| Genetic parameters for calving ease and survival at birth in Angus field data. | |
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MedLine Citation:
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PMID: 1778807 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Calving performance records from the American Angus Herd Improvement Registry files were used to estimate variance components for calving ease and survival to 24 h. Genetic parameters for direct and maternal effects were estimated by using a sire-maternal grandsire model. Data included two independent samples of 19 and 34 herds with complete calving information. Maternal variance for calving ease was much larger than the variance for the direct effect of the sire. Maternal heritability for calving ease was .27 and .20 in the two samples of herds, respectively. Heritabilities for direct effects were .21 and .07. The genetic correlations between direct and maternal effects were -.93 and -.80. There was little genetic variation in survival at birth. Parameter estimates were within the allowable parameter space in the sample of 19 herds. Heritability for the direct effect of the sire on survival was .04. Maternal heritability was .09, and the direct-maternal correlation was -.85. |
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Authors:
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A C Cubas; P J Berger; M H Healey |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of animal science Volume: 69 ISSN: 0021-8812 ISO Abbreviation: J. Anim. Sci. Publication Date: 1991 Oct |
Date Detail:
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Created Date: 1992-03-12 Completed Date: 1992-03-12 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 3952-8 Citation Subset: IM |
Affiliation:
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Iowa State University, Ames 50011. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Animals Animals, Newborn / growth & development* Breeding* Cattle / genetics*, growth & development, physiology Female Genetic Variation* Labor, Obstetric / genetics* Male Pregnancy |
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