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AOBPreview originally published online on May 26, 2005
Annals of Botany 2005 96(2):245-252; doi:10.1093/aob/mci171
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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

Genetic Variation Within and Among Populations of a Dominant Desert Tree Haloxylon ammodendron (Amaranthaceae) in China

YAN SHENG1, WEIHONG ZHENG2, KEQUAN PEI1 and KEPING MA1,*

1 Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China and 2 College of Life Sciences and Technology, Qiqihaer University, Qiqihaer 161006, China

* For correspondence. E-mail makp{at}brim.ac.cn

Received: 11 November 2003    Returned for revision: 23 March 2004    Accepted: 14 April 2005    Published electronically: 26 May 2005

• Background and Aims China is one of the countries most severely affected by desertification. Haloxylon ammodendron (Amaranthaceae) is an ecologically important component of the desert ecosystem and is one of the main tree species used for restoration, yet we know little about its genetic structure.

• Methods Genetic variation within and between nine populations of H. ammodendron from two regions of China was investigated using ISSR (inter-simple sequence repeat) markers.

• Key Results Eight primers used in this study amplified 219 reproducible bands of which 184 (84 %) were polymorphic. Analysis of molecular variance (AMOVA) revealed high genetic variation within populations (97·63 %) and low genetic differentiation between regions (0·62 %) and among populations (1·75 %).

• Conclusions It is suggested that the present genetic structure could have arisen by high levels of gene flow. The gene flow among populations observed here is probably mainly attributable to pollen movement. The genetic structure also has important implications in ecological restoration practice.

Key words: Haloxylon ammodendron, ISSR, genetic structure, gene flow, ecological restoration


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