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在海的温度依赖性性别确定过程中基因表达动态
Mónica Martínez-Pacheco1, Karina Díaz-Barba1, Rosario Pérez-Molina2
1Centro de Ciencias Genómicas, UNAM, CP62210, Cuernavaca, Mexico.
Developmental biology
|June 24, 2024
概括
温度通过影响胚胎中的基因表达来影响海的性别. 特定基因发生快速变化,但生殖腺发育途径具有弹性,对保护工作至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 温度依赖性性别决定 (TSD) 在海中是已知的,但海的遗传因素是鲜为人知的.
- 气候变化正在增加海的筑巢温度,导致海的性别比例偏差和人口偏差.
研究的目的:
- 为了研究奥利夫·里德利海的温度依赖性决定的基因机制.
- 为了确定关键的基因和途径参与温度感应和胚胎阶段的性腺发育.
主要方法:
- 从橄里德利海的胚胎组织 (生殖腺,大脑,肝脏,半脑) 的RNA测序 (RNA-seq) 分析.
- 在热敏期 (第21-26阶段) 中,在产生雄性 (26°C) 和产生雌性 (33°C) 的化温度下,基因表达特征的比较.
- 在双潜性性腺体的温度变化之后进行转录组分析,以确定快速反应基因.
主要成果:
- 化温度主要通过差异性细胞分裂率影响广泛表达的基因,然后影响性腺特异性转录.
- 对温度敏感的基因表现出快速的表达变化,特别是染色体修饰剂 (JARID2,KDM6B),拼接因子 (SRSF5) 和转录调节剂 (THOC2,DDX3X,CBX3).
- 总的来说,性腺特异性通路对温度变化具有弹性,表明复杂的发育命运决定.
结论:
- 温度主要影响全球基因表达模式,然后将其引导到性腺发育中,以确定海的性别.
- 参与温度感应的特定基因反应迅速,但淋巴体分化的整体发育途径是强大的.
- 了解这些遗传途径对于制定保护战略以减轻气候变化对海种群的影响至关重要.
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