于对有义务的鸟类繁殖寄生虫的比较分析
Rachel A Carroll1, Edward S Ricemeyer1,2, LaDeana W Hillier3
1Division of Animal Sciences, Bond Life Sciences Center, University of Missouri, Columbia, MO, USA.
bioRxiv : the preprint server for biology
|October 1, 2025
概括
鸟类的融合进化表明自然选择如何独立地驱动类似的特征,如繁殖寄生虫. 新的鸟类基因组揭示了这种罕见的生命历史策略的遗传基础.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 鸟类学 鸟类学是一门学科.
背景情况:
- 融合进化证明了自然选择的适应能力,有义务的繁殖寄生虫在七个鸟类血统中独立进化.
- 繁殖寄生和相关特征 (失去父母的照顾,交配系统的转变) 的遗传基础在很大程度上是未知的.
研究的目的:
- 为繁殖寄生鸟及其外组生成高质量的基因组组合.
- 调查繁殖寄生虫进化的遗传和基因组基础.
主要方法:
- 使用长读测序生成了九个染色体级基因组组件.
- 为分析染色体合成和基因注释而构建了类基层对齐.
- 定义的跨物种的ortholog参考集.
主要成果:
- 创建了十个繁殖寄生虫和八个外组鸟类基因组的目录,具有高度完整性 (>97%).
- 揭示了染色体合成的变异,并提供了改进的基因注释.
- 对繁殖寄生虫的独立起源进行了精细的估计,对于一些血统来说可以追溯到3000万年前.
结论:
- 生成的基因组资源为研究繁殖寄生虫的遗传基础提供了基础.
- 未来的研究可以探索与失去父母照顾,交配系统和与宿主共同进化的相关适应.
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