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Published on: December 23, 2018
Genomic selection in relation to bovine milk composition and processability
Maria Glantz1, Helena Lindmark Månsson, Marie Paulsson
1Department of Food Technology, Engineering and Nutrition, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden. maria.glantz@food.lth.se
The Journal of Dairy Research
|December 1, 2011
Summary
Genomic selection uses direct genomic values (DGVs) to assess milk traits. This technology enables early selection of dairy cows for improved milk production and quality.
Area of Science:
- Animal Genetics
- Dairy Science
- Nutritional Biochemistry
Background:
- Genomic selection (GS) is an advanced breeding technology utilizing direct genomic values (DGVs) or genomic enhanced breeding values (GEBVs).
- Understanding the relationship between DGVs and specific milk traits is crucial for practical application in dairy breeding programs.
- Current milk recording schemes may not capture all desired milk composition and technological properties.
Purpose of the Study:
- To evaluate the correlations between DGVs and various milk traits.
- To assess the potential of genomic selection for improving milk nutritional value and processability.
- To explore how genomic selection can be practically implemented in the dairy industry.
Main Methods:
- Analysis of morning milk samples from Swedish Holstein cows for composition and technological properties.
- Obtaining DGVs for individual cows across multiple traits including yield, milk index, and udder health.
- Calculating yield quotas for fat/milk and protein/milk.
Main Results:
- Significant linear correlations (P<0.10) were found between DGVs and milk parameters.
- Correlations were observed for protein (P=0.002-0.097), fat (P=0.024-0.055), and mineral profiles (P=0.001-0.099).
- Significant correlations were also identified for cheese characteristics (P=0.004-0.065).
Conclusions:
- Genomic selection provides detailed information on milk traits beyond traditional recording schemes.
- DGVs are valuable indicators for selecting cows based on desired milk composition and quality.
- Genomic selection offers an efficient tool for early selection in dairy breeding for targeted milk production.
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