遗传学解开了Apocissus (Vitaceae) 的进化和生物地理的不确定性
Alberto J Coello1, Gabriel Johnson1, Betsy R Jackes2
1Department of Botany, National Museum of Natural History, Smithsonian Institution. 10th St. & Constitution Ave. NW, Washington, D.C. 20560, USA.
Molecular phylogenetics and evolution
|December 23, 2025
概括
第一个家族遗传学研究显示,葡萄家族属Apocissus在白纪晚期从Cissus分离出来. 它的多样化发生在澳大利亚,后来扩散到美洲,Cissus penninervis现在是Apocissus penninervis.
科学领域:
- 植物学 植物学
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 葡萄科 (Vitaceae) 中的一个小属Apocissus,表现出热带洲际断层.
- 虽然以前是Cissus的组成部分,但最近的系谱表明Apocissus很早就分离了,因此需要将其描述为一个新属.
- 阿波基索斯的进化历史和遗传学位置仍然不太清楚.
研究的目的:
- 为了对Apocissus属进行第一个家族遗传学研究.
- 为了阐明Apocissus的进化历史,家族遗传关系和生物地理起源.
- 为了解决Cissus penninervis.的分类学分类.
主要方法:
- 目标丰富的基因组测序1013个核位点和245个Vitaceae的塑性位点.
- 基于连锁和凝聚的家族遗传学分析.
- 使用SNaQ进行杂交评估,使用treePL进行时间校准,使用BioGeoBEARS进行生物地理重建.
主要成果:
- 核遗传学重建证实了Apocissus的单属性及其与Cissus的姐妹关系.
- 这项研究没有支持Apocissus的杂交起源.
- 时间校准表明,在白纪晚期从Cissus分离,在奥利古纪期间在澳大利亚大陆多样化,随后分散到美洲.
- 质体重建表明Cissus penninervis和Apocissus之间存在密切的关系,支持其分类学转移.
结论:
- 据证实,Apocissus是Cissus的独特属姐妹,具有古老的分歧和涉及澳大利亚和美洲的生物地理历史.
- 这些发现支持Cissus penninervis转移到Apocissus,导致新的组合Apocissus penninervis.
- 这项研究为了解维塔家族内Apocissus的演化提供了一个强大的遗传学框架.
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