Re: Re: HYB: Predictions

Hi

I'd love to see a blue grounded plicata but can't imagine how one could
occur, since the plicata gene  controls the distribution of anthocyanins
(blue, purple rose - pigments) but not xanthines (yellow, orange, pink -
pigments). These two groups of pigments occur in different layers of the
flower and are controlled by completely different genes. Hence no yellow or
orange plicatas. Similarly unless there was only some partial expression of
the plicata gene. it's had to inagine a plicata with a blue or rose ground.

I always find it helpful when looking at a flower to try and see the two
colour layers separately. Lady Friend is a mix of rose under a layer of
yellow.
Chuckles is a peach with the rose anthocyanin expression being controlled by
both  ameona and plicata genes.

It also helps for breeding to be able to visualise the expression of the two
colour systems separately.

I find broken colours interesting because the expression of this seems to
usually affect both xanthines and anthocyanins but in different part of the
flower. So in e.g.Tiger Honey you get mostly brown (expression of rose and
yellow) but there are flashes where only the yellow or rose are expressed
and also areas where both colour expressions are switched off giving a white
flash.

Colleen Modra
Adelaide Hills
South Australia  Zone 8/9

colleen@impressiveirises.com.au
www.impressiveirises.com.au



----- Original Message ----- 
From: <Autmirislvr@aol.com>
To: <iris@hort.net>
Sent: Sunday, January 18, 2004 11:54 PM
Subject: Re: [iris] Re: HYB: Predictions


> In a message dated 1/17/2004 9:58:10 PM Central Standard Time,
> showtime@bbtel.com writes:
>
> > am I understanding you correctly that you are getting a few plic with
blue
> > ground?
>
> Sorry, about this confusion.  All of the particular seedlings I was
> discussing have Kepple's THEATRE in them to some degree.  The ones that
have THEATRE in
> them tend to be a bit 'different' than your regular plicatas. To my eye,
they
> are prettier.
>
> Christian, apparently blue ground doesn't happen in plicatas?  I'm not
versed
> on plicatas but I don't remember seeing one.  I had a seedling that
bloomed
> with a washed or hazy blue ground this past spring.  An iris friend versed
in
> genetics was ecstatic and said how great (and rare) this is. My concern is
that
> it is maiden bloom and will not hold as a more mature rhizome blooms.
>
> Also, we had a light freeze that twisted the stalks on SUMMER RADIANCE
which
> was the next plant over.  One stalk of this one plicata seedling was
twisted
> and lost from the freeze. The color could be an anomaly caused by the
freeze or
> a combination of both.  Only time will tell.
>
> Another cross with THEATER in the parentage is giving some seedlings with
> near blue markings and blue or purple beards.  This was what I was talking
about
> earlier that I liked so well.
>
> I really like blue beards. I even prefer my blues to have blue beards.
One
> of the reasons I've always liked BLACKOUT is the the big wooly blue beard
> perched on it.
>
> Betty W. in South-central KY Zone 6
>
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