季节性环境变化和性变化在鱼中
Réka Gergely1,2, Veronika Bókony3, Zoltan Barta4
1MTA-DE 'Momentum' Ecology, Evolution and Developmental Biology Research Group, Department of Evolutionary Zoology, University of Debrecen, Debrecen, Hungary.
Proceedings. Biological sciences
|July 15, 2025
概括
季节性温度变化可以触发棕色水 (Hydra oligactis) 的性别变化. 生殖过程中的环境变化使基因表达同质化,使得这种淡水鱼有灵活的性表型.
科学领域:
- * 发育生物学 发育生物学
- * 环境科学 环境科学
- * 遗传学 在遗传学方面
背景情况:
- *在许多动物物种中观察到的顺序性双性化,即成年人改变性别,但环境触发因素仍然不明确.
- *气候驱动的性别比例扭曲带来了潜在的灭绝风险,突出了研究环境对性别变化的影响的必要性.
- * 淡水鱼,棕色水 (Hydra oligactis),表现出从无性繁殖到性繁殖的季节性转变.
研究的目的:
- * 调查季节性温度波动对与性别相关的基因表达的影响.
- * 了解Hydra oligactis.在环境线索的反应中发生性别变化的机制.
- * 探索生命阶段过渡和基因表达模式之间的关系.
主要方法:
- * 对Hydra oligactis种群经历季节性温度变化的基因表达的分析.
- * 性繁殖和无性繁殖个体之间的转录组资料的比较.
- * 观察性繁殖后克隆后代的性别转变率.
主要成果:
- * 季节性温度下降导致Hydra oligactis的性繁殖.
- *在性繁殖后的克隆后代中观察到高比例的女性到男性的过渡.
- * 发生性伴生体生产的男性和女性的基因表达特征高度差异化,特别是在与细胞分化和性伴生有关的基因中.
- *来自雄性和雌性菌株的无性个体在性繁殖后显示出几乎相同的转录组.
结论:
- * 季节性环境变化和相关的生命阶段过渡使Hydra oligactis的基因表达同质化.
- *这些环境变化有助于在基因稳定的菌株中出现替代性表型.
- *了解这些机制对于预测物种对气候变化和潜在灭绝风险的反应至关重要.
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