In recent years, the advent of DNA molecular technologies, specifically PCR, and the appearance of microsatellites as an abundant source of highly polymorphic markers has boosted the generation of linkage maps in sheep and other livestock species (Beattie, 1994 ; Crawford et al., 1995 ; de Gortari et al., 1998 ; Maddox et al., 2001). The availability of these genetic maps jointly with other genomic resources (segregating populations, large insert libraries, radiation hybrid maps, comparative maps, preliminary transcript maps, etc.) has opened the possibility to map by linkage analysis and identify by positional cloning economic trait loci in livestock (Andersson, 2001).  

M. F El-Zarei, Juan Jose Arranz, B. Gutierrez-Gil, L. FBayon de la Fuente, F. San Primitivo

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.81, 2002
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