Re: REB: HYB: rebloom breeding
iris@hort.net
  • Subject: Re: REB: HYB: rebloom breeding
  • From: L* M* <1*@rewrite.hort.net>
  • Date: Thu, 27 Nov 2014 07:05:41 -0500
That's too restrictive - I'm in zone 7, Betty is zone 6, not sure which Mary Lou is - zone 6 I think. 

I refuse to believe that my reblooming seedlings are an illusion! ;-)

On 11/26/2014 8:32 PM, Chuck Chapman wrote:

The preferential ( warm climate rebloomers) have nothing to offer me, or
most  breeders of rebloomers who do not live in a zone 9 area. It is an
illusion for anyone not in a zone 9 (perhaps not for some zone 8).
One more question - if an individual cultivar/seedling has preferential rebloom genes, is it possible for it to also have a set of recessive rebloom genes plus a set of cycle rebloom genes?
Assuming the answer is yes, let's see if I got this - in our zone "9" breeding programs, we are combining preferential rebloom genes (some of which also may or may not have recessive rebloom genes and/or dominant fall cycle genes) with cold climate tolerance (all of which have either recessive "summer" or dominant fall cycle rebloom genes).
With added cold tolerance (resistance to light freeze damage), these seedlings have a longer potential season to do the preferential rebloom thing, if the season is just right in zones 6-8.
The 'real' zone 9 (CA/OZ) rebloomers that can bloom in July would have to have bloomed in ...5 months earlier would be Feb, so more likely these bloomed in late fall - Nov/Dec. & the ones that bloom in Aug would have 'spring' bloomed in March. 

Do TBs start blooming in Mar in zone 9?
Is this where the idea came from that to get rebloomers, it's best to cross the really early blooming ones? Never have been able to understand the logic on that one - those are the ones most likely to be frozen out, here anyway.
So that 5 months thing would make cycle rebloomers pretty indistinguishable from preferential rebloomers here - first bloom in April/May, 5 months later is Sept/Oct. And in colder zones, they are, not surprisingly, reblooming in Nov. Some of these are very reliable rebloomers in parts of zones 6 & 7 where late freezes aren't an issue.
Thanks Chuck, I think I understand some more about what might be going on with some of these occasional rebloomers that I'm getting. plus it makes some sense out of the ones that try to rebloom in late OCt/Nov here. I am definitely going to have to start irrigating to sort out the seedlings that may be cycle/preferential vs the recessives that I want.
Tho it may not be of any use to you or others in zones north of 6, the ability to grow well enough to be a reliable preferential rebloomer with good form and fertility is a good thing. Not a first generation rebloomer of the genetic type I want, but will have some of those genes in the first generation and a decent probability of recapturing them in the next generation. 

Have a good Thanksgiving, Chuck!

And Happy Thanksgiving to everybody else as well.

;-)

Linda Mann

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