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Genetic structure in chloroplast and nuclear microsatellites in R osa rugosa around sea straits in northern J apan
Author(s) -
Nagamitsu Teruyoshi
Publication year - 2017
Publication title -
plant species biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 36
eISSN - 1442-1984
pISSN - 0913-557X
DOI - 10.1111/1442-1984.12167
Subject(s) - rugosa , genetic structure , biology , introgression , gene flow , microsatellite , ecotype , isolation by distance , biological dispersal , botany , phylogeography , chloroplast dna , chloroplast , genetic variation , gene , phylogenetic tree , genetics , allele , population , demography , sociology
Sea‐strait geological history and seawater dispersal patterns can affect the genetic structure of coastal plants. We investigated microsatellite (simple sequence repeat, SSR ) variations in chloroplast (cp) and nuclear (n) DNA of the coastal shrub R osa rugosa , native to northeastern A sia, and three species closely related to it. In northern J apan, we sampled R. rugosa along coasts around the S oya and T sugaru straits with different histories of the Q uaternary land formation as a result of different water depths. Both cp SSR and n SSR variations suggest rare hybridization between R . rugosa and the closely related species. Variations in one of two cp SSR s showed genetic differentiation between eastern and western H okkaido. This genetic structure may result from introgression from R. davurica in eastern H okkaido and/or isolation between the eastern and western coastlines of H okkaido as a result of the Q uaternary land formation in the S oya S trait. On the other hand, variations in 10 n SSR s were geographically homogeneous with weak isolation by distance along coastlines. These results suggest that extensive gene flow has been homogenizing the genetic structure of R . rugosa in northern J apan.