Phenotypic and genetic correlations of milk and type traits of Holstein-Friesian bull dams
2012
Pantelić, V., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Nikšić, D., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Ostojić-Andrić, D., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Novaković, Ž., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Ružić- Muslić, D., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Maksimović, N., Institute for Animal Husbandry, Belgrade - Zemun (Serbia) | Lazarević, M., Institute for Animal Husbandry, Belgrade - Zemun (Serbia)
The study of the production capacities of cattle aimed at increase of the capacity of cattle to produce milk, milk fat and calves, greatly depends on phenotypic and genetic variability, heritability and correlation between preferable traits, as well as level of production in the population. Objective of the study was to calculate the variability, phenotypic and genetic correlation of milk and type traits by applying the method of linear scoring of cows in the nucleus herd of Holstein-Friesian bull dams and also to determine their significance in cattle selection. For all studied traits, main variation-statistical parameters were calculated by applying method of least squares: arithmetic mean, standard deviation, variation coefficient, standard error and variation interval. Negative phenotypic correlations between production of milk and type traits ranged from -0.12 (rear leg set, side view) to -0.01 (rump height and body depth) and positive from 0.03 (rear teat placement) to 0.23 (suspensory ligament). Phenotypic correlations between milk fat percentage and type traits varied in the range from -0.08 (fore teat placement) to 0.14 (rump height). Negative genetic correlations between milk production and type traits ranged from -0.11 (rear udder height) to -0.01 (rump width and dairy form), and positive from 0.03 (rear legs set, rear view) to 0.23 (suspensory ligament). Genetic correlations between the percentage of milk fat and type traits ranged from -0.15 (pelvic position) to 0.18 (rump height). Information about phenotypic and genetic correlations between milk and type traits can be of multiple significance in cow selection since it offers possibility to select heads of cattle for multiple traits at the same time.
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