Abstract
Abstract. Data obtained from the evaluation of longevity in 118 646 dairy cows of the Slovak Simmental breed were analyzed. The average length of productive life reached 1 451 days (3.88 years). Based on the analysis of the length of productive life for the whole cattle population, we calculated the ratio of cows that reached more than 12, 24, 36, 48, 60, 72 and 84 months respectively. The most important effects were the sire (F=53.43, P<0.001) and the farm effect (F=26.32, P<0.001). The milk production at first lactation was an important factor, too. The effects of conformation traits on the length of productive life were analyzed in a group of 6 585 culled cows. From the main conformation traits the most important effects were recorded for body frame, udder, feet and legs. For a detailed evaluation, the level of the effects of a particular body conformation trait were tested. The most important effects were rump angle, croup height and body depth. The analysis of udder traits showed that the most important effects were udder depth, teats length, rear udder attachment and rear udder. From the feet and legs traits the most important effects were recorded for fetlock, foot and rear legs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
