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Analysis of Geographic and Pairwise Distances among Chinese Cashmere Goat Populations

机译:中国绒山羊种群之间的地理和成对距离分析

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摘要

This study investigated the geographic and pairwise distances of nine Chinese local Cashmere goat populations through the analysis of 20 microsatellite DNA markers. Fluorescence PCR was used to identify the markers, which were selected based on their significance as identified by the Food and Agriculture Organization of the United Nations (FAO) and the International Society for Animal Genetics (ISAG). In total, 206 alleles were detected; the average allele number was 10.30; the polymorphism information content of loci ranged from 0.5213 to 0.7582; the number of effective alleles ranged from 4.0484 to 4.6178; the observed heterozygosity was from 0.5023 to 0.5602 for the practical sample; the expected heterozygosity ranged from 0.5783 to 0.6464; and Allelic richness ranged from 4.7551 to 8.0693. These results indicated that Chinese Cashmere goat populations exhibited rich genetic diversity. Further, the Wright’s F-statistics of subpopulation within total (FST) was 0.1184; the genetic differentiation coefficient (GST) was 0.0940; and the average gene flow (Nm) was 2.0415. All pairwise FST values among the populations were highly significant (p<0.01 or p<0.001), suggesting that the populations studied should all be considered to be separate breeds. Finally, the clustering analysis divided the Chinese Cashmere goat populations into at least four clusters, with the Hexi and Yashan goat populations alone in one cluster. These results have provided useful, practical, and important information for the future of Chinese Cashmere goat breeding.
机译:这项研究通过分析20个微卫星DNA标记,调查了9个中国本地喀什米尔山羊种群的地理距离和成对距离。使用荧光PCR来鉴定标记,根据联合国粮食及农业组织(FAO)和国际动物遗传学会(ISAG)鉴定的标记来选择标记。总共检测到206个等位基因。平均等位基因数为10.30;位点的多态性信息含量范围为0.5213〜0.7582。有效等位基因的数量范围为4.0484至4.6178;对于实际样品,观察到的杂合度为0.5023至0.5602;预期杂合度为0.5783至0.6464;等位基因的丰富度范围为4.7551至8.0693。这些结果表明中国绒山羊种群具有丰富的遗传多样性。此外,Wright的合计内亚人群的F统计量(FST)为0.1184;遗传分化系数(GST)为0.0940;平均基因流量(Nm)为2.0415。种群之间所有成对的FST值都非常显着(p <0.01或p <0.001),这表明所研究的种群应全部视为单独​​的品种。最后,聚类分析将中国开士米山羊种群至少分为四类,仅河西和崖山山羊种群为一类。这些结果为中国羊绒山羊育种的未来提供了有用,实用和重要的信息。

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