首页|Central Asia revealed as a key area in evolution of Eremurus(Asphodelaceae)

Central Asia revealed as a key area in evolution of Eremurus(Asphodelaceae)

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Eremurus was described at the beginning of the 19th century.However,due to limited sampling and the small number of gene markers to date,its phylogeny and evolution are largely unknown.In this study,we analyzed plastomes from 27 species belonging to 2 subgenera and 3 sections of Eremurus,which are found in Central Asia(its center of diversity)and China.We also analyzed nuclear DNA ITS of 33 species,encompassing all subgenera and sections of the genus in Central Asia,southwest Asia and China.Our findings revealed that the genus was monophyletic,although both subgenera Eremurus and Henningia were found to be paraphyletic.Both plastome and nrDNA-based phylogenetic trees had three clades that did not reflect the current taxonomy of the genus.Our biogeographical and time-calibrated trees suggest that Eremurus originated in the ancient Tethyan area in the second half of the Eocene.Diversification of Eremurus occurred from the early Oligocene to the late Miocene.Paratethys Sea retreat and several orogenetic events,such as the progressive uplift of the Qinghai-Tibet Plateau and surrounding mountain belts(Altai,Pamir,Tian Shan),caused serious topographic and climate(aridification)changes in Central Asia that may have triggered a split of clades and speciation.In this transformed Central Asia,speciation proceeded rapidly driven mainly by vicariance caused by numerous mountain chains and specialization to a variety of climatic,topographic and soil conditions that exist in this region.

AsphodelaceaeAsphodeloideaePlastomeCentral AsiaQinghai-Tibet Plateau

Dilmurod Makhmudjanov、Sergei Volis、Ziyoviddin Yusupov、Inom Juramurodov、Komiljon Tojibaev、Tao Deng、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,Yunnan,China

Yunnan International Joint Laboratory for Biodiversity of Central Asia,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,Yunnan,China

Institute of Botany,Academy Sciences of Uzbekistan,Tashkent 100125,Uzbekistan

University of Chinese Academy of Sciences,Beijing 100864,China

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Key Projects of the Joint Fund of the National Natural Science Foundation of ChinaSecond Tibetan Plateau Scientific Expedition and Research(STEP)programStrategic Priority Research Program of the Chinese Academy of SciencesInternational Partnership Program of the Chinese Academy of Sciencesstate research project'Taxonomic revision of polymorphic plant families of the flora of Uzbekistan'State Programs for the years 2021-2025'Grid mapping of the flora of Uzbekistan'

U23A201492019QZKK0502XDA20050203151853KYSB20180009FZ-20200929321

2024

10.1016/j.pld.2023.08.004

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2024.46(3)