首页|Pleistocene glaciation advances the cryptic speciation of Stellera chamaejasme L.in a major biodiversity hotspot

Pleistocene glaciation advances the cryptic speciation of Stellera chamaejasme L.in a major biodiversity hotspot

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The mountains of Southwest China comprise a sig-nificant large mountain range and biodiversity hot-spot imperiled by global climate change.The high species diversity in this mountain system has long been attributed to a complex set of factors,and re-cent large-scale macroevolutionary investigations have placed a broad timeline on plant diversification that stretches from 10 million years ago(Mya)to the present.Despite our increasing understanding of the temporal mode of speciation,finer-scale population-level investigations are lacking to better refine these temporal trends and illuminate the abiotic and biotic influences of cryptic speciation.This is largely due to the dearth of organismal sampling among closely related species and populations,spanning the in-credible size and topological heterogeneity of this region.Our study dives into these evolutionary dy-namics of speciation using genomic and eco-morphological data of Stellera chamaejasme L.We identified four previously unrecognized cryptic spe-cies having indistinct morphological traits and large metapopulation of evolving lineages,suggesting a more recent diversification(～2.67-0.90 Mya),largely influenced by Pleistocene glaciation and biotic fac-tors.These factors likely influenced allopatric spe-ciation and advocated cyclical warming-cooling episodes along elevational gradients during the Pleistocene.The study refines the evolutionary timeline to be much younger than previously im-plicated and raises the concern that projected future warming may influence the alpine species diversity,necessitating increased conservation efforts.

cryptic speciationglacial-interglacialHengduan Mountainsnorth-south migrationStellera chamaejasme

Santosh Kumar Rana、Hum Kala Rana、Jacob B.Landis、Tianhui Kuang、Juntong Chen、Hengchang Wang、Tao Deng、Charles C.Davis、Hang Sun

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CAS Key Laboratory for Plant Diversity and Biogeography of East Asia,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China

Arkansas Biosciences Institute,Arkansas State University,Jonesboro,Arkansas 72401,USA

School of Integrative Plant Science,Section of Plant Biology and the L.H.Bailey Hortorium,Cornell University,Ithaca,New York 14853,USA

BTI Computational Biology Center,Boyce Thompson Institute,Ithaca,New York 14853,USA

CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture,Chinese Academy of Sciences,Wuhan Botanical Garden,Wuhan 430074,China

Department of Organismic and Evolutionary Biology,Herbaria,Harvard University,Cambridge,Massachusetts 02138,USA

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Second Tibetan Plateau Scientific Expedition and Research(STEP)programKey Projects of the Joint Fund of the National Natural Science Foundation of ChinaResearch Fund for International Young Scientists of the National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYoung Academic and Technical Leader Raising Foundation of Yunnan ProvinceInternational Association for Plant Taxonomy(IAPT)Research grantthe"CAS President's International Fellowship Initiative"(PIFI)postdoctoral fellowship

2019QZKK0502U23A2014932150410356323220062019HB0394210648062021PB0034

2024

10.1111/jipb.13663

植物学报(英文版)
中国植物学会

植物学报(英文版)

CSTPCD
影响因子：0.921
ISSN：1672-9072
年,卷(期)：2024.66(6)
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