Phenotype: The gene underlying the production of alpha-s1 casein in goat's milk shows polymorphisms which affect the amount of protein and fat produced. Higher levels of alpha-s1 casein are associated with the best cheese making, and research suggests that low levels may be associated with reduced milk sensitivities for some people.
- E, F, N = associated with low content of alpha-s1 casein
- A, B = associated with high content of alpha-s1 casein
Breeds appropriate for testing: Many breeds including common dairy breeds such as Alpine, LaMancha, Nigerian Dwarf, Nubian, Oberhasli, Saanen, Toggenburg
Explanation of Results:
- Goats with any combination of "high" variants (A/A, A/B, B/B) will produce high amounts of alpha-s1 casein.
- Goats with a combination of a "high" variant and a "low" variant (A/E, A/F, A/N, B/E, B/F, B/N) will produce intermediate amounts of alpha-s1 casein.
- Goats with any combination of "low" variants (E/E, E/F, E/N, F/F, F/N, N/N) will produce low amounts of alpha-s1 casein.