The breed structure was analysed by means of four generation pedigrees of calves registered in 1980 and 1990. The structure of the breed had a pyramidal shape for both 1980 and 1990. During 1980 there was a higher intesnity of gene flow from the top strata downwards than in 1990. No gene flow from the bottom to the top was found.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 254–257, 1994
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