African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Full Length Research Paper

Population genetic structure and gene flow of Forsythia suspensa (Oleaceae) in Henan revealed by nuclear and chloroplast DNA

Yong Li, Yonghua Li, Pan Yang and Songlin He1*
College of Forestry, Henan Agricultural University, Zhengzhou 450002, China.  
Email: [email protected]

  •  Accepted: 04 May 2011
  •  Published: 13 June 2011

Abstract

Forsythia suspensa (Thunb.) Vahl, is a climbing plant belonging to Oleaceae, which is widely distributed in China, North and South Korea and Japan. In this study, the genetic diversity of F. suspensa was analyzed using two noncoding chloroplast DNA regions (trnL-F and psbA-trnH) and nuclear ribosomal internal transcribed spacer (nrITS) with 60 individuals of Henan Province. A survey of nrDNA and cpDNA variation detected remarkably high levels of genetic diversity (nrDNA: h= 0.478; cpDNA: h= 0.806). As revealed by the results of AMOVA analysis, genetic differentiation for nrDNA (ФST = 0.110) was obviously lower than for cpDNA data (ФST = 0.937) in F. suspensa, gene flow among populations based on nrDNA (Nm= 2.02) was significantly higher than that based on cpDNA data (Nm = 0.02). Significant isolation-by-distance (IBD) for cpDNA was detected at the species-wide range (r = 0.548, P < 0.05), however, non-significant IBD for nrDNA was detected (r= 0.362, P > 0.05). On the basis of the genetic information, we propose LY and LJ populations should be conserved ex situ; however, JG and SS populations should be conserved in situ.

 

Key words: Forsythia suspensa, genetic diversity, gene flow.

Abbreviation

Abbreviations: ITS, Internal transcribed spacer; hTtotal genetic diversity; Ð¤ST,genetic differentiation among populations; Nm, gene flow among populations; IBD,isolation by distance; cpDNA, chloroplast DNA; nrDNA, nuclear DNA; AMOVA,analyses of molecular variance; MP, maximum parsimony; π, nucleotide diversity;h, haplotype diversity; JG, Jigong Mountain; TB, Tongbai Mountain; LY, longyuwan;LJ , Laojieling; SS, Songshan; JL, Jiulian Mountain.