Length of productive life and lifetime production of cows-daughters of high yielding dams in Poland

• Published in: Czech Journal of Animal Science Vol. 46; no. 3
• Main Authors: Zwolinska-Bartczak, I, Pawlina, E, Zuk, B, Kruszynski, W. (University of Agriculture, Wroclaw (Poland). Dept. of Genetics and Animal Breeding)
• Format: Journal Article
• Language: English
• Published: 01.03.2001
• Subjects: BREEDS (ANIMALS); CALVES; COW MILK; COWS; DAUGHTERS; FILLE; GRASA DE LA LECHE; HIJAS; LACTACION; LACTATION; LAIT DE VACHE; LECHE DE VACA; LONGEVIDAD; LONGEVITE; LONGEVITY; MATIERE GRASSE DU LAIT; MILK FAT; MILK YIELD; POLAND; POLOGNE; POLONIA; RACE (ANIMAL); RAZAS (ANIMALES); RENDEMENT LAITIER; RENDIMIENTO LECHERO; TERNERO; VACA; VACHE; VEAU
• ISSN: 1212-1819

Records of 19,017 Black-and-White and 10,135 Red-and-White cows and their daughters used in 1978-1993 in the South-West region of Poland were analyzed. Cows-dams were classified to a group of cows with high performance if they exceeded the assumed production level (x+1.96s or 1.28s, respectively). The following traits of cows-daughters were examined: number of lactations, number of calves, lifetime production of milk and fat, lifetime, length of productive life and milk and fat yield per life day and per production day. Daughters of cows with high performance produced higher milk and fat yields per production day than daughters of other dams. Lifetime and length of productive life of those cows were shorter.