| Relationships of calving ease with type traits. | |
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MedLine Citation:
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PMID: 2099378 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Type information collected by the Holstein Association of Canada was combined with calving ease data from the Quebec Dairy Herd Analysis Service. Type traits considered were overall score, general appearance, dairy character, capacity, rump, rump thurl width, rump pin setting, and set of rear legs. Calving ease was considered as a direct effect and as a maternal effect in both heifers and adult cows. After editing there were 24,618 type records, 47,023 direct effect calving ease records, and 37,068 maternal effect calving ease records from 107 sires in the analyses of heifer data. there were 26,996 type records, 16,4726 direct effect calvin ease records, and 45,261 maternal effect calving ease records in the analyses of calving involving adult cows. Multiple-trait REML was used to estimate genetic correlations between calving ease and type. The heritability of calving ease in heifers was approximately 4%, for both the direct and maternal effect, and in adult cows was approximately 1.5%. Heritability of the type traits ranged from 4 to 45%. There was a tendency for the genetic correlations between type and the direct effect of calving ease to be opposite in sign to the genetic correlations between type and the maternal effect of calving ease and for the absolute value of the correlations to be lower in adult cows than in heifers. |
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Authors:
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R I Cue; H G Monardes; J F Hayes |
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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 dairy science Volume: 73 ISSN: 0022-0302 ISO Abbreviation: J. Dairy Sci. Publication Date: 1990 Dec |
Date Detail:
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Created Date: 1991-08-05 Completed Date: 1991-08-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 3586-90 Citation Subset: IM |
Affiliation:
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Department of Animal Science, McGill University, Ste Anne de Bellevue, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Animals Breeding* Cattle / anatomy & histology, genetics*, physiology Female Labor, Obstetric / genetics*, physiology Pregnancy |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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