The effect of milk performance of dairy cows on the growth, early maturity and milk yield of their daughters

• Published in: Zivocisna Vyroba - UVTIZ (CSFR) Vol. 36; no. 2
• Main Authors: Pytloun, J, Motycka, J, Hrabetova, I, Kaderavek, J. (Vysoka Skola Zemedelska, Prague-Suchdol (CSFR)), Bouska, J, Vetyska, J
• Format: Journal Article
• Language: Czech
• Published: 01.02.1991
• Subjects: AGE; APTITUD LECHERA; APTITUDE LAITIERE; EDAD; EPREUVE SUR LA DESCENDANCE; GRASA DE LA LECHE; MATIERE GRASSE DU LAIT; PESO; POIDS; PRUEBAS DE DESCENDENCIA; RENDEMENT LAITIER; RENDIMIENTO LECHERO; TERNERO; VACAS LECHERAS; VACHE LAITIERE; VEAU
• ISSN: 0044-4847

An analysis of the effect of dam's maximum lactation and dam's lactation before the birth, or lactation after the birth of her daughter, revealed that in none of the cases were the statistically significant differences found out in the growth rate and early maturity of breeding cows of the Improved Bohemian Pied breed. As to milk performance, a positive trend was observed in all three evaluated lactations although there were statistically significant differences in milk yield (11.9 per cent) and in milk fat content (11.42 per cent); they were revealed by an evaluation of lactation after parturition. The data were collected at the milk yield of daughters-first-calvers reaching 4200 kg. Ensuing from the overall evaluation, lactation after parturition seems to be the most suitable characteristics for the estimation of the mother-daughter relationship; but there is one disadvantage because this value is not known sooner than at the daughter's age of about one year.