PlumX Metrics
Embed PlumX Metrics

Chromosome Substitution Effects Associated with κ-Casein and β-Lactoglobulin in Holstein Cattle

Journal of Dairy Science, ISSN: 0022-0302, Vol: 75, Issue: 4, Page: 1097-1104
1992
  • 31
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

Allelic variants of κ-casein and β-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 β-lactoglobulin only. Transmitting abilities for fat percentage and the exchange of protein and fat (protein yield minus fat yield) were influenced by κ-casein genotype among offspring sire 1. The B allele of κ-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 β-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.

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know