解读类的进化和生物地理学 Lecanopteris s.s.s
Li-Ju Jiang1, Jing Zhao2, Jia-Guan Wang2
1Gardening and Horticulture Centre, Xishuangbanna Tropic Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China.
Molecular phylogenetics and evolution
|September 15, 2024
概括
杂交和基因流动显著塑造了东南亚的的多样性. 这项研究揭示了Lecanopteris的复杂进化历史,由气候和地理因素驱动.
科学领域:
- 进化生物学 进化生物学
- 植物系统学 植物系统学
- 生物多样性研究 生物多样性研究
背景情况:
- 东南亚是一个生物多样性热点,拥有多样化的植物 (Polypodiopsida).
- 杂交在中很常见,但它在多样性中的作用需要进一步研究.
- 由于遗传数据有限,在Lecanopteris s.s. (相关) 中的物种划界是有争议的.
研究的目的:
- 为了阐明Lecanopteris s.s.的网状进化历史.
- 研究杂交事件与的多样性之间的关系.
- 整合遗传学,生物地理学和基因组数据,以全面理解.
主要方法:
- 生成并分析了22个塑体和22个转录体.
- 对本地物种和栽培杂交物种进行流细胞计.
- 综合性植物地理重建,基因流推断和基因组大小估计.
主要成果:
- 莱卡诺普特里斯 (Lecanopteris s.s.) 由于扩大的反向重复 (IR) 区域,表现出扩大的塑体大小 (178-187 Kb).
- 传统的'pumila'和'crustacea'群体是过的,有混合化和内进化的证据.
- 显著的细胞核异调表明了大量的基因流动,确定了自然杂交的亲属关系.
结论:
- 莱卡诺普特里斯 (Lecanopteris s.s.) 的进化历史和物种形成受到东南亚古地理和气候动态的影响.
- 分散,杂交和内进是莱卡诺普特里斯s.s.多样化的关键因素.
- 为了解Polypodiaceae亚家族Microsoroideae.ae中的多样化模式提供了一个框架.
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