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Re: HYB: Toughness

  • Subject: Re: HYB: Toughness
  • From: Linda Mann <lmann@icx.net>
  • Date: Sat, 16 Jun 2001 08:49:21 -0400

Thanks Chuck - that's pretty much what I expected, but I could imagine
there might be non-random things going on, given the peculiar nature of
iris genes (i.e., amphidiploidy).

The grandparent thing is interesting.  When you say a tough grandparent
increases the chances of tough offspring, is that also random?

<Toughness seems to be a combination effect. If both  parents are weak
for cold climates, most of the offspring will be weak. They all seem to
fit on a "Normal" distribution curve. The centre point of this
distribution curve is determined basically by the average toughness of
the parents. Thus two weak parents can produce an offspring that is
tougher then either parent but again most will be weak, some weaker,
some stronger. ... If one of the weak parents has a tough parent you
seem to increase your chances.  Chuck Chapman, Guelph, Ontario, Canada.
Zone 4/5>

Linda Mann east Tennessee USA zone 7/8


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