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Genetic diversity and its conservation implications of Vitex rotundifolia (Lamiaceae) populations in East Asia.

Sun, Y, Yang, H, Zhang, Q, Qin, L, Li, P, Lee, J, Chen, S, Rahman, K, Kang, T and Jia, M (2019) Genetic diversity and its conservation implications of Vitex rotundifolia (Lamiaceae) populations in East Asia. PeerJ, 7. ISSN 2167-8359

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Abstract

Vitex rotundifolia is an important coastal and medicinal plant, and is recorded in the List of the Important Wild Plants for Conservation in China and Japan. However, an effective conservation strategy is lacking. In the present study, the genetic diversity and population structure were analyzed using phylogeographical methods based on the trnH-psbA and trnG-trnS intergenic spacers of the chloroplast DNA (cpDNA) sequences from 157 individuals from 25 sampling sites for V. rotundifolia and V. trifolia plus the internal transcribed spacer (ITS) of the nuclear ribosomal DNA (nrDNA) sequences of 177 individuals from 27 sampling sites. The results showed that V. rotundifolia and V. trifolia had eight cpDNA and two nrDNA haplotypes, respectively, and the V. rotundifolia has a low level of genetic diversity (haplotype diversity hd,cp = 0.360, hd,nr = 0.440), a more pronounced genetic differentiation among populations (population differentiation at the species level (GST) = 0.201, population differentiation at the allele level (NST) = 0.462), and an insignificantly different phylogeographical structure (NST > GST, P > 0.05). In addition, haplotype network analyses indicated that V. rotundifolia and V. trifolia have distinct haplotypes. Divergence dating based on BEAST software analyses showed that most cpDNA clades diverged in the late Pleistocene era. Demographic analysis indicated that V. rotundifolia underwent a rapid demographic expansion. Some scientific strategies are suggested for resource conservation of V. rotundifolia based on its genetic diversity and population structure.

Item Type: Article
Uncontrolled Keywords: Phylogeography; Vitex rotundifolia; Vitex trifolia; cpDNA; nrDNA
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QK Botany
Divisions: Pharmacy & Biomolecular Sciences
Publisher: PeerJ
Related URLs:
Date Deposited: 24 Jan 2019 09:41
Last Modified: 24 Jan 2019 09:45
DOI or Identification number: 10.7717/peerj.6194
URI: http://researchonline.ljmu.ac.uk/id/eprint/9999

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