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  1. Re: Small Scale VSH genetics and hybridization

    There's a difference between theorising and speculation - but you're free to characterise my thinking as you choose.

    Considering the dynamics of co-evolution from the perspective of a population...
  2. Re: Small Scale VSH genetics and hybridization

    Yes. But that doesn't say: 'Accept the first reasonable sounding explanation offered and close the enquiry"

    The fact is that predator-prey relations are a two-way dynamic affair. Both strive for...
  3. Re: Small Scale VSH genetics and hybridization

    How about the last paragraph of the quote you've just provided?:

    "Alternatively, the behaviour of the bees may
    be affected by the presence of either drone
    or worker larvae in such a way that the...
  4. Re: Small Scale VSH genetics and hybridization

    That's looking from the mite's perspective

    Bees prefer mites that prefer drone cells because the colony can carry on without many drones. Swarms can get away; new queens can be mated - sometmes...
  5. Re: Small Scale VSH genetics and hybridization

    Pat,

    One of my main management system items is to make sure that the bees own natural defences are not interfered with. As part of that - and this is a personal theory - I think that the tendency...
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    Re: VSH bees and hybridization

    Look over their website Eduardo:

    http://www.toleranzzucht.de/en/home/the-association-of-tolerance-breeding/

    "ASSOCIATION OF TOLERANCE BREEDING (AGT)

    Effective selection within a large...
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    Re: VSH bees and hybridization

    The reason many aspiring tf beekeepers fail is simple ignorance of the realities of selective husbandry. What bothers me is the effort some subsequently go to find a sciency sounding rationale for a...
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    Re: VSH bees and hybridization

    There's also:

    Breeding for resistance to Varroa destructor in Europe
    Ralph Büchler, Stefan Berg and Yves Le Conte
    http://www.apidologie.org/articles/apido/full_html/2010/03/m09147/m09147.html
    ...
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    Re: VSH bees and hybridization

    Its here, in Frequently Asked Questions:
    ...
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    Re: VSH bees and hybridization

    That's Spivak's/Reuter's quote, not mine: and I think its written in a simplified manner to be accessible to as many beekeepers as possible.

    Mike (UK)
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    Re: VSH bees and hybridization

    Yes I could have been clearer; 61 hives now; in my 4th year of non treatment. I agree it doesn't say much about the success or failure of the enterprise - they could all be this year's swarms and...
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    Re: VSH bees and hybridization

    While you are considering your options Eduardo, here are a some relevant links:

    A Sustainable Approach to Controlling Honey Bee Diseases and Varroa Mites
    Marla Spivak and Gary Reuter...
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    Re: VSH bees and hybridization

    That's an invitation to a bunfight that will ruin a useful thread by the master of ad hominem. PLB has never, as far as I can tell, succeeded in overwintering a single hive without treatment.
    ...
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    Re: VSH bees and hybridization

    I'd formed the impression that Eduardo would prefer to try to introduce vhs genes while maintaining as much as possible his local race. It seems to me that there is a tension between this aim and...
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    Re: VSH bees and hybridization

    Sure. But given that a choice must be made between home-raising the defenses and speding that effort with genetic material from elsewhere, the effects of taking the second path need to be evaluated....
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    Re: VSH bees and hybridization

    It works. That's all you need to know. Just figure out how to make it work in your circumstances.

    Of those many (additive) genes controlling vhs, some will likely be recessive, some dominant. ...
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    Re: VSH bees and hybridization

    John Kefus's take on this sort of approach is clear: you don't need to know how things work; you just need to know that they will work. This sort of theorising, in the hands of amateurs, is really...
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    Re: VSH bees and hybridization

    It works in a backyard by incrementally, steadily, and systematically selecting for the traits you want and against those you don't. Its husbandry - in the proper sense of - rather than intensive or...
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    Re: VSH bees and hybridization

    I agree. Breeding should be approached from a distance, building in that which demonstrably works by running real field tests (untreated bees over several years competing on productivity).

    But...
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    Re: VSH bees and hybridization

    Eduardo,

    I think your best option is; first to import resistant bees as locally as possible - that might include nearby feral stock as well as John Kefuss' (less local) material. Secondly, to...
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    Re: VSH bees and hybridization

    Love it! My thought for the day!

    Mike (UK)
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    Re: VSH bees and hybridization

    Slippery slope Roland.

    How much great breeding material has never been manifested because beekeepers couldn't be bothered to make an effort?

    I think any reasonably diverse population has...
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    Re: VSH bees and hybridization

    My understanding is that the molecular basis for some mite managemet behaviours is known. The Sussex University research effort uses molecular testing to select queens, thus removing uncertainties...
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    Re: VSH bees and hybridization

    Traditional systematic selective propagation of more resistant strains.

    Treatment as a managemet method achives the precise opposite. The result is perpetual dependence.

    Its very simple. ...
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    Re: VSH bees and hybridization

    The critical factor is the presence of treating apiaries. If there are few, then your own bees and and any nearby ferals (that by definition manage their own varroa) will supply the mite-management...
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