کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1354530 980744 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Population structure and genetic diversity of Stipa grandis P. Smirn, a dominant species in the typical steppe of northern China
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Population structure and genetic diversity of Stipa grandis P. Smirn, a dominant species in the typical steppe of northern China
چکیده انگلیسی

Random amplified polymorphic DNA (RAPD) markers were used to characterize genetic heterogeneity within and among five populations of Stipa grandis in the Xilingol Plateau. Estimates of the percentage of polymorphic bands, Shannon's diversity information index and Nei's gene diversity index were comparatively high in the five populations, and the Population GSM was found to have the highest genetic diversity among all populations. An analysis of molecular variance indicated that the majority of variation existed within populations (74.12%), and that there was significant differentiation among populations (ΦST = 25.88%, P < 0.001). Genetic distance (ΦST) ranged from 0.198 to 0.310 and the differentiation between pair-wise populations was significant when individual pairs of populations were compared. Based on the ΦST values, gene flow (Nm) was estimated and was found to vary from 0.556 to 1.013 between pair-wise populations and 0.7412 among populations. The results of UPGMA cluster analysis and nonmetric multi-dimensional scaling analysis indicated that most variation occurred within populations and that genetic differentiation had happened between populations. These findings are important for a better understanding of the adaptive strategy of S. grandis in northern China and will be useful for conservation managers to work out an effective strategy to protect this important species.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Systematics and Ecology - Volume 36, Issue 1, January 2008, Pages 1–10
نویسندگان
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