Genetic Support for a Trait in the ABCG2 Gene Affecting Milk Composition in Dairy Cattle
Author Information
Author(s): Hanne Gro Olsen, Heidi Nilsen, Ben Hayes, Paul R. Berg, Morten Svendsen, Sigbjørn Lien, Theo Meuwissen
Primary Institution: Norwegian University of Life Sciences
Hypothesis
Is the ABCG2 SNP (ABCG2_49) the causal mutation affecting milk composition traits in dairy cattle?
Conclusion
The study concludes that the ABCG2_49 SNP is likely the causal mutation affecting milk composition traits, while OPN_3907 can be excluded.
Supporting Evidence
- ABCG2_49 was the only marker in perfect linkage disequilibrium with the QTL.
- The C allele of ABCG2_49 has a negative effect on fat and protein percentages.
- Concordance between sires' marker genotypes and segregation status for the QTL was found for ABCG2_49 only.
- OPN_3907 can be excluded as the polymorphism underlying the QTL.
Takeaway
Scientists studied dairy cattle to find out which genes affect milk quality. They found that a specific gene, ABCG2, is important for how much fat and protein is in the milk.
Methodology
The study used a combined linkage and linkage disequilibrium approach to analyze SNPs in the ABCG2 gene region.
Limitations
The possibility that ABCG2_49 is merely a marker in perfect linkage disequilibrium with the true causal mutation cannot be completely ruled out.
Participant Demographics
All animals belonged to the Norwegian Red cattle breed.
Statistical Information
P-Value
0.0018
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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