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Diversity analysis of sheep breeds from Southern peninsular and Eastern regions of India

机译：印度南部半岛和东部地区绵羊品种的多样性分析

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摘要

Information is presented on the genetic diversity and relationship among six Indian sheep breeds/populations belonging to the Southern peninsular and Eastern agroecological zones, based on microsatellite markers. Parameters of genetic variation, viz., allele diversity, observed heterozygosity, gene diversity and population inbreeding estimates, were calculated for the six breeds. The allele diversity ranged from 6.40 to 7.92, whereas the gene diversity varied from 0.617 to 0.727. The highest allele and gene diversity was observed for Nellore sheep, while the lowest was exhibited by Garole breed. Within population inbreeding estimate (F IS) revealed a significant deficit of heterozygotes in Deccani, Madgyal, Nellore and Garole, whereas Ganjam and Chhotanagpuri sheep showed an excess of heterozygotes. The contribution of each breed to the total diversity of the breeds was quantified by the Weitzman approach. The marginal loss of diversity incurred with removal of Nellore and Garole breeds was higher (>27%), whereas removal of Deccani breed resulted in lowest loss of diversity (3.84%) from the set. Estimation of the genetic differentiation (F ST) and genetic distance (D A) between the pairs of breeds revealed a close relationship between Deccani and Madgyal sheep (F ST = 0.017; D A = 0.080) and greatest demarcation between Madgyal and Garole breeds (F ST = 0.110; D A = 0.622). The information generated would help in shaping genetic management and conservation programs for the sheep breeds under consideration.
机译：根据微卫星标记，介绍了属于南部半岛和东部农业生态区的六个印度绵羊品种/种群之间的遗传多样性和关系的信息。计算了六个品种的遗传变异参数，即等位基因多样性，观察到的杂合性，基因多样性和种群近交估计。等位基因多样性在6.40至7.92之间，而基因多样性在0.617至0.727之间。 Nellore绵羊的等位基因和基因多样性最高，而Garole品种的最低。在种群的近交估计中（F IS ）显示Deccani，Madgyal，Nellore和Garole的杂合子明显不足，而Ganjam和Chhotanagpuri绵羊则显示出过多的杂合子。每个品种对品种总多样性的贡献通过韦茨曼方法进行定量。去除Nellore和Garole品种导致的多样性的边际损失较高（> 27％），而去除Deccani品种导致的多样性损失最低（3.84％）。对这两个品种之间的遗传分化（F ST ）和遗传距离（D A ）的估算揭示了德卡尼羊与马达格绵羊（F ST = 0.017； D A = 0.080）和Madgyal和Garole品种之间的最大分界（F ST = 0.110； D A = 0.622）。所产生的信息将有助于为正在考虑的绵羊品种制定遗传管理和保护计划。

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