Effects of Casein SNP on Milk Quality in Norwegian Goats
Author Information
Author(s): Dagnachew Binyam S, Thaller Georg, Lien Sigbjørn, Ådnøy Tormod
Primary Institution: Norwegian University of Life Sciences
Hypothesis
What are the additive and dominance effects of casein SNP on milk composition and quality in Norwegian goats?
Conclusion
The deletion in exon 12 of the CSN1S1 gene significantly affects milk quantity and quality, including taste, and its high frequency limits selection pressure in breeding.
Supporting Evidence
- The allele with the deletion showed significant effects on protein and fat percentages in milk.
- Overdominance effects were observed for milk yield and lactose percentage.
- The high frequency of the deletion allele limits the additive genetic variance available for selection.
Takeaway
This study found that a specific gene change in Norwegian goats affects the milk they produce, making it taste different and changing how much fat and protein is in it.
Methodology
575 goats were genotyped for 38 SNPs, and mixed models were used to analyze the effects on milk traits.
Potential Biases
Potential bias due to the limited number of farms and the specific population studied.
Limitations
The study primarily focused on SNP effects without considering potential interactions among SNPs.
Participant Demographics
Goats from six farms in southern Norway.
Statistical Information
P-Value
0.0011
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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