在 Gynoxyoid 类 (Senecioneae, Compositae) 中的通用概念和物种多样性
Belen Escobari1,2, Thomas Borsch1, Norbert Kilian1
1Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Berlin 14195, Germany.
PhytoKeys
|October 20, 2023
概括
这项研究使用族系学重新评估了Gynoxyoid类 (Asteraceae),识别了四个属:Aequatorium,Gynoxys,Paracalia和Paragynoxys. 诺登斯塔米亚是Gynoxys的同义词,改进了安第斯Senecioneae的分类学.
科学领域:
- 植物学和植物分类学.
- 分子遗传学分子遗传学
- 进化生物学 进化生物学
背景情况:
- 在此之前,Gynoxyoid类 (Senecioneae,Asteraceae) 已经通过形态特征来定义,包括五个属:Aequatorium,Gynoxys,Nordenstamia,Paracalia和Paragynoxys.
- 现有的基因界定是基于有限的形态数据和地理分布,Gynoxys是最丰富的物种和广泛分布的属.
- 之前的分类表明,Aequatorium/Paragynoxys (北部) 和Nordenstamia/Paracalia (中部) 的安第斯地区分布不同.
研究的目的:
- 用一个强大的族群基因组框架重新评估Gynoxyoid基层内的通用划分.
- 将形态变异与分子数据整合起来,以建立一个精细的Gynoxyoids分类系统.
- 解决分类学上的不确定性,包括Gynoxys的类遗传性和Nordenstamia的地位.
主要方法:
- 利用一个塑基因组框架来分析Gynoxyoid clade内部的关系.
- 检查了所有gynoxyoid成员的形态变异,开发了一个11个字符的矩阵进行分析.
- 对171个标本 (49个物种) 产生了新的ETS和ITS序列数据,并进行了祖先特征状态推断.
主要成果:
- 基因组学分析显示,Gynoxys是类遗传的,因此需要对基因界限进行修订.
- 形态和分子数据支持四个属的认可:赤道,Gynoxys,Paracalia和Paragynoxys.
- 诺登斯塔米亚属在Gynoxys下同义化,其物种嵌在Gynoxys亚类中;11个名字被新同义化,2个被列型化,8个被转移.
结论:
- 这项研究为Gynoxyoid clade建立了一个新的分类学框架,根据综合证据识别了四种不同的属.
- 提供了精细的通用诊断和描述,以及一个全面的物种级分类学骨干,列出了158个公认的名称和同义词.
- 这一修订阐明了这一重要的安第斯科植物群中的物种的进化关系和分类地位.
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