Re: REB: aphylla rebloom genes
iris@hort.net
  • Subject: Re: REB: aphylla rebloom genes
  • From: L* M* <1*@rewrite.hort.net>
  • Date: Sun, 04 Jan 2015 14:23:43 -0500
Hi Bionic Betty - nice to have you back & able to type some!
Yes, a lot of my oncers used to do that pretty regularly out in the gravel rows during long duration summer drought. 

On 1/4/2015 12:21 PM, Betty Wilkerson wrote:

Digging back in the older emails . . . Linda, during 2007 (most severe drought I've had in 10 years) almost all of my reblooming seedlings dropped their foliage.  Most but not all of my regular iris did the same.



Betty Wilkerson
Zone 6 KY
autmirislvr@aol.com




-----Original Message-----
From: Linda Mann <101l@rewrite.hort.net>
To: iris <iris@hort.net>
Sent: Wed, Dec 24, 2014 11:42 am
Subject: [iris] REB: aphylla rebloom genes


Several thoughts/questions about aphylla & rebloom

Chuck, do you know if the aphylla photoperiod response is dominant or
recessive?  Do you know if it is responding to shortening days,
triggered in summer, or actual daylength?  If the latter, any idea what
daylength?

I've been looking at seedling differences in the range of green to brown
foliage this time of year, before it gets cold enough to kill foliage to
the ground (if it ever does this winter), wondering what happens with an
aphylla photoperiod winter dormancy cross with something that tries to
grow all winter.

Before I started breeding my own irises, I noticed that the cultivars
that I bought that did the best here usually dropped foliage during
drought and during winter.  Pallida tends to also drop foliage in really
cold winters here, but I've not noticed it in summer.   Discussion on
iris talk way back when concluded that it could be influence of one or
more of several of the diploid ancestors - variegata, pallida, aphylla.

Most of my keeper seedlings (which made it fine through last winters dip
to zero F with no snow cover) try to put on more green whenever it's
somewhat warm and do not drop foliage during drought. (There's a lot of
seedling selection pressure for drought tolerance/deep root systems.)

I've always suspected there is some aphylla influence in the GPBrown
rebloomers because of the abundant branching, but maybe aphylla isn't
the only source of that type of branching?

Linda Mann
Merry Christmas Eve everybody

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