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首页> 外文期刊>The Korean Journal of Genetics >Characterization and Differentiation of Indian Sheep Using Microsatellite Marker Information
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Characterization and Differentiation of Indian Sheep Using Microsatellite Marker Information

机译：利用微卫星标记信息表征和鉴别印度绵羊

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摘要

In this study the prevailing status of the genetic variability within and between two important sheep breeds - Marwari and Sonadi from Northwestern arid and semi arid region of India - was assessed using 25 Food and Agriculture Organization-International Society for Animal Genetics (FAO-ISAG) recommended microsatellite markers for ovines. All the markers were polymorphic in both breeds. Considerable high level of genetic variation was elucidated in the investigated breeds by allele diversity (Marwari= 6.24, Sonadi = 5.88) and gene diversity (Marwari = 0.683, Sonadi = 0.677). Genetic bottleneck was not detected in either of these sheep breeds. Overall positive F_(IS) value (0.129) and F_(IT) (0.179) > F_(ST) (0.058) indicated inbreeding to be one ofthe main cause for high genetic homogeneity and lack of hetero-zygosity in both breeds. Negative value of relatedness reflected influx of new germplasm in the investigated breeds. Low estimates of multilocus FST, low genetic distance measures (Nei's unbiased = 0.189) and high gene flow (Nm = 4.1) values implied low level of genetic differentiation between Marwari and Sonadi breeds. A correct breed assignment was possible for only 81% of individuals. To combat high level of inbreeding and dilution in their genetic material, the present study suggested that concerted efforts are needed to generate awareness among farmers for the frequent exchange of rams between their flocks and maintenance of breed purity by use of selected rams of the specific breeds.The present information on diversity analysis can further be used to make assessment of genetic diversity and relationships between other indigenous sheep breeds - an important component of conserving genetic resources.
机译：在这项研究中，使用25粮食与农业组织-国际动物遗传学会（FAO-ISAG）评估了两个重要绵羊品种-印度西北干旱和半干旱地区的Marwari和Sonadi内和之间的遗传变异的普遍状况。推荐使用绵羊微卫星标记。在两个品种中所有标记都是多态的。通过等位基因多样性（Marwari = 6.24，Sonadi = 5.88）和基因多样性（Marwari = 0.683，Sonadi = 0.677），在研究的品种中阐明了相当高的遗传变异水平。在这两个绵羊品种中均未检测到遗传瓶颈。 F_（IS）（0.129）和F_（IT）（0.179）> F_（ST）（0.058）的总体阳性表明，近交是这两个品种遗传同源性高和缺乏杂合性的主要原因之一。相关性的负值反映了新种质在研究品种中的涌入。低估多位点FST，低遗传距离测量（Nei无偏= 0.189）和高基因流量（Nm = 4.1）值意味着Marwari和Sonadi品种之间的遗传分化水平较低。仅81％的个体可以进行正确的品种分配。为了对抗高水平的近亲繁殖和遗传材料稀释，本研究表明，需要采取共同的努力，以提高农民之间的认识，即他们使用特定品种的公羊来频繁地交换其羊群中的公羊并保持品种纯度。目前有关多样性分析的信息可进一步用于评估遗传多样性以及其他本地绵羊品种之间的关系，这是保护遗传资源的重要组成部分。

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