So far, I've only had 2 maiden blooms from this
cross. The rest of the seedlings should have their maiden bloom this coming
spring, so there really is not any other siblings to compare that specific
cross with at this time.
However, I've had other maiden blooms from SLY FOX.
All these were maiden blooms as well and not all of their siblings have bloomed
yet either.
From my 2009 notes:
BENGAL TIGER x SLY FOX produced 3
yellows with white veining around the beard.
SLY FOX x TROPICAL BUTTERFLY produced 1 medium
grey/blue-brown self.
SLY FOX x BURST produced 4 yellows. 3 pure yellows,
and 1 with honey/rust standards and a
honey/rust rim on the falls.
BROADWAY X SLY FOX had 5 maiden blooms
this spring late in the season - most had heat damage as we were into 100 plus
degree heat when they bloomed.
This cross produced 2 yellow selfs;
1 yellow sibling with brown veining
around the beard;
1 sibling had light yellow standards with
rusty-brown blue/purple blend falls edged with a yellow
rim;
AND *** 1 very similar to the 'rich yellow' SLY FOX
x LADY CELESTE seedling, only it's a light lemon yellow, with a smaller
circle around the beard but in white (brown veining on
shoulders & around the beard), AND has the identical (same honey
color) ringed wash on the falls only somewhat lighter in
color.
Those 2 'look-a-like' half-siblings could easily
pass themselves off as siblings. None
of these seedlings reproduced a red beard, all had yellow or orange beards.
Maybe some of this information may
help???
~ Margie V.
Oro Valley, AZ.
----- Original Message -----
Sent: Friday, July 17, 2009 4:45 AM
Subject: [iris-photos] Re: HYB TB Photo:
SLY FOX x CELESTE correction
There are two known paths of inheritence of yellow. the regular yellow
and the "alternatie yellow" which I have spoken about several
times.
The regular yellow, production of cartenopid pigments is
dominant over
non production of cartenoids. Regular dominant cartenoids
are pinks,
regular yellow part of oranges, and yellows, both alpha and
beta-carotene. To get a non yellow we have to have cartenoid production
shut down previous to production of lycopene (shows as pink when not
converted to carotenes). this shut down is a recessive genetic control.
So in order to prevent regular cartenoid production we need four sets
of the recessive reduction of cartenoid genes. Thus when a yelow
(include pinks and oranges here) is crossed with a plant that has no
cartenouids (white or blue) all of the offspring will be yellow,
baring presence of the recessive reduction of cartenoids renes in the
yellow cultivar. Thus all or a significant number of seedlings will
have yellow.
A white with a red beard, such as Shy Fox has four
sets of rrC
(recessive reduction of cartenoids). Lady Celestra is also a
rrC
cultivar. If there was a yellow underlay, it would be violet or
purple, not blue.
Thus the question of wher the yellow comes
from.
Now on to the "alternative yellow" which shows up in orange
cultivars
primarily, but also in yellows with tangeringe factor
beards.that is
red beards. This yellow is a
recessive, unlike normal
cartenoids ,
which are dominant.
Now back to Sly Fox. this has a
red beard, which strongly suggests
that it carries the alternative yellow
or possible has alernative
yellow plus a repressor of this on petals ( I
havn't checked into of a
repressor of alterrnative yellow this, but it is
a good possibility).
This all leads to the possibility that Lady
Celestra carries the
recessive genes for "alternative yellow". I did a
quick check of its
parentage, and didn't see anything obvious.
The
seedling you showed was a yellow with an anthocyanin wash over
falls to
give its pattern.
Based on the analysis given, if it is an "alternative
Yellow" then it
would be a recessive, and unlike regular yellows,
(especially in
consideration that it should have four sets of rrC) would
produce no
yellows if crossed to a blue, or white. But would produce some
cartenoid plants if crossed to a white with red beard.
To be sure
of any of this and provide more information I would need
some numbers.
Such as details of plants produced, from say about 10,
possible more
seedlings from this cross. This should be enough info to
do a chi-square
analysis and be sure of what is happening genetically.
Of course as
David says, there can be recessives hanging around ready
to do their
thing. But a chi-square analysis should be able to tease
this out, with a
enough numbers.
=0
AFor more on "alternative yellow" check previous
posts, here and on
iris-talk
Chuck Chapman
4b.
Re:
HYB TB Photo: SLY FOX x CELESTE correction
Posted by: "David
Jewell"
d_jewell@sympatico.ca
djewell.geo
Thu
Jul 16, 2009 11:42 am (PDT)
I would have to say that the
statments about gentics and what should or
should not apear seem somewhat
nieve. While yellow cross yellow have a
higher chance of producing yellow
there are no guidelines to say it
must produce yellow. If there were very
simple formulas for these
things then everyone would have the perfect iris
of the perfect color
and form that we are always looking
for.
Genetics be it human or plants are always a crap shoot and can
recess
backwards many generations or even make a step forward.
To:
iris-photos@yahoogroups.com
From:
irischapman@aim.com
Date:
Thu, 16 Jul 2009 14:31:28 -0400
Subject: [iris-photos] Re: HYB TB
Photo: SLY FOX x CELESTE correction
I'm very interested in more details
of crosses of Sly Fox producing
yellows. If crossed to something that
is yellow it would be expected to
produce yellows. But in a cross to
something that doesn't have yellow
it should not20produce
yellows.
A yellow from Sly Fox X Lady Celeste is a mystery. As
reduction of
yellow is supose to be a recessive, none from this cross
should have
yellow.
Ther have been rumours of a dominant yellow
repression gene , but no
clear evidence of it's exsistence.
By
the way, there is no "dominant White" gene. There is a
dominant
repression of anthocyanin gene, but it has no effect on
inheritence of
yellow.
Chuck Chapman
