HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Boichard, D. Articles by Barbat, A. Search for Related Content PubMed Articles by Boichard, D. Articles by Barbat, A.

Effect of Holstein Crossbreeding in the French Black and White Cattle Population

Institut National de la Recherche Agronomique, Station de Génétique Quantitative et Appliquée, 78352 Jouy-en-Josas Cedex, France

Heterosis and recombination losses of Holstein x European Black and White cattle were estimated for milk, fat, and protein yields and for fat and protein contents from about 12.4 million records collected in France on about 5.6 million cows between 1975 and 1992. The Holstein percentage reached almost 100% by 1980 for AI bulls and increased from 5% in 1970 to 83% in 1990 for cows. Crossbreeding parameters, including a nonadditive effect that was due to the breed composition, were estimated with an animal model. Heterosis reached 2 to 2.5% for yield traits and was very low for fat and protein contents. For yields, estimates of recombination losses were negative and reached 40 to 86% of heterosis. Recombination losses seemed to be slightly positive for contents. For yield traits, omission of these crossbreeding parameters (as is generally the case) for genetic evaluation led to an overestimation of the genetic difference between strains by 10% and to a downward bias of the within-strain genetic trend by 10 to 20%.

This article has been cited by other articles:

				C. D. Dechow, G. W. Rogers, J. B. Cooper, M. I. Phelps, and A. L. Mosholder Milk, Fat, Protein, Somatic Cell Score, and Days Open Among Holstein, Brown Swiss, and Their Crosses J Dairy Sci, July 1, 2007; 90(7): 3542 - 3549. [Abstract] [Full Text] [PDF]

				J. R. Bryant, N. Lopez-Villalobos, J. E. Pryce, C. W. Holmes, D. L. Johnson, and D. J. Garrick Short Communication: Effect of Environment on the Expression of Breed and Heterosis Effects for Production Traits J Dairy Sci, March 1, 2007; 90(3): 1548 - 1553. [Abstract] [Full Text] [PDF]

				P. M. VanRaden and A. H. Sanders Economic Merit of Crossbred and Purebred US Dairy Cattle J Dairy Sci, March 1, 2003; 86(3): 1036 - 1044. [Abstract] [Full Text] [PDF]