According to the article referenced below, MH may no longer be readily available:
To quote a small piece:
'But some of the breeders were failing to ensure that their new queens were actually pass-ing on the hygienic gene to their new colonies. The gene is recessive, so the hygienic queen must mate with a drone bee that also carries the gene. This is not always the case.
“As a result, the colonies produced by those queens are not showing the hygienic traits,” she says. “If the queens mate with 20 males, at least half the males need to have the genes for hygienic behavior.”
Spivak says some California breeders are not ensuring this, so the “Minnesota Hygienic” queens they sell may or may not lay hygienic eggs. The queens she’d been supplying were not able to do their job, that is, create colonies of hygienic bees for those who wanted to buy them.
“Last year, I decided I’m not doing that anymore,” she says.
She will focus her efforts on supporting three Minnesota breeders, Jeff Hull, Mike Rufer and Mark Sundberg, who have been carefully managing their hygienic queens for several years now. Spivak says the hygienic trait now is fixed in their populations.'
I had two MH nucs overwinter with queens purchased from Olivarez in California last year and have done several walkaway splits to build them up to six hives. Now, I see they are calling them OHB Italians, and not MH on their website. Would hate to find that I can't get more down the road to boost my gene pool.
Anyone have any additional info?