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AOBPreview published online on February 14, 2005
Annals of Botany, doi:10.1093/aob/mci087
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© The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
Received June 10, 2004
Revised July 12, 2004
Accepted December 22, 2004

Article

Population Genetic Structure of Monimopetalum chinense (Celastraceae), an Endangered Endemic Species of Eastern China

GUO-WEN XIE 1, DE-LIAN WANG 2, YONG-MING YUAN 3, and XUE-JUN GE 2*

1 School of Biology and Chemistry Engineering, Guangzhou University, Guangzhou 510405, P. R. China
2 South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China
3 Institut de Botanique, Université de Neuchâtel, Neuchâtel, CH-2007, Switzerland

* To whom correspondence should be addressed.
XUE-JUN GE, E-mail: xjge{at}scbg.ac.cn


  Abstract

• Background and Aims Monimopetalum chinense (Celastraceae) standing for the monotypic genus is endemic to eastern China. Its conservation status is vulnerable as most populations are small and isolated. Monimopetalum chinense is capable of reproducing both sexually and asexually. The aim of this study was to understand the genetic structure of M. chinense and to suggest conservation strategies.

• Methods One hundred and ninety individuals from ten populations sampled from the entire distribution area of M. chinense were investigated by using inter-simple sequence repeats (ISSR).

• Key Results A total of 110 different ISSR bands were generated using ten primers. Low levels of genetic variation were revealed both at the species level (Isp = 0·183) and at the population level (Ipop = 0·083). High clonal diversity (D = 0·997) was found, and strong genetic differentiation among populations was detected (49·06 %).

• Conclusions Small population size, possible inbreeding, limited gene flow due to short distances of seed dispersal, fragmentation of the once continuous range and subsequent genetic drift, may have contributed to shaping the population genetic structure of the species.

Keywords: Celastraceae, endangered species, genetic variation, ISSR, Monimopetalum chinense, vegetative reproduction.
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