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在多态常见的遗传基础和腹部颜色的表达
Hans Recknagel1, Henrique G Leitão1, Kathryn R Elmer1
1School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK.
Molecular ecology
|January 25, 2024
概括
遗传变异影响的颜色进化. 研究人员在普通 (Zootoca vivipara) 中发现了与腹部色彩相关的基因,这表明监管变化驱动了这些差异.
科学领域:
- 进化生物学是进化的生物学.
- 遗传学 是一个遗传学.
- 动物颜色动物的颜色.
背景情况:
- 动物颜色是受各种因素影响的关键特征,但其在非模型生物中的遗传基础在很大程度上仍未被探索.
- 了解色彩进化的遗传基础对于识别影响这种跨血统多样性的驱动因素和机制至关重要.
研究的目的:
- 调查雌性常见 (Zootoca vivipara) 卵性和活性生殖模式之间的腹腔颜色差异的遗传基础.
- 确定候选基因和基因组区域,与腹腔色彩和黑色图案的变化相关.
主要方法:
- 用遗传映射和转录组分析来识别候选基因.
- 用基因组重新测序数据来分析遗传变异.
- 在大量雌性的样本中量化了腹腔色彩和黑色图案.
主要成果:
- 卵性和活性普通的雌性表现出明显的腹部色彩和黑色的图案.
- 两个候选基因DGAT2 (胡卜素代谢) 和PMEL (黑色素合成) 与腹腔色差异化有关.
- 候选基因中的固定的编码突变不能完全解释观察到的颜色差异,这表明调节变异的作用.
结论:
- 常见的腹腔色彩演变的特点是灵活性,可能是由调节性遗传变异驱动的.
- 这一发现对了解状动物 (和蛇) 的颜色进化有意义.
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