Geographical partitioning of goat diversity in Europe and the Middle East
Geographical partitioning of goat diversity in Europe and the Middle East
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DOI：
10.1111/j.1365-2052.2006.01461.x
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发表时间：
2006-08-01
期刊：
影响因子：
2.4
通讯作者：
Dunner, S.
中科院分区：
文献类型：
--
作者：
Canon, J.;Garcia, D.;Dunner, S.
30微卫星标记分析了1426山羊从45个传统或稀有品种在15个欧洲和中东国家。在所有群体中，近交表明杂合性不足（平均F-IS = 0.10）。品种间的遗传分化是中等的，平均F-ST值为0.07，但大多数（c。北方和中欧的品种，个人可以分配到他们的品种，成功率超过80%。基于贝叶斯的等位基因频率聚类分析和多变量分析揭示了至少四个离散的聚类：地中海东部（中东），地中海中部，地中海西部和中欧/北方欧洲。约41%的品种之间的遗传变异可以解释其地理来源。从东南到西北的遗传多样性的减少是伴随着在品种水平上的分化水平的增加。这些观察结果支持了这一假设，即国内牲畜从中东迁移到西欧和北方欧洲，并表明品种形成更系统的中北部欧洲比中东。我们建议品种分化和分子多样性是保护的独立标准。
Thirty microsatellite markers were analysed in 1426 goats from 45 traditional or rare breeds in 15 European and Middle Eastern countries. In all populations inbreeding was indicated by heterozygosity deficiency (mean F-IS = 0.10). Genetic differentiation between breeds was moderate with a mean F-ST value of 0.07, but for most (c. 71%) northern and central European breeds, individuals could be assigned to their breeds with a success rate of more than 80%. Bayesian-based clustering analysis of allele frequencies and multivariate analysis revealed at least four discrete clusters: eastern Mediterranean (Middle East), central Mediterranean, western Mediterranean and central/northern Europe. About 41% of the genetic variability among the breeds could be explained by their geographical origin. A decrease in genetic diversity from the south-east to the north-west was accompanied by an increase in the level of differentiation at the breed level. These observations support the hypothesis that domestic livestock migrated from the Middle East towards western and northern Europe and indicate that breed formation was more systematic in north-central Europe than in the Middle East. We propose that breed differentiation and molecular diversity are independent criteria for conservation.