We recently collected a limited supply of semen on
two “outcross” pedigree Jersey sires who have polled heads and possess the most
desired Casein (protein) genes.
The goal in this outcross selection was to produce a
Jersey with superior constitutional strength, more resilient udders,
strong natural fertility, and ultimately more longevity
of production. Our current
herd has enough longevity that we only need to replace 10% of our cows
annually.
Keep in mind, our herd is managed as a grass
dairy—heifers raised on grass, cows fed a primarily grass ration (rotation
grazing in season, wrapped bale long stem winter forage) limited to 6 to 8
pounds of grain daily—imitating a typical organic dairy design.
For developing organic milk markets, the
desired Casein gene is “A2 Beta Casein”.
We have identified several such sires from outcross bloodlines, and are
linebreeding them.
Nutrition specialists believe A2 Beta Casein (found
active in fluid milk, yogurt, cultured cream) offers many health benefits,
especially to those suffering autoimmune diseases.
For dairies pursuing cheese making the
desired Casein gene is “B Kappa Casein” (cheese yield increases up to
15%). For dairies pursuing yogurt
making the desired Casein gene is “A Kappa Casein” (flavor
enhancement).
For dairies tired of dehorning, naturally polled
offers an escape from a dirty job that has been proven to set back calf growth
rates. We have some animals that are
homozygous (“pure”) polled.
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