在青少年棕鱼内生育的性别特异性影响
Jonas Bylemans1,2, Lucas Marques da Cunha1, Sonia Sarmiento Cabello1
1Department of Ecology and Evolution, Biophore, University of Lausanne, Lausanne, Switzerland.
Molecular ecology
|February 16, 2024
概括
亲生繁殖抑郁症对雌性鱼的生长的影响比雄性更大,导致雌性鱼在第一个夏天变小. 这突显了在早期发育过程中内生繁殖对性别特异性的影响.
科学领域:
- 进化生物学 进化生物学
- 人口遗传学 人口遗传学
- 保护遗传学 保护遗传学
背景情况:
- 亲生生殖抑郁症,随着亲生生殖的增加而减少的健康状况,通常预计在压力下会更高.
- 预计性选择和相关的压力因素会导致男性比女性更严重的内交抑郁症.
- 然而,特定于性别的生命史特征可以改变这种模式,特别是在早期发育过程中.
研究的目的:
- 调查棕鱼 (Salmo trutta) 在早期发育期间内生抑郁症的性别特异性.
- 为了确定近亲繁殖是否会在雄性鱼和雌性鱼之间不同地影响幼的生长.
- 评估自然种群典型的亲生繁殖系数的影响.
主要方法:
- 一个受控的繁殖设计,使用来自野生棕鱼的配体来创建60个全兄弟姐妹家庭.
- 全基因组重新排序以计算每个家庭的亲属关系和预期的内生系数.
- 在野外6个月后,对未成年后代进行抽样,以测量生长和确定遗传性别.
主要成果:
- 青春期雌性生长与增加的内生系数有负相关性.
- 在近亲繁殖系数和雄性青少年生长之间没有发现显著的关系.
- 平均而言,由于性别特异性近亲繁殖抑郁症,女性在第一个夏天结束时比男性要小.
结论:
- 亲生繁殖抑郁症在两性之间可能表现不同,在棕鱼的早期发育过程中,它会更严重地影响雌性生长.
- 生活史上的差异,例如女性早期的淋巴腺发育,可能会导致这些性别特异性影响.
- 了解性别特异性近亲繁殖抑郁症对于预测人口生存能力和告知保护策略至关重要.
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