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Factors affecting calving date and its relationship with production traits of Hereford dams

Published online by Cambridge University Press:  25 May 2016

J. E. O. Rege  and
T. R. Famula
J. E. O. Rege
Affiliation:
Department of Animal Science, University of California, Davis, Davis CA 95616, USA
T. R. Famula
Affiliation:
Department of Animal Science, University of California, Davis, Davis CA 95616, USA
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Abstract

Calving date (CD) records of 68 896 polled Hereford dams of 120 682 calves were coded within herd-year-season with date 1 being the date the first calf was born. Factors affecting CD and its relationship with production traits were investigated. Early calving was found to be associated with high performance, conceivably because dams calving early were able to utilize the season-dependent range pastures to their advantage thus providing adequate milk supply to their calves. Weight and age of dam, weight of calf, initial CD, index of milk production potential, and previous CD were found to have significant influence on current CD. Extremely small cows at previous weaning had a tendency to calve late. Cows calving in the spring produced calves with higher overall weight per day of age than did cows calving in other seasons. Initial CD was found to affect CD in subsequent parities. Repeatability of CD was estimated at 0·23. Heritability was estimated at 0·16 (s.e. 0·05) and indicated that additive genetic variance constitutes a moderate proportion of the variation in CD. Genetic correlation of CD with birth weight (−0·30, s.e. 0·10), post-weaning rate of gain (·0·64, s.e. 0·19) and yearling weight (−0·60, s.e. 0·11) indicated that ‘plus’ additive genes for CD influenced these traits favourably. However, the corresponding correlations with pre-weaning rate of gain (−0·03, s.e. 0·08) and weaning weight (−0·05, s.e. 0·03) were not significant.

Keywords

beef cattlecalf growthcalving datereproductive efficiency
Type
Research Article
Information
Animal Production , Volume 57 , Issue 3 , December 1993 , pp. 385 - 395
Copyright
Copyright © British Society of Animal Science 1993

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References

Azzam, S. M. and Nielsen, M. K. 1987. Genetic parameters for gestation length, birth date and first breeding date in beef cattle, journal of Animal Science 64: 348–356.CrossRefGoogle Scholar
Baker, R. L., Carter, A. H., Cox, E. H. and Templer, H. A. 1974. Influence of birth date and dam's age on early growth in beef cattle. Proceedings of the New Zealand Society of Animal Production 34: 115–130.Google Scholar
Beef Improvement Federation. 1981. Guidelines for uniform beef improvement programmes. Beef Improvement Federation (BW) recommendations. USDA Extension Service, Programme Aid 1020.Google Scholar
Bourdon, R. M. and Brinks, J. S. 1982. Genetic, environmental and phenotypic relationships among gestation length, birth weight, growth traits, and age at first calving in beef cattle. Journal of Animal Science 55: 543–553.CrossRefGoogle ScholarPubMed
Bourdon, R. M. and Brinks, J. S. 1983. Calving date versus calving interval as a reproductive measure in beef cattle. journal of Animal Science 57: 1412–1417.CrossRefGoogle ScholarPubMed
Buddenberg, B. J., Brown, C. J. and Brown, A. H. 1990. Heritability estimates of calving date in Hereford cattle maintained on range under natural mating, journal of Animal Science 68: 70–74.CrossRefGoogle ScholarPubMed
Dickerson, G. E., Kunzi, N., Cundiff, L. V., Koch, R. M., Arthaud, V. H. and Gregory, K. E. 1974. Selection criteria for efficient beef production, journal of Animal Science 39: 659–673.CrossRefGoogle Scholar
Itulya, S. 1980. Most probable producing ability, fertility and related selection criteria for Hereford cows. Ph.D. Thesis, University of Arizona, Arizona, USA.Google Scholar
Lesmeister, J. L., Burfening, P. J. and Blackwell, R. L. 1973. Date of first calving in beef cows and subsequent calf production. Journal of Animal Science 36:1–6.CrossRefGoogle Scholar
Meacham, N. S. and Notter, D. R. 1987. Heritability estimates for calving date in Simmental cattle, journal of Animal Science 64: 701–705.CrossRefGoogle Scholar
Meyer, K. 1991. DFREML version 2.0. Programmes to estimate variance components by Restricted Maximum Likelihood using a derivative-free algorithm. User notes. Animal Genetics and Breeding Unit, University of New England, Armidale NSW, Australia. Mimeo.Google Scholar
Meyer, K., Hammond, K., Parnell, P. F., Mackinnon, M. J. and Sivarajasingam, S. 1990. Estimates of heritability and repeatability for reproductive traits in Australian beef cattle. Livestock Production Science 25:15–30.CrossRefGoogle Scholar
Meyer, K. and Hill, W. G. 1992. Approximation of sampling variances and confidence intervals for maximum likelihood estimates of variance components. Journal of Animal Breeding and Genetics 109: 264–280.CrossRefGoogle Scholar
Morris, C. A. 1990. Theoretical and realised responses to selection for reproductive rate. Proceedings of the fourth world congress on genetics applied to livestock production, Edinburgh, vol. 16, pp. 309–318.Google Scholar
Morris, C. A. and Cullen, N. G. 1988. Oestrous and reproductive performance of early- and late-calving beef cows. New Zealand Journal of Agricultural Research 31: 395–399.CrossRefGoogle Scholar
Notter, D. R. 1988. Evaluating and reporting reproductive traits. Proceedings of the Beef Improvement Federation research symposium and annual meeting, Alburquerque, New Mexico, pp. 21–42.Google Scholar
Ponzoni, R. W. 1992. Which trait for genetic improvement of beef cattle reproduction: calving rate or calving day? journal of Animal Breeding and Genetics 109: 119–128.CrossRefGoogle Scholar
Ponzoni, R. W. and Newman, S. 1989. Developing breeding objectives for Australian beef cattle production. Animal Production 49: 35–47.Google Scholar
Statistical Analysis Systems Institute. 1987. SAS/STAT guide for personal computers, version 6. SAS Institute Inc., Cary, NC.Google Scholar
Torre, L. G. de and Brinks, J. S. 1990. Some alternatives to calving date and interval as measures of fertility in beef cattle, journal Animal Science 68: 2650–2657.CrossRefGoogle Scholar
Warwick, E. J. and Legates, J. E. 1979. Breeding and improvement of farm animals. 7th ed. McGraw Hill, New York.Google Scholar