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Peloric Phrag

This is a discussion on Peloric Phrag within the Paphiopedilum, Phragmipedium, Cypripedium IN BLOOM forums, part of the Orchid Photography category; Catfan I just need to correct you a little bit here. Everything is normaly 2N. ...

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  1. #11
    JB_Orchidguy's Avatar
    JB_Orchidguy is offline Senior Member
    Join Date
    Apr 2005


    Catfan I just need to correct you a little bit here. Everything is normaly 2N. N represente the Halfploid number. In humans that would be 23 since our number of chromosomes is 46. Colchicine hinders the mitosis and prevents a cell from making the initial split after duplication of the chromosomes. So since the cell didnt split it now had double chromosomes, and then goes through the process of devision again. It douplicates it already doubled chromosomes and then splits. Each new cell from there on has double chromosomes. Those are 4N plants. You get a 3N plant by crossing a 4N with a 2N plants giving you a net of 3N. 3N plants are normaly sterile BTW.

    Intertesting bloom too Sue.

  2. #12
    Sue's Avatar
    Sue is offline Evil Genius
    Join Date
    May 2004
    Myrtle Beach, SC


    BTW, if you all want to read an awful lot about polyploidy and colchicine, take a look at this thread, from the hybridizing FAQs:

    In the meantime, the second bloom on this one turned out exactly the same: lipless. The third, however, is fully formed. Maybe it worked this issue out and won't ever do it again. Maybe it'll keep going back and forth. Regardless, it's interesting, and I'm pretty happy with it.

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