Thank you, Chuck, for this explanation. Since I want pink iris seedlings, I would
be better off crossing these with pinks rather than with other whites from pink
parents. I know about the pigment
inhibiting genes. I just didn’t
know how they are inherited.
Francelle Edwards Glendale, AZ Zone 9
-----Original Message-----
From: iris-photos@yahoogroups.com
[mailto:iris-photos@yahoogroups.com] On
Behalf Of irischap
Sent: Friday, October 28, 2005
9:34 AM
To: iris-photos@yahoogroups.com
Subject: [iris-photos] Re: HYB:
Pink genetics
I find that the beard has a good story to tell. The
beards on all of
these are tangerine red, thus all are tttt plants.
The white and the
lavender with red beards are tangerine
plants (tttt) with the
repression of the cartenoid pigments
(alpha-carotene, beta carotene,
lycopene etc) by four sets of the gene that
repress carotene. It still
expresses in the beard even if not on petals.
Ususlly crossing one of
these with a catenoid expressed plant will produce
all cartenoid
plants if none of this gene or as few
one half if the cartenoid
plant has three of the repress cartenoid gene. a
white x white or x
lavender (or blue) with red beard will have all
seedlings with red
beard but no carenoid pigment in the flowers
petals
For a dark top with tangerine beard use Fogbound
or one of its children.
Iheritence of anthocyanin is independent of what
ever occurs with
carotene.
Chuck Chapman
--- In iris-photos@yahoogroups.com,
"FRANCELLE EDWARDS"
<fjmjedwards@w...> wrote:
>
> I have been reading with great interest and a
tiny bit of understanding
> the genetic explanations of the relationships
of white, pink and
> anthocyanin pigmentation. My main
hybridization goal is the development
> of unique, vigorous pink and pink blend TB
irises. I have been
> surprised at how often I get white irises
from my crosses which are
> nicer formed and more vigorous growers than
their pink siblings.
>
> I am posting three unrelated seedlings that I
hope to cross with each
> other to see what I get. Each has SA
genes, and might provide useful
> information for the SAGE project. 65-25
A is from Mesmerizer X Pink
> Champagne. It is not SA, but it is a
rebloomer. When fresh, the
> standards are lavender. Would this make
it some kind of dark top since
> the anthocyanine is expressed there but not
in the falls?
>
> 12-18 A is from Elegant Girl X
Happenstance. It has a very light pink
> tint and big red beards. I believe the
beards end in small fuzzy horns
> making it SA. What might happen if I
cross it with 65-25 A which has
> better form?
>
> 67-22 B is from Pond Lily X Twice
Thrilling. It is obviously SA, and
> has lavender in the standards and the horns
which project from red
> beards. Both parents have considerable
anthocyanine in their blended
> pink. I have absolutely no idea what
might turn up if I can cross it
> with the other two.
>
> This sure becomes a lot of fun.
>
> I might understand all the T and t genes
better if I can relate them to
> my own babies.
>
> Francelle Edwards, Glendale, AZ
>
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