Conservation genetics and geographic patterns of genetic variation of the vulnerable officinal herb Fritillaria walujewii (Liliaceae)
Zhihao Su A D , Borong Pan A , Stewart C. Sanderson B , Xiaojun Shi A and Xiaolong Jiang C
+ Author Affiliations
- Author Affiliations
A Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
B Shrub Sciences Laboratory, Intermountain Research Station, Forest Service, US Department of Agriculture, Utah 84601, USA.
C Shanghai Chenshan Plant Science Research Center, Shanghai Chenshan Botanical Garden, Chinese Academy of Sciences, Shanghai 201602, China.
D Corresponding author. Email: suzh@ms.xjb.ac.cn
Australian Journal of Botany 63(6) 467-476 https://doi.org/10.1071/BT14172
Submitted: 3 July 2014 Accepted: 19 April 2015 Published: 21 May 2015
Abstract
The Chinese herb Fritillaria walujewii Regel is an important officinal species that is vulnerable because of over-harvesting. Here, we examined the geographic pattern of genetic variation across the species entire range, to study its evolution process and give implication needed for the conservation. Nine haplotypes were detected on the basis of three chloroplast spacers. The most common haplotype was central in the haplotype network and was distributed widely from the Yili Valley to the eastern Tianshan Mountains. Genetic variation primarily occurred among populations and SAMOVA groups and the analysis of genetic structure showed a significant correlation between genetic and geographical distance. The fragmented distribution of F. walujewii in deep valleys may cause gene-flow barriers among distant populations and, along with genetic drift, has caused high genetic structure in the species. We identified Xinyuan County as the centre of diversification of F. walujewii, and speculated that populations in the eastern Tianshan Mountains were colonised from the Yili Valley. In relation to conservation management, we identified Xinyuan and Zhaosu County as having a high degree of genetic diversity and these should be the areas of the greatest focus for conservation.
Additional keywords: conservation implications, genetic diversity, genetic structure.
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