Fine-scale genetic structure of Eremosparton songoricum and implication for conservation

作     者：Liu, Yan Zhang, DaoYuan Yang, HongLan Liu, MeiYing Shi, Xiang 

作者机构：Chinese Acad Sci Key Lab Biogeog & Bioresources Arid Land Xinjiang Inst Ecol & Geog Urumqi 830011 Peoples R China Chinese Acad Sci Turpan Eremophytes Bot Garden Turpan 838008 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2010年第2卷第1期

页      面：26-32页

核心收录：

学科分类：07[理学] 

基　　金：supported by National Science Foundation program (30970547) Grant Project of Xinjiang Committee of Science and Technology (No.200933122) 

主　　题：Eremosparton songoricum genetic diversity clonal structure spatial distribution patterns conservation 

摘      要：Eremosparton songoricum (Litv.) Vass. is a clonal shrub that reproduces both asexually by under-ground rhizomes and sexually by seeds. It is now a rare species with a narrow distribution in fragmented habitat patches in the Gurbantunggut Desert of Xinjiang, China. The objective of this study was to determine the spatial pattern or structure of genetic variation within population. The within-populations genetic structure of E. songoricum in a plot (10 m×10 m) was analyzed using inter simple sequence repeats (ISSR) markers. Correlograms of Moran’s I showed significant positive value was about 7 m, but changed into a negative correlation with the increase of distance, indicating strong genetic structure. The natural character of clonal reproduction, restricted seed and pollen dispersal were the main factors of influencing the spatial pattern. The knowledge of clonal structures within populations was crucial for understanding evolutionary processes and ecological adaptation. This study provided basic data for the conservation and management of E. songoricum, especially for sampling strategies for ex situ conservation.