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A short note on DNA lactotypes in the Churra and Manchega sheep breeds
1Departamento de Producción Animal I, Facultad de Veterinaria, Universidad de León, 24071, León, Spain
Small Ruminant Research : the Journal of the International Goat Association
|June 26, 2001
Abstract:
The structure and genetic diversity of the Spanish dairy breeds, Churra and Manchega, is analyzed by means of DNA lactotypes observed in alpha(s1)-, alpha(s2)-, beta- and kappa-ovine caseins. The inter-racial distribution of the casein genotypes is also analyzed. The two breeds differ quantitatively as well as qualitatively in their lactotypes. The proportions of unique lactotypes in Churra and Manchega reveal a high degree of within breed diversity. Breed genetic diversity is greater in Manchega (1.28) than Churra (1.53). The probability combination test indicates the existence of significant inter-racial differences.