| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Laboratory of Dairy Sciences, Swiss Federal Institute of Technology (ETH), CH-8092 Zurich, Switzerland
2 Department of Animal Science, Swiss Federal Institute of Technology (ETH), CH-8092 Zurich, Switzerland
Effects of casein haplotypes and ß-lactoglobulin (LG) genotypes on milk protein fractions and on daughter yield deviations for milk performance traits were estimated from a daughter design. Offspring of seven Swiss Brown sires with the haplotypes B-A-B-A and B-A-B-B for 
s1-, s2-, ß-, and 
-caseins were selected. The milk of daughter groups with paternal haplotype B-A-B-A was associated with lower casein content and higher whey protein content compared with B-A-B-B. Because of these contrary effects, the true protein content was not affected by the paternal haplotypes. The effects of maternal haplotypes were significant on true protein and casein content but not on whey protein content. The ß-LG genotypes had highly significant effects on casein and whey protein content. The effect of ß-LG BB was positive on casein and negative on whey protein content compared with ß-LG AA; the effect of ß-LG AB was intermediate. No significant effects of paternal haplotypes were found for daughter yield deviation on kilograms of milk, fat, and protein or percentages of fat and protein. The effects of the ß-LG genotypes were, independent of the parental haplotypes, close to significant on daughter yield deviation for percentage of protein. The ß-LG BB tended to be associated with a higher protein content compared with ß-LG AA. The effects for ß-LG genotypes showed additive gene effects. The analysis of paternal haplotypes within sires revealed a contrary effect of haplotypes for two of the seven sires for casein content. The paternal haplotypes within sire showed, although not significant, that haplotypes of the two sires had a contrary effect on daughter yield deviation for percentage of protein as well.
Key Words: casein haplotypes • milk proteins • genetic variants • milk production traits
Submitted on November 16, 1999
Accepted on January 12, 2000
This article has been cited by other articles:
|
|
 |
|
  A. M. Caroli, S. Chessa, and G. J. Erhardt Invited review: Milk protein polymorphisms in cattle: Effect on animal breeding and human nutrition J Dairy Sci, November 1, 2009; 92(11): 5335 - 5352. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Chessa, F. Chiatti, G. Ceriotti, A. Caroli, C. Consolandi, G. Pagnacco, and B. Castiglioni Development of a Single Nucleotide Polymorphism Genotyping Microarray Platform for the Identification of Bovine Milk Protein Genetic Polymorphisms J Dairy Sci, January 1, 2007; 90(1): 451 - 464. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. H. Braunschweig and T. Leeb Aberrant low expression level of bovine beta-lactoglobulin is associated with a C to A transversion in the BLG promoter region. J Dairy Sci, November 1, 2006; 89(11): 4414 - 4419. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. L. Chen, W. T. Liu, M. C. Yang, M. T. Hwang, J. H. Tsao, and S. J. T. Mao A novel conformation-dependent monoclonal antibody specific to the native structure of beta-lactoglobulin and its application. J Dairy Sci, March 1, 2006; 89(3): 912 - 921. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. J. Boettcher, G. Pagnacco, and A. Stella A Monte Carlo Approach for Estimation of Haplotype Probabilities in Half-Sib Families J Dairy Sci, December 1, 2004; 87(12): 4303 - 4310. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
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 |
