| Genetic analysis for mastitis resistance and milk somatic cell score in French Lacaune dairy sheep. | |
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MedLine Citation:
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PMID: 11559483 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Genetic analysis for mastitis resistance was studied from two data sets. Firstly, risk factors for different mastitis traits, i.e. culling due to clinical or chronic mastitis and subclinical mastitis predicted from somatic cell count (SCC), were explored using data from 957 first lactation Lacaune ewes of an experimental INRA flock composed of two divergent lines for milk yield. Secondly, genetic parameters for SCC were estimated from 5 272 first lactation Lacaune ewes recorded among 38 flocks, using an animal model. In the experimental flock, the frequency of culling due to clinical mastitis (5% ) was lower than that of subclinical mastitis (10% ) predicted from SCC. Predicted subclinical mastitis was unfavourably associated with the milk yield level. Such an antagonism was not detected for clinical mastitis, which could result, to some extent, from its low frequency or from the limited amount of data. In practice, however, selection for mastitis resistance could be limited in a first approach to selection against subclinical mastitis using SCC. The heritability estimate of SCC was 0.15 for the lactation mean trait and varied from 0.04 to 0.12 from the first to the fifth test-day. The genetic correlation between lactation SCC and milk yield was slightly positive (0.15) but showed a strong evolution during lactation, i.e. from favourable (-0.48) to antagonistic (0.27). On a lactation basis, our results suggest that selection for mastitis resistance based on SCC is feasible. Patterns for genetic parameters within first lactation, however, require further confirmation and investigation. |
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Authors:
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F Barillet; R Rupp; S Mignon-Grasteau; J M Astruc; M Jacquin |
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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: Genetics, selection, evolution : GSE Volume: 33 ISSN: 0999-193X ISO Abbreviation: Genet. Sel. Evol. Publication Date: 2001 Jul-Aug |
Date Detail:
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Created Date: 2001-09-17 Completed Date: 2001-10-18 Revised Date: 2009-07-06 |
Medline Journal Info:
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Nlm Unique ID: 9114088 Medline TA: Genet Sel Evol Country: France |
Other Details:
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Languages: eng Pagination: 397-415 Citation Subset: IM |
Affiliation:
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Station d'amélioration des animaux, Institut national de la recherche agronomique, BP 27, 31326 Castanet-Tolosan Cedex, France. Barillet@toulouse.inra.fr |
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Breeding Dairying Female France Genetic Variation Lactation / genetics*, physiology Mammary Glands, Animal / physiology Mastitis / genetics*, microbiology, prevention & control Mathematics Milk / cytology Risk Factors Sheep / genetics* Staphylococcus / pathogenicity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
| Full Text | |
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Journal Information Journal ID (nlm-ta): Genet Sel Evol ISSN: 0999-193X ISSN: 1297-9686 Publisher: BioMed Central |
Article Information Download PDF  Copyright © 2001 INRA, EDP Sciences Received Day: 14 Month: 9 Year: 2000 Accepted Day: 13 Month: 2 Year: 2001 collection publication date: Year: 2001 Electronic publication date: Day: 15 Month: 7 Year: 2001 Volume: 33 Issue: 4 First Page: 397 Last Page: 415 ID: 2705413 Publisher Id: 1297-9686-33-4-397 PubMed Id: 11559483 DOI: 10.1186/1297-9686-33-4-397 |
| Genetic analysis for mastitis resistance and milk somatic cell score in French Lacaune dairy sheep | |
| Francis Barillet1 | Email: Barillet@toulouse.inra.fr |
| Rachel Rupp2 | |
| Sandrine Mignon-Grasteau13 | |
| Jean-Michel Astruc4 | |
| Michèle Jacquin1 | |
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1Station d'amélioration des animaux, Institut national de la recherche agronomique, BP 27, 31326 Castanet-Tolosan Cedex, France |
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2Station de génétique quantitative et appliquée, Institut national de la recherche agronomique, 78352 Jouy-en-Josas Cedex, France |
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3Station de recherches avicoles, Institut national de la recherche agronomique, 37380 Nouzilly, France |
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4Institut de l'élevage, BP 18, 31321 Castanet-Tolosan Cedex, France |
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(To access the full article, please see PDF)
Article Categories:
Keywords: dairy sheep, somatic cell count, mastitis, genetic parameters, risk factors. |
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