10.5061/DRYAD.N5TB2RBXM
Chen, Ya-Ping
0000-0002-7502-1848
Kunming Institute of Botany
Turdimatovich, Turginov
Academy of Sciences Republic of Uzbekistan
Nuraliev, Maxim
Lomonosov Moscow State University
Lazarević, Predrag
University of Belgrade
Drew, Bryan
University of Nebraska at Kearney
Xiang, Chun-Lei
Kunming Institute of Botany
Phylogeny and biogeography of the northern temperate genus Dracocephalum
s.l. (Lamiaceae)
Dryad
dataset
2022
FOS: Biological sciences
2022-03-14T00:00:00Z
2022-03-14T00:00:00Z
en
https://doi.org/10.5281/zenodo.6221274
1205168 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
The northern temperate genus Dracocephalum consists of approximately 70
species mainly distributed in the steppe-desert biomes of Central and West
Asia and the alpine region of the Qinghai-Tibetan Plateau (QTP).
Previous work has shown that Dracocephalum is not monophyletic and might
include Hyssopus and Lallemantia. This study attempts to clarify the
phylogenetic relationships, diversification patterns, and the
biogeographical history of the three genera (defined as
Dracocephalum s.l.). Based on a sampling of 66 taxa comprising more than
80% from extant species of Dracocephalum s.l., morphological, phylogenetic
(maximum parsimony, likelihood, and Bayesian inference based on nuclear
ITS and ETS, plastid rpl32-trnL, trnL-trnF, ycf1, and ycf1-rps15, and two
low-copy nuclear markers AT3G09060 and AT1G09680), molecular dating,
diversification, and ancestral range estimation analyses were carried out.
Our results demonstrate that both Hyssopus and Lallemantia are
embedded within Dracocephalum and nine well-supported clades can be
recognized within Dracocephalum s.l. Analyses of divergence times suggest
that the genus experienced an early rapid radiation during the middle to
late Miocene with major lineages diversifying within a relatively narrow
timescale. Ancestral area reconstruction analyses indicate that
Dracocephalum s.l. originated in Central and West Asia and southern
Siberia, and dispersed from Central and West Asia into the QTP and
adjacent areas twice independently during the Pliocene. The aridification
of the Asian interior possibly promoted the rapid radiation of
Dracocephalum within this region, and the uplift of the QTP appears to
have triggered the dispersal and recent rapid diversification of the genus
in the QTP and adjacent regions. Combining molecular phylogenetic and
morphological evidence, a revised infrageneric classification of
Dracocephalum s.l. is proposed, which recognized nine sections within the
genus.