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

机译:中国主要荒漠树梭梭(Amaranthaceae)种群内和种群间的遗传变异

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摘要

• 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.
机译:•背景和目标中国是受荒漠化影响最严重的国家之一。 Haloxylon ammodendron(Amaranthaceae)是沙漠生态系统的重要生态组成部分,是用于恢复的主要树种之一,但我们对其遗传结构知之甚少。•方法从两个种群的九个种群中H. ammodendron的遗传变异关键结果本研究中使用了八种引物,扩增了219条可复制的条带,其中184条(84%)具有多态性。分子变异分析(AMOVA)显示,群体内遗传变异高(97·63%),区域间遗传变异低(0·62%),群体间遗传变异低(1·75%)。结论结论高水平的基因流动可能产生了这种结构。在这里观察到的种群之间的基因流动可能主要归因于花粉运动。遗传结构在生态恢复实践中也具有重要意义。

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