一个超基因会影响鸟类在早期发育过程中的雄激素度,这种鸟类具有替代的生殖形态
Lina M Giraldo-Deck1, Jasmine L Loveland2, Wolfgang Goymann3
1Research Group Behavioural Genetics and Evolutionary Ecology, Max Planck Institute for Biological Intelligence, Eberhard-Gwinner-Straße, 82319 Seewiesen, Germany; Research Group Evolutionary Physiology, Max Planck Institute for Biological Intelligence, Eberhard-Gwinner-Straße, 82319 Seewiesen, Germany.
Hormones and behavior
|September 29, 2024
概括
年轻 (Calidris pugnax) 的荷尔蒙水平显示出生殖形态之间的明显差异,而不是性别. 这些早期的类固醇变异表明,遗传调节是成年人的行为多样性的基础.
科学领域:
- 进化生物学是进化的生物学.
- 动物行为 动物行为
- 内分泌学 在内分泌学.
背景情况:
- 替代生殖策略往往与显著的表型变异相关.
- 离散的,基因决定的繁殖形态,如鲁夫 (Calidris pugnax) 的那些,提供了对基因型-表型关系的见解.
- 成年RuffMorphs在类固醇激素度上表现出差异,但早期生活模式仍然不清楚.
研究的目的:
- 为了调查在早期发育过程中,ruff繁殖形态和性别之间是否存在丸激素,androstenedione和孕激素度的差异.
- 为了比较这些早期的类固醇形状与成年人的类固醇形状.
- 探索如何调节形态特异性激素变异并促进行为分歧.
主要方法:
- 重复测量循环中的,二和孕激素在和幼.
- 荷尔蒙度平均值,变异和形态和性别之间的偏差的统计比较.
- 少年激素样本与先前已建立的成年人数据的比较.
主要成果:
- 在早期生活中,在ruff morphs之间观察到激素度的显著差异,但在性别之间没有.
- 雄激素度 (和安德罗斯) 在形态之间显示出明显的差异和偏差,尽管平均值没有差异.
- 年轻的羊比成年人表现出较低的雄激素度,在两种生命阶段观察到和雄激素之间的形态特异性关联.
结论:
- 雄激素度的形态特异变异从鲁夫的早期生活中就存在,在成人行为表型之前.
- 这些早期的荷尔蒙差异很可能是由超基因调节的,这有助于繁殖策略的多样化.
- 这些发现支持一种基因支 (自体逆转) 影响激素特征的模型,推动了替代生殖策略的演变.
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