Re: Re: Tetraploid tectorum for tectorum X bearded


Back in grad school some 25 years ago, we mixed colchicine with agar and let it gel in a petri dish.  Then we stuck the cotyledons into the gel for the required time.  We left the roots up in the air, or else turned the dish over on its cover so the roots would at least hang down.  though the roots were in the air, the ari had a humidity of about 100%.
We were crossing wheat, rye, and barley in all combinations.
Walter

Diane Whitehead <voltaire@islandnet.com> wrote:
A friend has gone back to earlier methods of using colchicine only on
cotyledons, so that the root remains unaffected and strong. He is not
working with iris or hemerocallis, but the results may be similar.


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