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Genetically-and environmentally-dependent processes drive interspecific and intraspecific divergence in the Chinese relict endemic genus Dipteronia

引用

Plant Diversity 2024年第5期46卷 585-599页

作者： Tao Zhou Xiaodan Chen Jordi López-Pujol Guoqing Bai Sonia Herrando-Moraira neus nualart Xiao Zhang Yuemei Zhao Guifang Zhao Key Laboratory of Resource Biology and Biotechnology in Western China(Ministry of Education) College of Life SciencesNorthwest UniversityXi'an 710069China School of Pharmacy Xi'an Jiaotong UniversityXi'an 710061China College of Life Science Shanxi Normal UniversityTaiyuanChina Botanic Institute of Barcelona(IBB) CSIC-CMCNBBarcelona 08038CataloniaSpain Escuela de Ciencias Ambientales Universidad Espíritu Santo(UEES)Samborondón 091650Ecuador Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources Xi'an Botanical Garden of Shaanxi ProvinceXi'an 710061China School of Biological Sciences Guizhou Education UniversityGuiyangChina

China is a hotspot of relict plant species that were once widespread throughout the Northern *** research has demonstrated that the occurrence of long-term stable refugia in the mountainous regions of central and south-western China allowed their persistence through the late Neogene climate *** of these relict lineages is Dipteronia,an oligotypic tree genus with a fossil record extending to the ***,we investigated the genetic variability,demographic dynamics and diversification patterns of the two currently recognized Dipteronia species(Dipteronia sinensis and ***).Molecular data were obtained from 45 populations of Dipteronia by genotyping three cpDNA regions,two single copy nuclear genes and 15 simple sequence repeat *** genetic study was combined with niche comparison analyses on the environmental space,ecological niche modeling,and landscape connectivity *** found that the two Dipteronia species have highly diverged both in genetic and ecological *** the incipient speciation processes that can be observed in ***,the occurrence of long-term stable refugia and,particularly,a dispersal corridor along Daba Shan-west Qinling,likely ensured its genetic and ecological integrity to *** study will not only help us to understand how populations of Dipteronia species responded to the tectonic and climatic changes of the Cenozoic,but also provide insight into how Arcto-Tertiary relict plants in East Asia survived,evolved,and diversified.

关键词： Dipteronia Interspecific/intraspecific divergence Genetic structure Climatic niche divergence Dispersal corridor

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