一种基因同化季节性颜色模式的基因结构
Karin R L van der Burg1, James J Lewis2,3, Benjamin J Brack2
1Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA. krv32@cornell.edu robertreed@cornell.edu.
Science (New York, N.Y.)
|November 6, 2020
概括
基因同化可以将环境影响的特征固定在蝶中
科学领域:
- 进化生物学
- 遗传学
- 表型可塑性
背景情况:
- 发育性可塑性使得有机体能够根据环境信号产生不同的表型.
- 遗传同化是一种塑性特征被遗传决定的过程,但其机制尚未完全理解.
研究的目的:
- 研究蝶季节性翅膀颜色表型的同化背后的遗传和分子机制.
- 识别涉及环境决定性特征转变为基因固定性特征的基因.
主要方法:
- 研究了一种自然塑性蝶种群 (Junonia coenia).
- 通过选择性繁殖吸收了季节性翅膀颜色表型.
- 进行了内分泌测定和染色质可访问性和形状分析.
- 描述了参与该过程的三个关键基因.
主要成果:
- 确定了三种负责化翅膀颜色表型的基因.
- 证明过渡涉及下游翅膀模式基因的调节基因的选择.
- 没有改变核心环境提示检测机制.
结论:
- 现型可塑性的遗传同化包括对发育基因的调节元素的选择.
- 这种进化途径允许精确的组织特异性适应而不会影响环境传感.
- 提供了环境诱导的变化如何被遗传编码的机制.
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