| Invited review: crossbreeding in dairy cattle: a Danish perspective. | |
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MedLine Citation:
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PMID: 18946115 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The value of crossbreeding in livestock species has been known for a long time; it has been used heavily within beef cattle, pig, and poultry production systems for several decades. This has not been the case for dairy production but lately there has been increased interest in crossbreeding dairy breeds. This review focuses on the practical and theoretical background of crossbreeding and describes the gain to be expected using systematic crossbreeding in dairy production. In Denmark, 24% of dairy farmers would consider starting crossbreeding programs within their herd. Evidence for the value of crossbreeding is documented with special emphasis on results from a Danish crossbreeding experiment. This experiment included 1,680 cows from 3 breeds and their crosses. In general, at least 10% heterosis can be expected for total merit, mainly due to increased longevity and improvement of functional traits. A minor part of heterosis for total merit is due to heterosis for production traits. For production, there is evidence of recombination loss using continued crossbreeding programs, which does not seem to be the case for longevity and total merit. However, recombination loss should be investigated more carefully as crossbreeding is becoming more popular. A prerequisite for crossbreeding to be beneficial on a long-term basis is that genetic gain within the parental breeds not be reduced. As long as the crossbred cow population constitutes less than 50% of the whole population, and young bulls can be tested through crossbred offspring, this prerequisite can be fulfilled. Crossbreeding can increase dairy income substantially, especially in management systems requiring a high level of functional traits. |
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Authors:
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M K Sørensen; E Norberg; J Pedersen; L G Christensen |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Journal of dairy science Volume: 91 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2008-10-23 Completed Date: 2009-01-07 Revised Date: - |
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: 4116-28 Citation Subset: IM |
Affiliation:
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Department of Genetics and Biotechnology, Faculty of Agricultural Sciences, Aarhus University, Research Centre Foulum, PO Box 50, DK-8830, Denmark. morten.kargo@agrsci.dk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Attitude Cattle / genetics* Dairying / economics, methods* Denmark Hybrid Vigor / genetics Hybridization, Genetic* / genetics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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