Re: HYB: Umbrata trait and origin

Last year, I went through the HIPS website and noted which of the older
irises were "classic umbrata" (standards and rims matching color and
lighter than fall overlay).  There were a lot of them, DOMINION being
the one that caught my attention the most, since it is in the background
of so many modern irises.

Interesting that PINNACLE is the source of all the yellow/pink amoenas
in modern irises.  Also surprising that other yellow/pink amoenas
haven't shown up from different lines, but similar breeding, whether
those genes come from I. variegata or from the wild tetraploids.

I guess this means that the inhibitor (however it works - lack or
presence of enzymes, precursor pigments or all that complicated stuff I
don't pretend to know or understand) of pink/yellow in standards and
rims is recessive & rarely present?  Or usually lethal in a double dose
in a diploid?  Or both?

Many of the pedigrees I've looked at for both blue or pink/yellow
amoenas (rims or not) have both parents the same color/pattern, but not
all.

Are there non-umbrata pink or yellow amoenas?

--
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>
talk archives: <http://www.hort.net/lists/iris-talk/>
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online R&I <http://www.irisregister.com>

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