Abstract
The conservation of genetic variability is one of the main objectives in the field of genetics applied to domestic livestock. Among molecular markers, microsatellites are particularly appreciated and widely utilized for the study of animal genome. In this study a genetic characterization of three Italian Merino derived sheep breeds was carried out by 30 microsatellites markers; the genetic relationships between these breeds and the Spanish ancestors were also investigated. All the microsatellites examined resulted polymorphic and a total of 375 alleles were detected. Fis values of the three Italian Merinos demonstrate a low level of inbreeding. The results show a good genetic variability of all the studied breeds; at the same time, the genetic identity of each breed is confirmed. These molecular data can be utilized to improve the present selection schemes and the plans to preserve genetic diversity.
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