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Re: HYB: fall cyclic from IMM (was 06-48ARE Debrenee X Immortality
  • Subject: Re: HYB: fall cyclic from IMM (was 06-48ARE Debrenee X Immortality
  • From: irischapman@aim.com
  • Date: Thu, 24 Dec 2009 08:36:15 -0500


Each class of rebloomers has a seperate trigger for its rebloom.

"Whenever" such as forever Blue  from whenever it reaches maturity   fromend of  regular bloom time + 1 week until frost, whenever a    fan reaches maturity

Summer(direct)  Rebloomers  after maturity (about 6 weeks after spring bloom)  and when 6 days of min temperatures are in 15-21 C range, with about 3 weeks to mature flower stalk

Fall cyclic- when plants mature and night time length exceeds treigger length, plus 3-4 weeks t omature flower stalk

"Facilitative Vernalization"  when plant has been at maturity for an extended time (about 4 months).

A  Fall cyclic  rebloomer may not rebloom if it has a high leaf count maturity and slow growth.   Thus is a Fall cyclic rebloomer , but not  be able to muster resources.

A Fall cylic rebloomer is  mismatch of aphylla genes (photoperiod dormancy and no vernalization genes)  with cold dormancy and vernalization genes of regular bearded iris. Thus if you cross suitable plants, you could get a Fall cylic from parents that produce children mismatched for these gernes. That is one parent has one set of genes , and other parent has the othe set.   Often seen in a cross of aphylla with regular TBs or particulaly in F2 of this cross.

Chuck Chapman

-----Original Message-----
From: Autmirislvr@aol.com
To: iris-photos@yahoogroups.com
Sent: Wed, Dec 23, 2009 6:39 pm
Subject: Re: [iris-photos] Re: HYB: fall cyclic from IMM (was 06-48ARE Debrenee X Immortality

<<Forever Blue is not a cyclic rebloomer. >>
Chuck, is it not possible for an iris to carry and pass on cyclic genes without being a cyclic rebloomer itself?  Does FB never bloom in the fall, or is this classification based on it's earlier bloom? 
Betty W. 
Zone 6 KY

-----Original Message-----
From: irischapman@aim.com
To: iris-photos@yahoogroups.com
Sent: Fri, Dec 18, 2009 9:58 pm
Subject: [iris-photos] Re: HYB: fall cyclic from IMM (was 06-48ARE Debrenee X Immortality

I have gotten some fall cyclic seedlings from Celebration Song used as pollen on Forever Blue. And FB is not a cyclic rebloomer. The plant vigour imparted by FB enabled the cyclic genes to work.

Crystal Glitters is a rebloomer, so GACG13 may have cyclic genes but not rebloom as it doesn't have plant vigour needed to enable cyclic rebloom.

So that just leaves the one with Stunning Seranade, which is yet to be proved as a rebloomer.

Keep me posted.

Chuck Chapman

-----Original Message-----
From: Linda Mann <lmann@lock-net.com>
To: iris-photos@yahoogroups.com
Sent: Fri, Dec 18, 2009 4:50 pm
Subject: [iris-photos] Re: HYB: fall cyclic from IMM (was 06-48ARE Debrenee X Immortality

The three that I can think of were IMM X pollen from CELEBRATION SONG
(one fall cycle out of ~50 surviving seedlings), GACG13 (GOLDEN APPLE X

Hard to evaluate how "serious" these all are about rebloom, given my
growing conditions, but the first one is old enough and I have enough of
it planted to say it is definitely a cycle rebloomer. The second one
has fall cycle bloomed in one new clump the last couple of years (GACG13
has never rebloomed, but isn't that great a grower). The third is too
young to know for sure, but rebloom was not maiden bloom.

CSONG is in the rebloom checklist, but only from OR, WA, & Oz, & I don't
know what time of year it was reported to rebloom.

<When you get Fall cyclic rebloors from Immortality, is it from a cross
of Im X oncer or a cross of Im with a cyclic rebloomer?

Chuck Chapman>

Linda Mann
east TN

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