Evidence for a geographical cline of casein haplotypes in Portuguese cattle breeds

• Type: Article in International Scientific Journal
• Date: 2002

Authors

beja-pereira, a (Author) FCUP; erhardt, g (Author) Other; matos, c (Author) Other; gama, l (Author) Other; ferrand, n (Author) FCUP

Journal

Title: Animal Genetics

Vol. 33

Pages: 295-300

ISSN: 0268-9146

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 22 Citations

Scopus - 26 Citations

Scientific classification

FOS: Agrarian Sciences > Animal and Dairy science

Other information

Authenticus ID: P-000-NCV

DOI: 10.1046/j.1365-2052.2002.00871.x

Abstract (EN): Genetic variants of bovine milk proteins have been intensively used to characterize breeds and as markers for population/QTL studies throughout the world. However, a large number of cattle breeds including those found in Portugal, remain unstudied. In this work, we have analysed the genetic variation of six milk protein loci in 10 Portuguese cattle breeds by isoelectric focusing. High genetic diversities were generally found across breeds, with the exception of Mirandesa that showed a trend to fixation of the most common alleles in five loci, as well as of the rarer CSN3(B) allele. The casein haplotype BA2A was often the most frequent, followed by haplotypes BA2B and BA1A. Remarkably, CA2A was found to be the second most frequent haplotype in Southern breeds, supporting a geographical cline between Central-Northern European breeds and Bos indicus populations. Our data suggest that high genetic similarity among neighbouring Portuguese breeds is mainly caused by gene flow, and that the geographical distribution of particular casein haplotypes may indicate an influence of African cattle.

Language: English

Type (Professor's evaluation): Scientific