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Molecular phylogeography and conservation genetics of Sladenia celastrifolia inferred from chloroplast DNA sequence variation
Author(s) -
LU Xi,
CHEN Li,
CHEN YaPing,
PENG Hua
Publication year - 2014
Publication title -
journal of systematics and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.249
H-Index - 46
eISSN - 1759-6831
pISSN - 1674-4918
DOI - 10.1111/jse.12057
Subject(s) - biology , phylogeography , gene flow , chloroplast dna , genetic diversity , haplotype , evolutionary biology , analysis of molecular variance , genetic variation , intergenic region , genetic structure , population genetics , genetics , population , chloroplast , gene , phylogenetics , allele , genome , demography , sociology
The genetic variation and structure of Sladenia celastrifolia Kurz, a species of conservation concern, were investigated. Analyses of two chloroplast DNA loci ( trnS ‐ trnG and atpB ‐ rbcL intergenic regions) were carried out for 24 populations of S. celastrifolia and five haplotypes were identified. High levels of genetic differentiation ( G ST = 1, F ST = 1) were detected, which may be a result of limited gene flow caused by geographic isolation. Analysis of molecular variance suggests that the existence of marked phylogeographical structure within the haplotype distribution is probably due to geographic barriers among populations. The haplotype network and mismatch distribution analyses did not detect any signals for recent population expansions in S. celastrifolia . Thus, it can be inferred that the species likely persisted in situ during climatic oscillations. Considering its genetic diversity and uniqueness, conservation strategies are further discussed for this species.