JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 75 No. 4 1097-1104
© 1992 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cowan, C. M.
Right arrow Articles by Coyle, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cowan, C. M.
Right arrow Articles by Coyle, T.

Chromosome Substitution Effects Associated with kappa-Casein and ß-Lactoglobulin in Holstein Cattle

C. M. Cowan 1, M. R. Dentine 2, and T. Coyle 3

1 Genetic Visions, Inc. Madison, WI 53711 and Department of Dairy Science, University of Wisconsin Madison 53706
2 Department of Dairy Science, University of Wisconsin Madison 53706
3 Genetic Visions, Inc. Madison. WI 53711

Allelic variants of kappa-casein and ß-lactoglobulin were used to estimate chromosome substitution effects on transmitting abilities for yield traits among sons of two Holstein sues. Sire 1 was a heterozygote for both loci, whereas sire 2 was a heterozygote for ß-lactoglobulin only. Transmitting abilities for fat percentage and the exchange of protein and fat (protein yield minus fat yield) were influenced by kappa-casein genotype among offspring sire 1. The B allele of kappa-casein was associated with a decrease in fat percentage, whereas fat yield was not affected; the result was 4.5 kg more transmitting ability for protein than for fat. Favorable chromosome substitution effects on transmitting abilities for fat percentage, protein yield, and the exchange of protein and fat were also observed for the A allele of ß-lactoglobulin among offspring of sire 1; there were consistent but not significant estimates for sire 2.

These results suggest that different estimates could be obtained from offspring of different parents, perhaps from linkage disequilibrium between families. The chromosome substitution effects appeared to be in the direction opposite to the average correlation of milk fat and protein content; marker-assisted selection for increased yield of protein would result in decreased fat yield.

Key Words: genetic marker • linkage disequilibrium • family segregation • milk protein

Submitted on June 10, 1991
Accepted on November 12, 1991




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
P. J. Boettcher, A. Caroli, A. Stella, S. Chessa, E. Budelli, F. Canavesi, S. Ghiroldi, and G. Pagnacco
Effects of Casein Haplotypes on Milk Production Traits in Italian Holstein and Brown Swiss Cattle
J Dairy Sci, December 1, 2004; 87(12): 4311 - 4317.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1992 by the American Dairy Science Association ®.