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Phylogenetic relationship of Clauseneae (Rutaceae) inferred from plastid and nuclear DNA data and taxonomic implication for some major taxa
Author(s) -
Mou FengJuan,
Tu Tie-Yao,
Chen Yi-Zhang,
Zhang Dian-Xiang
Publication year - 2018
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/njb.01552
Subject(s) - biology , murraya , clade , monophyly , polyphyly , subfamily , tribe , taxon , molecular phylogenetics , phylogenetic tree , zoology , evolutionary biology , botany , genetics , sociology , anthropology , gene
Using sequences of the nuclear ribosomal ITS region as well as the chloroplast DNA trn L‐ trn F and atp B‐ rbc L regions, this study aims to provide further insight into the phylogenetic relationships within Clauseneae and its relationship to Citreae (Rutaceae). Using maximum likelihood (ML) and Bayesian inference (BI), we reconstructed the phylogeny of Clauseneae based on trn L‐F, atp B‐ rbc L and ITS sequences. Our data matrix contained 91 accessions, representing 72 species and varieties from 31 genera and two outgroups, including new and extensive sampling of species and varieties representing four genera in the tribe Clauseneae. In the subfamily Aurantioideae, six major clades were resolved with strong support: 1) Micromelum clade: Micromelum ; 2) Glycosmis clade: Glycosmis ; 3) Bergera clade: Murraya sect. Bergera ; 4) Clausena clade: Clausena ; 5) Murraya clade: Murraya sect. Murraya + Merrillia ; 6) Citreae clade: Citreae. Micromelum , Glycosmis , Clausena and Merrillia were confirmed as monophyletic. In contrast, Murraya s.l. was reconstructed as polyphyletic. Murraya sect. Bergera clustered with Clausena while Murraya sect. Murraya and Merrillia together formed a clade that is sister to the tribe Citreae. All members from Citreae were clustered into a natural group. The genus Micromelum was found to be primitive in this subfamily and more close to Glycosmis . Based on the phylogeny and morphological characters, we discuss the taxonomy of some members of Clauseneae and conclude that the current tribal and generic classification need further revision.