Re: re: HYB: genetics questions....
iris@hort.net
  • Subject: Re: re: HYB: genetics questions....
  • From: &* t* <t*@cs.com>
  • Date: Sat, 5 Jun 2010 15:03:12 +0200
Hello Linda,

what a same we can't exchange our seedlings:
i toss the big flowered ones and you toss the small flowered ones!
i would especially love to get the ones that rebloom in the summer!

It would save me a lot of work!

Loic


  ----- Original Message -----
  From: Linda Mann
  To: iris@hort.net
  Sent: Saturday, June 05, 2010 2:48 PM
  Subject: [iris] re: HYB: genetics questions....


  Steve, like Christian, I'm no expert, but also as Christian says,
  generally, it's not a good idea to try to get back a trait that's lost
  to the F1, mostly because there are so many other traits that have to
  line up just right at the same time.  My guess is that if you are
  working with strongly inbred lines where all the other traits are pretty
  uniform in the parents and seedlings, and there is just one trait you
  are trying to recapture that got lost, it might be worth it.  But I
  dont' really know.

  Trying to increase flower size on seedlings is something I've been
  attempting also, working with some of the really tough rebloom lines
  here - IMMORTALITY and HARVEST OF MEMORIES.  Both are highly prone to
  giving small flowered seedlings, but not always.  If I ever had a small
  flowered seedling from these lines that also summer bloomed here, I
  might try to work with it, but my impression so far is that it's a trait
  that seems to follow along with 'weedy' median type growth.  And having
  grown on a few of them for more than a year just to see if they would
  rebloom, have decided that's really a waste of space and am tossing them
  as soon as they bloom now.

  An added issue with bloom size is that it can be so strongly affected by
  growing conditions.  Some (esp the west coast/Oz) intros often have both
  stalks and blooms miniaturized here - cute, but not looking like TBs.
  Seems to result from inadequate moisture/too much heat right
  before/during bloom season.  They look like MTBs - registered at 36"
  tall, but only about 18 to 20" tall here, with blooms in proportion to
  the stalk.

  Which makes it hard to evaluate seedlings.  I have used some of these
  for pollen, and so far, while form of seedling bloom isn't bad, none so
  far have had what I would call large (i.e. Schreiner sized) blooms.

  Hope that helps a little.

  In this group (and from hybridizers), it's been a lot easier to find out
  about inheritance of pigments and their patterns than about inheritance
  of other traits like stalk height, bloom size, disease resistance.  Let
  me know if you find out more specific information.

  Or if you have room to do some experiments, let us know what you learn!
;-)

  Linda Mann east TN USA zone 7

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