Re: Re: REB: genetics
iris@hort.net
  • Subject: Re: Re: REB: genetics
  • From: C* C* <i*@aim.com>
  • Date: Sun, 14 Nov 2010 11:14:22 -0500
 That is basically what I ment.

But it is only the mother rhizome blooming that resets? vernalized state to
non-vernalized state. Grandmother rhizomes did their thing year before, and no
more influence on blooming? triggers.

I think PV (CA/AU only rebloomers)? have secondary factors only by accident.??
It may be possible to , by an entensive? planting of multiple seeds from a
cross, to select the earlier rebloomers, and then breed those, to eventually
reduce resting period time, so you get early enough rebloom for colder
climates. But then you have to? find a way to make them hardy enough to endure
climates other then Medeterainan? Climates.? The preferential? vernalization
is an evolved mechanism for mild climates, where sometimes winter is not cool
enough to provide vernalization . So plants that are PV will not have
hardiness genetics, by nature

Chuck Chapman





-----Original Message-----
From: Linda Mann &lt;lmann@lock-net.com&gt;
To: iris@hort.net
Sent: Sun, Nov 14, 2010 8:47 am
Subject: [iris] Re: REB: genetics

   Betty, when I say secondary traits/genes needed for rebloom, I mean  things
that contribute to the capacity to grow fast enough to reach  maturity in time
to respond to triggers for bud set.  Chuck's theory is  that the fan can't
respond to a trigger for bloom until after the fan is  mature.  Or until
&lt;a&gt; fan in the clump has had the trigger set, if it's  that kind of
genetic makeup.?
?
 I think that's what he's said. If his theory is correct, undug clumps  where
the great great grandmother rhizomes are still alive and connected  to all the
descendants would keep the trigger set in all the fans, for  that type of
rebloom.  A great thing for a garden plant! ;-)  I like  that theory, Chuck.?
?
 I think secondary traits includes all kinds of genetic variation in the  way
plants respond to climate and soil.  Ph, temperature regime, whether  or not &
how fast growth stops and starts in response to
fertility/moisture/temperature changes, wind, whether or not entire,  mature
leaves die or just lose tips in response to heat/cold/drought,  root
architecture, response to density (i.e., looseness) of soil etc etc  etc.
CA/Oz rebloomers seem to grow really fast with the right  fertility/moisture
help.?
?
 One of the questions I have is how hard it will be to transfer some of  those
rapid response characteristics of CA/Oz July/Aug bloomers to  plants that will
thrive in our climate, esp erratic temp/moisture.  One  of the &lt;big&gt;
differences I've noticed between CA/Oz selections in  general in comparison to
those that thrive here (other than sensitivity  to sudden frost/freezes) is
root growth rate. I don't know if it's the  response to shock when dug and
shipped while rapidly growing or inherent  ability to make rapid root growth
in general that makes the difference.  ?Not a good CA rebloomer, but CA bred
TREASURED sure combines well as  far as vigor & health are concerned.?
?
 I keep hoping that just getting a root system that thrives in my growing
conditions combined with those CA/Oz rebloomers will yield more "summer"
bloomers here.  Give me another 10 or 15 yrs to find out...?
?
 End of season bonus from Bayview this year included a couple of CA
rebloomers from Lauer that have put on phenomenal root growth, not just  top
growth.  Any of you know if DELTA LADY or STRUCK TWICE bloom Jul/Aug  in CA??
?
 Linda Mann east TN USA zone 7?
?
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