Genetic analysis of the Brown Swiss Cattle
1995
Kaygisiz, A. | Vanli, Y. (Kahramanmaras Sutcu Imam Univ., Kahramanmaras (Turkey))
The genetic parameters were determined for milk yield traits and genetic trend of 305-day milk yield of Brown Swiss cattle. Data were collected on the milk yield traits of Brown Swiss cattle raised at Regional Agricultural School in Van over a period of 22 years from 1968 to 1989. Genetic trens estimates were measured by taking genetic superiority and generation interval from 4 paths of parent of offspring. The genetic trend in milk yield of cows in the herds from 1969 to 89 was estimated as 15.51 kg/year. About 90.4% of this gain came from the selection of dams of bulls
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