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AssigneeNew Zealand Dairy Board
InventorsJeremy Paul Hill, Michael John Boland, Andrew Faulks Smith
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This invention is based on the discovery that there is a relationship between the fouling rate of milk during processing into milk powder products and the .beta.-lactoglobulin phenotype of the cow whose milk is being processed. Milk from .beta.-lactoglobulin BB phenotype cows has a much lower fouling rate than that from .beta.-lactoglobulin AA phenotype cows. The invention consists in a method comprising testing milk from identified cows for the presence of non-fouling .beta.-lactoglobulin variants and recovering and maintaining that milk separate from the fouling variant containing milk. The non-fouling variant or blends of at least 30% by weight of the non-fouling variant are further processed into milk powder products. The invention also consists in a method of selecting a diary herd having only .beta.-lactoglobulin non-fouling variant phenotype cows.
A method of selecting milk for milk powder manufacturing properties which comprises testing milk from identified cows for the presence of variants of .beta.-lactoglobulin and selecting those cows whose milk contains any non-fouling variant and does not contain any fouling variant, and milking separately the non-fouling variant milk producing cows and recovering and maintaining their milk separately from milk from any other source.
A method for selecting breeding cows which produce daughters whose milk is non-fouling which comprises determining the genotype of said cows and selecting those whose daughters produce milk which does not contain the A-variant of .beta.-lactoglobulin.
A method for selectively breeding bulls which produce daughters whose milk does not contain the A variant of .beta.-lactoglobulin which comprises determining the genotype of said bulls and selecting those which daughters which produce milk which does not contain the A variant of .beta.-lactoglobulin.
Dependencies are inferred from the claim text.