Re: HYB: pigments/gray?

Thanks Neil.  As always, it will take a while for all this to soak in
and be understood, but it's something to chew on.

Since one parent, CELEBRATION SONG, is pink, or tttt, (ignoring the blue
on the falls for the moment) that would be providing at least tt to the
seedling, which would be yellow or cream, since there are only two t's,
unless the other parent contributes more t's.  Right?

So if I understand what you're saying, you're not surprised that with
such low dosage of t (assuming none came from the other parent, BEHOLD A
LADY), that the standards might look gray.  I.e., have some (not
visible) pale yellow/cream/greenish plus maybe some pale blue from one
or both parents to look grayish.

And since one parent (BEHOLD A LADY) has a lot more yellow (which is an
odd shade of yellow, greenish?, or maybe just in contrast with standard
color) in the falls, and the other has noticeable blue in the falls,
that makes the gray dark enough to be conspicuous.

So, possibly, the standards and the falls have the same pigments, just a
lot more in the falls (I inhibitor reducing blue pigment in the
standards and whatever the yellow inhibitor is in yellow amoenas
reducing yellow pigment in the standards).

??

BEHOLD A LADY has to have at least tt, because I got some pink seedlings
from this same cross.  Maybe I will dig out pix of the babies from this
cross and post.  They are all poor quality irises, some truly dreadful,
but such an amazing range of colors - every one was different.

On iris-photos, Neil said:
<I don't see any trace of yellow, even palest yellow, in those
standards, but gray tones in iris
                   usually indicate both oil soluble and water soluble
pigments are present, but in fairly low dosage.
                   The co-pigments that make blue-violet anthocyanins
look their bluest don't mix well with pale
                   cream--they look gray.

                   The yellow or cream that is Tttt for the
lycopene-conversion factor (pink) tends to be a warmer,
                   brighter cream or yellow than those with lower
dosages of the recessive "t."  Some yellow
                   pigments have a faintly greenish tone--a dull, grayed
green at best, but when the conversion
                   factor is present three times the color warms and the
two pigments mix visually to some
                   delightful tones.  I suspect the unique magenta color
of PATIENCE is the result of a warm cream
                   and a warm violet present in the same flower.
There's no gray tone to the color.   Neil Mogensen  z 7 western NC>

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

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