中国6个双峰驼群体微卫星遗传多样性分析

doi:10.16431/j.cnki.1671-7236.2017.06.023

Abstract

Abstract:

In order to understand the genetic diversity of Bactrian camel and the genetic evolutionary relationships between different populations,the genetic diversity of Alashan camel, Qinghai camel, Nanjiang camel, Beijiang camel, Subei camel and Sunite camel populations in China were analyzed using 10 microsatellite markers. By calculating heterozygosity (H), polymorphism information content (PIC), effective allele (Ne), Shannon information index, the genetic variation within populations were analyzed. By calculating the F-statistics, gene flow, genetic differentiation coefficient and genetic distance to analyze the genetic relationship between populations. The results showed that 89 alleles were tested at the 10 microsatellite loci,8.9 alleles were tested at every locus in average. All loci were medium-highly polymorphic loci (except YWLL08),the average PIC of the Bactrian camel population was between 0.488 to 0.752. The observed heterozygosity (0.355 to 0.448) of 6 Bactrian camel populations was lower than the expected heterozygosity (0.643 to 0.703). Almost all loci Shannon index was greater than 1,and most of loci were in Hardy-Weinberg disequilibrium. The genetic differentiation coefficient between groups (Fst) value was 0.059 and in the low degree of moderately differentiated state. The average Fis values of 6 Bactrian camel populations were positive which suggested 6 Bactrian camel populations had different levels of inbreeding. The standard genetic distance (D_S) and genetic distance T (D_A) clustering analysis showed that the Nanjiang camel and Beijiang camel jointed as one group, the Alxa camel, Qinghai camel, Subei camel, Sunite camel jointed as the other group. Research showed that Chinese Bactrian camel was abundant in genetic diversity, genetic variation within population was larger, and there was a phenomenon of inbreeding. There was a certain gene flow between populations, the differentiation of populations were mainly caused by genetic variation within population. 6 Chinese Bactrian camel populations were divided into two groups.

Key words: microsatellite; genetic diversity; Bactrian camel

CLC Number:

S823.9⁺1

BAI Li, ZHOU Jun-wen, LI Xin-hai, FENG Deng-zhen. Analysis on the Genetic Diversity of Six Bactrian Camel Populations in China Using Microsatellite Marker[J]. , 2017, 44(6): 1734-1745.

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Analysis on the Genetic Diversity of Six Bactrian Camel Populations in China Using Microsatellite Marker

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