Unlocking the secret diversity of Anadenanthera: insights from molecular genetics of four evolving species

IF 2.3 2区生物学 Q2 PLANT SCIENCES

Botanical Journal of the Linnean Society Pub Date : 2023-09-15 DOI:10.1093/botlinnean/boad037

Érica Mangaravite, Thamyres Cardoso da Silveira, Christina Cleo Vinson, Marcelo Leandro Bueno, Roberta dos Santos Silva, Maria Antonia Carniello, Joseph W Veldman, Magali Gonçalves Garcia, Luiz Orlando de Oliveira

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Abstract

Abstract The understanding of genetic diversity and evolutionary relationships within the genus Anadenanthera Speg. (Fabaceae) is limited. Brenan’s classification recognized four species, but Altschul’s classification currently recognizes only two species, each with two varieties. Both classifications were based solely on morphology. We analysed molecular data from 283 specimens using 12 SSRs and 186 specimens using ITS sequence data. The results showed that neither SSR-based genotyping nor ITS-based phylogeny supported Altschul’s classification. Instead, they provided evidence of four reproductively isolated taxa and a single clade corresponding to one of Altschul’s varieties. Additionally, ecological niche modelling (ENM) investigated the influence of past climate on the geographic distribution of Anadenanthera. The ENM results suggest that the ‘varieties’ may have occupied different regions of South America with distinct paleoclimates. On the basis of these findings, the authors suggest recognizing four species, as per Brenan’s original classification.

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解开Anadenanthera的秘密多样性:来自四个进化物种的分子遗传学见解

摘要:对Anadenanthera Speg属遗传多样性和进化关系的认识。(豆科)是有限的。Brenan的分类识别出了四个物种，但Altschul的分类目前只识别了两个物种，每个物种有两个变种。两种分类都仅仅基于形态学。我们用12个SSRs分析了283个标本的分子数据，用ITS序列数据分析了186个标本的分子数据。结果表明，基于ssr的基因分型和基于its的系统发育都不支持Altschul的分类。相反，他们提供了四个生殖分离的分类群和一个与Altschul的一个变种相对应的单一分支的证据。此外，利用生态位模型(ENM)研究了过去气候对Anadenanthera地理分布的影响。ENM的结果表明，这些“品种”可能占据了南美洲不同地区的不同古气候。在这些发现的基础上，作者建议按照Brenan最初的分类，识别出四个物种。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Botanical Journal of the Linnean Society 生物-植物科学

CiteScore

5.70

自引率

8.30%

发文量

审稿时长

3.5 months

期刊介绍： The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.