多倍化及其进化影响的影响是由 haplodiploid 黄蜂 Nasonia vitripennis 的遗传多倍性揭示出来的
Kelley Leung1, Louis van de Zande1, Leo W Beukeboom1
1Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands.
PloS one
|November 2, 2023
概括
动物中的多化,比如纳索尼亚黄蜂,可以导致各种健康结果. 这项研究揭示了不同的多体系如何克服遗传挑战,为动物多体进化提供了洞察力.
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
- 动物的多重化多重化.
背景情况:
- 多倍体化在真核生物中很常见,但其在动物中的进化优势尚不清楚.
- 海门体表现出性别特异的体性 (双体雄性,双体雌性),罕见的新多体面临不孕症.
- 寄生虫黄蜂Nasonia vitripennis提供了一个独特的系统来研究可遗传的动物多体化.
研究的目的:
- 为了研究如何克服新聚合体损害,并可能导致动物进化优势.
- 为了比较Nasonia vitripennis中已建立和新生成的多倍体系的健康状况,基因表达和细胞特征.
- 探索成功的多倍体化背后的机制及其对昆虫生物学的影响.
主要方法:
- 对一条长期存在的多倍体线 (白色多倍体线 - WPL) 和一条新的淘汰线 (变压器淘汰线 - tKDL) 的比较分析.
- 评估健康特征,包括男性健康和女性生育能力.
- 测量绝对基因表达,细胞大小和细胞数.
主要成果:
- 在WPL多体中,男性的身体状况很好,但女性的生育能力很低;在tKDL多体中,男性的交配能力受损,但生育能力很高.
- 与tKDL不同的是,WPL多体表现出更大的细胞和减少的细胞数量.
- 基因剂量与性别有关,不论是性,这表明在鸟中存在剂量补偿.
结论:
- 多倍体血统之间的表型变异对于它们的进化成功或失败至关重要.
- 这项研究挑战了关于女鸟生物学的假设,记录了竞争力下降的双体雄性和具有可变适应性的三体雌性.
- 多倍体化成功取决于重复的基因组特征,不同的线条显示不平等的适合二倍体化.
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