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重复的多化形成了Lithophragma bolanderi (Saxifragaceae) 的花形态上的差异
Karin Gross1,2,3, Homa Papoli Yazdi2, Elisabeth Schlager3
1Department of Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Norbyvägen, Uppsala 18D, 752 36, Sweden.
概括
多倍体化,即整个基因组的重复,推动了植物的进化. 在*Lithophragma bolanderi*中,重复的多体化和与授粉者的相互作用塑造了其范围内的花多样性.
科学领域:
- 进化生物学是进化的生物学.
- 植物科学 植物科学
- 基因组学就是基因组学.
背景情况:
- 多化是开花植物的一个关键进化机制.
- 在 *Lithophragma bolanderi* 中的花形态多样化受到与 *Greya* 蝶的相互作用的影响.
- 以前的研究表明,共同进化解释了一些花变异,但并非全部.
研究的目的:
- 调查多重多化在塑造花形态多样化中的重复多化作用. *Lithophragma bolanderi*.
- 整合表型和基因组数据以了解进化过程.
- 检查多化,物种相互作用和局部适应之间的相互作用.
主要方法:
- 收集了来自40个种群的1800多名个体的表型和基因组数据.
- 使用流式细胞计量来识别细胞型 (二倍体,四倍体,六倍体等). ) 的情况.
- 进行全基因组再测序和常见花园实验,以评估特征变异和可塑性.
主要成果:
- 确定了细胞型的地理马赛克,其中多体比双体具有更大的花形态变异.
- 基因组数据表明多个自聚化事件和低内向性.
- 实验性多化诱导了表型变化,但局部选择有利于趋同.
结论:
- 重复的多化显著促进了L. bolanderi*的花形态变异.
- 聚化与受粉体驱动的选择的整合塑造了当地多样化.
- 这项研究提供了关于变异性产生过程如何与选择相互作用以推动植物进化的见解.
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