It is an interesting question.
Linda, are there other seedlings from this cross that you can tell us
about?
I checked in registry, and it would certainly seem as if HoM acts as
if it is alternative yellow. 'Howdy Cloud' by Jim Hedgecock is pure
white, no hafts and from HoM X Ruffled Sunshine.
Unchained Melody, also pure whiite from HoM X Soap Opera, which has a
yellow rim, so has genes for yellow.
Renown is a plicata, very lightly marked.
HoM obviously has "I" gene. No need to speculate on how many copies of
"I" unless you are dealing with a large number of seedlings, and can
properly evaluate. Like about 20 seedlings at least. Getting two
non-anthocyanin seedlings out of two has about the same proabilty as
tossing a coin and getting two heads in a row. About one out of four
chances.
I have often stated that haft marks are not part of plicata genetics,
but a seperate factor. Plicatas often carry this extra factor, as no
one breeds for clean hafts on plicatas, as what is the point. Therefor
plicatas often also carry genes for hafts. It would seem as as Matrix
does not have "haft" genetics.
Chuck Chapman
-----Original Message-----
From: Linda Mann <lmann@lock-net.com>
To: iris-photos@yahoogroups.com
Sent: Tue, Sep 29, 2009 5:27 am
Subject: [iris-photos] Re: HYB: another HoM X Renown sdlg
Yes, this one and its sib that I posted previously are both clean
white,
no yellow at hafts or elsewhere that is noticeable - I will check to
see
if any is in the throat.
RENOWN has some anthocyanin in the falls, esp in cool weather, but HoM
doesn't have any, so (here I go...) I think that means HoM is IIII and
RENOWN is at least Iiii, maybe more. (right?) I am still not sure I
understand what these various dosages look like. I thought I did, but
now ....
As for yellow/pink/orange pigments, I'm not sure I understand white
either. It seems to be inherited the same way that white (inhibitor of
anthocyanin) is inherited for blue pigments - i.e., cumulative/dosage
effect of the genes that cause white, in this case, like mixing paint.
Shoulders seem to be inherited separately & I haven't grown enough
seedlings & parents with shoulders to have a clue how that works.
Other
than to suspect that it also has a dosage effect for distribution of
pigment (not intensity of color).
& with at least two different yellow pigments involved, it seems like
there could be more than one genetic path to white operating
separately?
together?
<I don't understand white. This bloom looks very clean. I've not grown
RENOWN, but from its photos, I'd have expected a lot more shoulder
color
(yellow) and some veining or haft marks when used with HARVEST OF
MEMORIES, which I have grown. Those don't show at all in the photo.
I've
had white appear (not too often) in crosses from non-white parents and
was stumped on what happened for it to occur.
Donald Eaves
donald@eastland.net
Texas Zone 7b, USA>
