Analysis of milk characteristics in cows and their daughters
1999
Zwolinska-Bartczak, I. | Zuk, B. | Pawlina, E. (University of Agriculture, Wroclaw (Poland). Dept. of Genetics and Animal Breeding)
Milk yields of 43,419 Black-White and 20,995 Red-White cows and their daughters used in 1978-1993 in the South-West region of Poland were analysed. Breeding values of all animals were estimated by BLUP (Animal Model). The data was preadjusted for age and season of calving. Cows-dams were classified to a group of cows with high performance by two ways: 1. cows recorded in High Performance Register, 2. cows which exceeded an assumed production level. Breeding values of classified dams were higher than those of remaining dams. Similarly, daughters of these dams had higher breeding values than daughters of remaining dams. Greater differences were observed in Black-White breed. Generally, differences in breeding value in dam group were higher than in daughter group.
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