野生植物Arabidopsis thaliana的现象学的遗传变异
Victoria L DeLeo1, David L Des Marais2, Thomas E Juenger3
1Department of Biology, Pennsylvania State University.
bioRxiv : the preprint server for biology
|September 16, 2024
概括
来自受控研究的植物现象学的遗传变异很弱地预测了野生的时间. 虽然实验性开花时间与起源相关,但当地的野生变异表明高可塑性,而不是强大的遗传适应性.
科学领域:
- 植物生物学 植物生物学
- 进化遗传学的进化遗传学
- 生态生态学 生态生态学
背景情况:
- 现象学,或生物事件的时间,是在选择和影响其他特征.
- 植物现象学的高遗传变异存在于受控环境中,具有已知的遗传机制.
- 野生植物种群的现象变异的遗传基础在很大程度上仍未被探索.
研究的目的:
- 调查野生阿拉比多普西斯塔利亚纳种群对现象变异的遗传贡献.
- 为了确定受控实验中发芽和开花时间的遗传变异是否能预测现场现象学.
- 评估实验现象学数据与自然采集日期之间的关系.
主要方法:
- 从野外收集的自然同源的阿拉比多普西斯塔利亚纳.
- 合成的后裔来自野生加入的杂交线.
- 将野生采集日期与受控环境研究中的实验数据进行比较 (新增2项,发表155项).
- 使用光热单位来测量采集日期.
- 从草药馆收藏中估计的野生开花时间.
主要成果:
- 来自受控实验的现象学的遗传变异弱但显著预测了野生采集日期.
- 试验花期繁殖值与原产地野生花期相关联.
- 区域内野生采集日期的局部变异并不能通过实验性遗传变异来解释.
- 建议在小规模的环境梯度中具有高可塑性.
结论:
- 控制环境的遗传变异为野生植物现象学提供了有限的预测能力.
- 野生现象学变异可能更多是由可塑性驱动的,而不是在小尺度上强大的遗传适应.
- 在自然种群中观察到的低遗传性可能表明强烈的选择或长时间的适应和遗传的出现.
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