Re: Re: HYB: rebloom breeding
iris@hort.net
  • Subject: Re: Re: HYB: rebloom breeding
  • From: C* C* <d*@rewrite.hort.net>
  • Date: Tue, 2 Dec 2014 12:16:53 -0500
Growth of increases indicate that bud set has occurred, so fans would be mature.
Linda, I very, very, much doubt that you will get any bloom from Preferential vernalization rebloomers in your climate, unless it is on first year plants primed in zone 9 garden. The range of growth time after rebloom will be in a very narrow range, selected by millions of years of evolution. Breeding can make changes on length of growth time, but it would need a very systematic approach and you would need a zone 9 garden to work on it. Might be able to change it by a week, perhaps two, but not much more then that. Evolution has very carefully selected a limited range. The early ones will have been eliminated from gene pool by death. So will the later ones. Genes will have been eliminated. So only way to get a change that would be useful to you would be by a mutation. Then you would need a means to be able to identify that this has happened. And it would likely need two mutations to line up. the one producing signal and the other one responding to it. And if they are recessive, how will you find them?
Also consider that the plants with PV evolved in an environment with winters seldom going below freezing. So will be strongly associated with tender genes as far as cold weather is concerned. 

I did try Belvi Queen several times.  Didn't thrive here.

Chuck Chapman


-----Original Message-----
From: Linda Mann <101l@rewrite.hort.net>
To: iris <iris@hort.net>
Sent: Tue, Dec 2, 2014 10:37 am
Subject: Re: [iris] Re:  HYB: rebloom breeding

Thanks again, Chuck.
Could you elaborate on this a bit more (again)? Is the presence of baby 
fans starting a good indicator of mother fan maturity?  I might have
enough energy to note that ;-)  Are there other ways to tell whether or
not a fan is mature?

On 12/1/2014 7:52 PM, Chuck Chapman wrote:

observe maturity of  fans .


Thanks for joining in, Francelle. Good to be reminded that rebloom
requirements (genetic and environment) vary a lot for different
breeders.  The three of us (you, me, and Chuck) pretty much cover the
range of challenging climates - hot dry, erratic hot wet, and cold short 
growing season.

Like you, I have some different options for getting rebloom because
unlike Chuck, I do have a long growing season.  So some of the
preferential/CA rebloomer genes can give me additional (re)bloom, <if> I 
can combine those genes with the fastest maturing genes and ones that
can continue rapid maturity in humidity and heat.

I haven't tried hard to work with your Belvi Queen seed babies yet, but
hope to have something suitable to mix with them this coming year. Down 
to 2 of the strongest growing survivors.  I've put pollen on them, but
it's been a low priority up till now, so haven't really worked at it,
and no luck so far.  Let me know if you'd like starts.

Chuck, have you grown Belvi Queen?  It's been the most
reliable/persistent summer bloomer here, not fertile for me either way
so far.  Not as weak a grower as Tea Leaves, and comes from GP Brown &
Gibson breeding, so should have at least a chance at rebloom for you.

Linda Mann zone 7, back to balmy spring weather again, lows in the mid
to upper 40s, highs upper 50s to low 60s.  Grow newly planted irises,
grow. ;-)


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