caa a22 4500 388059680 CHVBK 20180307125117.0 cr unu---uuuuu 161130e199806 xx s 000 0 eng 10.1017/S1357729800009152 doi S1357729800009152 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800009152 Estimation of genetic parameters using health, fertility and production data from a management recording system for dairy cattle [Elektronische Daten] The Dairy Information System (DAISY) was developed to record fertility and health information for use in research and to help farmers manage their farms. Data from 33 herds recording health and fertility over a 6-year period were used to study genetic relationships of several health, fertility and production traits. There were 10 569 records from 4642 cows of all parities. These were used to estimate genetic parameters for health: mastitis, lameness and somatic cell score (SCS), for fertility: calving interval, days to first service, conception to first service and for production: 305-day milk, butterfat and protein yields. Heritabilities for these traits were also estimated for the first three lactations. (Co)variances were estimated using linear, multitrait restricted maximum likelihood (REML) with an animal model. Mastitis and lameness were treated as all-or-none traits. The incidence of these diseases increased with lactation number, which may lead to variance component estimation problems, as the mean is linked to the variance in binomial distributions. Therefore, a method was used to fix the within-lactation variance to one in all lactations while maintaining the same mean. The heritability for SCS across lactations was 0·15. Heritabilities for other health and fertility traits were low and ranged between 0·013 and 0·047. All genetic correlations with the production traits were antagonistic implying that selection for yield may have led to a deterioration in health and fertility. The genetic correlation between SCS and mastitis was 0·65 indicating that indirect selection for improvements in mastitis may be achieved using somatic cell counts as a selection criterion. The potential use of linear type scores as predictors of the health traits was investigated by regressing health traits on sire predicted transmitting abilities for type. The results indicate that some type traits may be useful as future selection criteria. Copyright © British Society of Animal Science 1998 dairy cattle nationallicence fertility nationallicence genetic correlation nationallicence health nationallicence heritability nationallicence type traits nationallicence Pryce J. E. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG Esslemont R. J. Department of Agriculture, Earley Gate, University of Reading RG6 6AT Thompson R. Statistics Department, Institute of Arable Crops Research (IACR), Rothamsted, Harpenden AL5 2JQ Veerkamp R. F. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG Kossaibati M. A. Department of Agriculture, Earley Gate, University of Reading RG6 6AT Simm G. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG Animal Science Cambridge University Press 66/3(1998-06), 577-584 1357-7298 66:3<577 1998 66 ASC https://doi.org/10.1017/S1357729800009152 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800009152 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pryce J. E. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG NATIONALLICENCE 700 1- Esslemont R. J. Department of Agriculture, Earley Gate, University of Reading RG6 6AT NATIONALLICENCE 700 1- Thompson R. Statistics Department, Institute of Arable Crops Research (IACR), Rothamsted, Harpenden AL5 2JQ NATIONALLICENCE 700 1- Veerkamp R. F. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG NATIONALLICENCE 700 1- Kossaibati M. A. Department of Agriculture, Earley Gate, University of Reading RG6 6AT NATIONALLICENCE 700 1- Simm G. Genetics and Reproduction Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG NATIONALLICENCE 773 0- Animal Science Cambridge University Press 66/3(1998-06), 577-584 1357-7298 66:3<577 1998 66 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge