Re: HYB: umbrata trait

Linda Mann's description of the origin and workings of the "Umbrata" is right
on!

The best way to get a grasp of what she and I have been calling "Umbrata" is
to look through the HIPS "Quick Fix" file of photos, taking note of *Iris
germanica,* DOMINION and BRIGHT HOUR.  All three of those have the fall
overlay of color that we're talking about, *germanica* on a background only
slightly lighter than the fall overlay, DOMINION with a lot of color in the
standards and in the narrow rim showing on the fall, and BRIGHT HOUR as a
"recessive" amoena--but, as I've tried to convince Linda, the recessive part
of that is the white ground color.  The fall overlay, if BRIGHT HOUR or any
other classic amoena (Wabash-type) is bred to a self, is going to give
seedlings of all sorts of colors, but half or more of them will have at least
some degree of wash or toning or spot showing on the fall.

The term applies to violet, blue or similar anthocyanin pigments in my
understanding.  The fall pattern in yellow or pink can occur with Umbrata, but
is not the same thing genetically and is definitely not dominant.  The umbrata
overlay is decidedly dominant but appears to be affected by dosage....I
think.

Neil Mogensen  z 7 western NC mountains.

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