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一个基因的模块化变异构成融合的羽毛颜色

Dave Lutgen^1,2,3, Valentina Peona^2,4, Madeline A Chase²

¹Division of Evolutionary Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.

Science (New York, N.Y.)

|October 16, 2025

概括

基因组变异重组驱动了表型多样性. 在小麦中,收的羽毛颜色进化是来自agouti信号蛋白 (ASIP) 位点的内向变化,揭示了单一结构中的进化轨迹.

科学领域:

进化生物学
遗传学
鸟类学

背景情况:

基因组变异重组有助于表型多样化.
了解这一过程的进化路径及其遗传基础是有限的.

研究的目的:

研究小麦的融合羽毛颜色演变.
检查内进基因变异和agouti信号蛋白 (ASIP) 位点的作用.
阐明遗传架构与进化轨迹之间的相互作用.

主要方法:

对小麦的基因组变异和羽毛颜色演变的分析.
在ASIP位点内发现进化遗传元素.
稳定同位素分析以推断食物.

主要成果:

小麦的融合羽毛颜色进化是由一个涉及ASIP的单一结构控制的.
一个可转移元素的插入和相关变异产生了与食相关的跨特异性喉颜色多态性.
监管ASIP变异的同步导致一个物种的地幔颜色趋同;属级的趋同需要新的变异.

结论:

进化轨迹可以从单一结构中的进化变化中产生.
通过模块化的内向变化,ASIP位点在融合色彩进化中起着至关重要的作用.
进化和新型遗传变异都促进了小麦种类的表型多样化.

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