I have always read that it takes 4 shots of
the t factor to get to a tangerine beard. Wilma
Vallette, in her chapter on tangerine pinks, the last chapter in her book, says
that both parents have to carry the t factor twice. I'm
going to spend some time looking back through my hybridizing notebook to see
just what irises in my crosses might factor in. When I dead-end at the
CGWs, there is still a question. What TBs did White use? Did he use
some of those old TBs that, along the way, were carriers of pink genes?
(Vallette does give us a list of possible original carriers for the pink genes,
as does Warburton.) Then I have to see what modern TBs might lie behind my
crosses. I'll let you know where all this leads.
Vincent Christopherson of Texas has an article in
the AIS bulletin of April 2007 (pages 43-49) on helping along iris seed
germination; he calls the method "stratification." Sharon McAllister has
said the proper term is not "forced germination" but rather "enhancement".
I don't agree with her, as I don't feel like I'm "enhancing" the seed. I'm
hacking away at it and taking things off the seed, forcing it to germinate
because it wasn't going to do it itself right now. Besides, I borrowed the
term from Sam Norris and the Tearingtons.
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