Molecular phylogeny reveals the non-monophyly of tribe Yinshanieae (Brassicaceae) and description of a new tribe, Hillielleae

Plant Diversity
Hongliang ChenHang Sun

Abstract

The taxonomic treatment within the unigeneric tribe Yinshanieae (Brassicaceae) is controversial, owing to differences in generic delimitation applied to its species. In this study, sequences from nuclear ITS and chloroplast trnL-F regions were used to test the monophyly of Yinshanieae, while two nuclear markers (ITS, ETS) and four chloroplast markers (trnL-F, trnH-psbA, rps16, rpL32-trnL) were used to elucidate the phylogenetic relationships within the tribe. Using maximum parsimony, maximum likelihood, and Bayesian inference methods, we reconstructed the phylogeny of Brassicaceae and Yinshanieae. The results show that Yinshanieae is not a monophyletic group, with the taxa splitting into two distantly related clades: one clade contains four taxa and falls in Lineage I, whereas the other includes all species previously placed in Hilliella and is embedded in the Expanded Lineage II. The tribe Yinshanieae is redefined, and a new tribe, Hillielleae, is proposed based on combined evidence from molecular phylogeny, morphology, and cytology.

Citations

Feb 9, 2019·The New Phytologist·Lachezar A NikolovMiltos Tsiantis
Oct 13, 2017·Molecular Ecology·Terezie MandákováMartin A Lysak
Mar 16, 2021·Biodiversity Data Journal·Ardath FrancisSara L Martin

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Methods Mentioned

BETA
PCR

Software Mentioned

BioEdit
RA
jModeltest
MrBayes
Sequencher
ML
MULPARS
PAUP

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