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Unravelling the Habenaria repens (Orchidaceae) complex in Brazil: a biosystematic and molecular phylogenetic approach
Botanical Journal of the Linnean Society ( IF 2.4 ) Pub Date : 2021-02-05 , DOI: 10.1093/botlinnean/boab022
Bruna Ladeira Lau 1 , João Aguiar Nogueira Batista 1 , Antônio Massensini Junior 1 , W Mark Whitten 2 , Eduardo Leite Borba 1
Affiliation  

Habenaria repens (Orchidaceae) represents a species complex distributed from the southern USA to northern Argentina, including several morphological variants, here referred to as morphotypes. To investigate and clarify the morphological and genetic relationships between these morphotypes and resolve the taxonomy of the complex, we applied a biosystematic multi-population approach using molecular phylogenetic, morphometric and population genetics analyses in the group. We sampled 31 (phylogenetic analyses) and 20 (morphometric and microsatellite analyses) populations of Habenaria aranifera and H. repens from Brazil and the USA, including six morphotypes of H. repens. Bayesian and maximum parsimony phylogenetic analyses of nuclear ribosomal (ITS and ETS) and plastid (matK, trnK and rps16-trnK) markers revealed that the complex is polyphyletic, subdivided into three distantly related clades. Population genetic analyses using microsatellites showed a remarkably similar structure to the phylogenetic analyses, but both were different from the morphometric analyses of floral characters, indicating cases of diversification and convergence, probably due to pollination processes. Habenaria aranifera is embedded in a paraphyletic and polymorphic H. repens with a broad geographical distribution and other attributes of an ochlospecies, probably constituting a progenitor–derivative pair. Our results support the recognition of H. aranifera, H. repens and three or four new species.

中文翻译:

在巴西解开 Habenaria repens(兰科)复合体:一种生物系统和分子系统发育方法

Habenaria repens(兰科)代表从美国南部到阿根廷北部分布的物种复合体,包括几种形态变异,这里称为形态类型。为了研究和阐明这些形态类型之间的形态和遗传关系并解决复合物的分类问题,我们应用了生物系统多种群方法,在该组中使用分子系统发育、形态测量和种群遗传学分析。我们从巴西和美国采集了 31 个(系统发育分析)和 20 个(形态测量和微卫星分析)Habenaria aranifera 和 H. repens 种群,包括六种 H. repens 形态型。核核糖体(ITS 和 ETS)和质体(matK、trnK 和 rps16-trnK)标记的贝叶斯和最大简约系统发育分析表明,该复合物是多系的,细分为三个远亲相关的分支。使用微卫星的群体遗传分析显示出与系统发育分析非常相似的结构,但两者都不同于花性状的形态分析,表明可能由于授粉过程而出现多样化和趋同的情况。Habenaria aranifera 嵌入在一个并系和多态的 H. repens 中,具有广泛的地理分布和 ochlospecies 的其他属性,可能构成一个祖 - 衍生物对。我们的结果支持识别 H. aranifera、H. repens 和三个或四个新物种。但两者都不同于花卉特征的形态分析,表明可能是由于授粉过程造成的多样化和趋同的情况。Habenaria aranifera 嵌入在一个并系和多态的 H. repens 中,具有广泛的地理分布和 ochlospecies 的其他属性,可能构成一个祖 - 衍生物对。我们的结果支持识别 H. aranifera、H. repens 和三个或四个新物种。但两者都不同于花卉特征的形态分析,表明可能是由于授粉过程造成的多样化和趋同的情况。Habenaria aranifera 嵌入在一个并系和多态的 H. repens 中,具有广泛的地理分布和 ochlospecies 的其他属性,可能构成一个祖 - 衍生物对。我们的结果支持识别 H. aranifera、H. repens 和三个或四个新物种。
更新日期:2021-02-05
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