植物对称物种化和形态分歧的可能性
Ingrid Olivares1, Søren Faurby2,3, Rodrigo Cámara-Leret1
1Department of Systematic and Evolutionary Botany, University of Zurich, Zurich 8008, Switzerland.
概括
在植物中,同样物种化,即在同一地点出现新物种,是罕见的. 这项研究发现,全方位物种化占主导地位,很少有证据表明,物种化与棕树和针叶树的形态分歧有关.
科学领域:
- 进化生物学 进化生物学
- 植物规格 植物规格
- 生态生态学 生态生态学
背景情况:
- 交配物种化是物种形成的一个有争议的机制.
- 它的频率和与植物形态分歧的联系不明.
- 从动物身上获得的现有证据表明,发生了对应的物种化.
研究的目的:
- 确定植物中占主导地位的地理物种化模式.
- 调查形态差异在植物物种化中的作用.
- 分析姐妹物种间的同情的时空空间动态.
主要方法:
- 对740种棕树和针叶树姐妹物种的地理分布,特征和分歧时间的分析.
- 随着时间的推移,模拟同情的发生率.
- 评估各异性和同性姐妹物种的形态分歧.
主要成果:
- 在棕树和针叶树中,全方位物种化是主要的模式.
- 据估计,共性特异发生在0% (针叶) 到10% (棕) 的事件中.
- 没有证据表明在交或全交手掌中存在形态差异.
- 症状发生率在分类后早期上升,然后下降,这表明早期分歧是关键.
结论:
- 植物物种化动态复杂,与典型的脊椎动物模式不同.
- 植物物种化和形态差异之间的联系很弱.
- 泛基物种化很普遍,早期的同情对其发生至关重要.
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