HYB: question - heredity of rebloom?

What's the probability of getting rebloom seedlings from non-reblooming
parents but reblooming grandparents? (i.e.,
non reblooming sdlng (IMMORTALITY x CELEBRATION SONG)
crossed with
non reblooming sdlng (HARVEST OF MEMORIES x CELEBRATION SONG)?  Is it
zero, or just nearly zero?

Is the probability of rebloom higher if the reblooming grandparent on
both sides is the same rebloomer (i.e., (IMM x CSONG) X (IMM x VANITY)?

I'm trying to prioritize seeds from this year (another bumper crop of
pods, tho most have low seed counts - average is less than 40).  Will
soak and stratify some in the fridge to get early germination, plant
some outdoors in Nov, and store the rest for a bad year.

I have several crosses of involving seedlings and other people's
introductions that don't rebloom in this climate (and may not rebloom
anywhere) but are from at least one reblooming parent.  Some of the
reblooming parents are repeat rebloomers like IMMORTALITY, others are
twice a year (mostly HARVEST OF MEMORIES), some only rebloom reliably in
other climates.

From what I've read here in the past, heredity of rebloom is
complicated, so maybe this is another unanswerable question.

I keep thinking of Sterling Innerst's article desribing how he started
out trying to create rebloomers, thinking it would be easy to recapture
rebloom from reblooming grandparents crossed with non-rebloomers,
discovering that it doesn't quite work that way.

--
Linda Mann east Tennessee USA zone 7/8
East Tennessee Iris Society <http://www.korrnet.org/etis>
American Iris Society web site <http://www.irises.org>
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