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Thread: Drones Haploid and Diploid.

  1. #11

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    Hi GG
    I don't know if it is still used in bees (it is in chickens)
    Line breeding involves breeding of two separate lines
    Each line is inbred to fix the characteristics
    The two lines are crossed to get hybrid vigour that's the one that is sold
    Black Rocks are bred this way that's why you can't breed your own by just crossing a Barred Rock with a Rhode Island Red

    In bees that could only be done by instrumental insemination
    Any open mating means multiple drones even when trying to breed say Amm
    I think one or two people on here might have some experience of Instrumental Insemination
    On its own its a bit of a dead end



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    Last edited by The Drone Ranger; 29-01-2016 at 10:53 AM.

  2. #12

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    Do drones and queens have the same number of csc genes?

  3. #13
    Administrator gavin's Avatar
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    Quote Originally Posted by Black Comb View Post
    Do drones and queens have the same number of csc genes?
    There is just the one csd gene in Apis. Workers (and diploid drones) have two copies of it (=alleles) of course whereas regular drones have just the one copy.

    If you go here and then type 'csd' in the search box you can see the gene sitting in its place on chromosome 3. Click on and you can see the DNA sequence and other technical stuff.

    http://www.ncbi.nlm.nih.gov/genome/g...context=genome

    OK, you might need help to find which bit to click so here is the DNA (and RNA) sequence:

    https://www.ncbi.nlm.nih.gov/nuccore...97&to=11146230

    It used to be thought that most bee populations have 15-20 versions of this gene - clearly a gene that bees need to have in lots of flavours to make everything work well for them. A study in 2012 showed that if you look across the different types of Apis mellifera you can find 79 versions.

    https://www.ncbi.nlm.nih.gov/pubmed/21687972/

    That is the full and frank answer .

    G.

  4. #14
    Senior Member Jon's Avatar
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    Quote Originally Posted by busybeephilip View Post

    should of added that females with same sex alleles eg C/C are not viable as the bees normally destroy these eggs
    These are not females. Having two identical sex alleles is what produces a diploid drone.
    Homozygous at the CSD locus = male.

  5. #15

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    http://www.moraybeedinosaurs.co.uk/a.../breeding.html
    Line breeding is interpreted differently sometimes in bee breeding it seems
    This link was quite interesting to resd

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  6. #16
    Senior Member Greengage's Avatar
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    Interesting link, Also spent an hour listening to that video on Queens I knew very good tks for link

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