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- Title
Impacts of the Asian interior arid zone on phylogeographic patterns in the eastern Asian flora revealed by two Potamogeton species (Potamogetonaceae): east-west divergence within species and barriers to north-south dispersal.
- Authors
Du, Zhi-Yuan; Wang, Qing-Feng
- Abstract
Cenozoic climatic and geological changes enhanced Asian monsoon activity and interior aridification, which influenced the migration and isolation of temperate species in eastern Asia. However, the impact of the Asian interior arid zone on phylogeographic patterns of aquatic plants is poorly studied. Here, we present a comparative study of two Potamogeton spp. (Potamogetonaceae) using phylogeographic analyses of nuclear and plastid DNA, approximate Bayesian computation of population history and palaeodistribution modelling to infer their evolutionary histories in the neighbouring regions of eastern Asian deserts. Our results suggested that the intensified aridification of inland Asia from the late Miocene onward drove intraspecific divergence in the two species. Potamogeton perfoliatus and P. berchtoldii both diverged into two lineages beside the deserts in north-western and north-eastern China during the Neogene. The two lineages of P. perfoliatus admixed in regions south of the arid zone, with the majority of populations derived from the north-western lineage. In P. berchtoldii, only the north-western lineage was found in regions south of the arid zone. The observed phylogeographic patterns suggest that the vast inland Asian arid zone has important impacts on divergence and dispersal of these species. Our study highlights the influence of the Asian interior aridification in shaping the evolutionary histories of the aquatic flora of eastern Asia.
- Subjects
POTAMOGETON; PHYLOGEOGRAPHY; CLIMATE change; PLANT evolution; NUCLEOTIDE sequence
- Publication
Botanical Journal of the Linnean Society, 2018, Vol 188, Issue 4, p391
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1093/botlinnean/boy061