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遗传学揭示了古代杂交和差异多样化的模式,这些模式有助于柳树,树和近亲的遗传冲突
Brian J Sanderson1,2, Diksha Gambhir1, Guanqiao Feng1
1Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409-3131, USA.
Systematic biology
|July 14, 2023
概括
杂交和快速多样化解释了Salix (柳树) 和Populus (树) 中的物种多样性. 古代和最近的杂交事件显著塑造了这些重要的植物属的进化历史和物种丰富性.
科学领域:
- 植物进化生物学 植物进化生物学
- 人类遗传学 是一个学科.
- 分子进化是分子进化的过程.
背景情况:
- Salicaceae家族,包括 Salix (柳) 和 Populus (),具有重要的经济,生态和科学重要性.
- 之前试图将Salix亚属分类的尝试一直具有挑战性,有证据表明某些类别内的快速多样化.
- 了解Salix和Populus的进化历史和物种多样性的来源至关重要,但仍然不完整.
研究的目的:
- 通过目标序列捕获来研究 Salix 和 Populus 的进化历史.
- 解决遗传学冲突,了解这些属内的物种多样性的驱动因素.
- 为了澄清 Salix 亚属和部分之间的关系,特别是 Vetrix 和 Chamaetia 类.
主要方法:
- 利用向序列捕获获取787个基因区域进行遗传学分析.
- 在综合基因数据集的基础上构建了家族遗传学假设.
- 采用了f分支分析来检测杂交事件,并评估了家族遗传冲突和不完整的血统分类.
主要成果:
- 鉴定了基因区域之间广泛的遗传学冲突,表明复杂的进化过程.
- 证实了Salix中一些现有的亚属关系,同时揭示了其他类型的多类性.
- 在Salix和Populus中检测到许多古代和近期杂交的实例,这有助于基因树的不一致性和物种多样化.
结论:
- 杂交在Salix和Populus的多样化和当前物种多样性中发挥了重要作用.
- 在 Salix 的 Vetrix-Chamaetia 类中观察到快速增加的多样化率,这可能与不完整的血统分类增加有关.
- 复杂的进化历史,以杂交和快速辐射为标志,凸显了 Salix 分类的挑战,并突出了推动 Salicaceae 多样性的关键因素.
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