Re: Debbie Rairdon
- To: i*@egroups.com
- Subject: Re: Debbie Rairdon
- From: i*@netscape.net
- Date: Mon, 01 Jan 2001 16:40:27 -0000
--- In iris-talk@egroups.com, arilbredbreeder@c... wrote:
> In a message dated 12/31/00 11:40:07 AM Mountain Standard Time,
> irischapman@n... writes:
>
> <<
> A good thought. When I look at photos of DR it would apear to be a
> pale yellow, and could also have the Recessive reduced Carotine
genes,
> thus the yellow could be flavenoid based? Walter thought that it
was a
> bee pod, in which case selective recall or a bee visiting more then
> one flower could account for it.
> >>
>
> The table in TWOI shows that Debbie Rairdon has several xanthophylls
(yellow
> pigments) derived from the beta-carotene pathway, although it was
not tested
> for specific carotenes.
>
> Lycopene is associated with the alpha-carotene pathway. Thus, the
presence
> of a dominant beta-carotene inhibitor in both parents, or the
hypothesized
> "switch" governing the carotene pathways, could explain the
surprising
> appearance of DR.
>
> I did not mean to suggest that this is KNOWN to be the case. It's
just a
> possibility based on known genetic factors. A visiting bee would
change the
> picture entirely!
>
> Sharon McAllister
Some further thoughts. I just realized that one of my planed
introductions for next year is a green from two pinks. Actually
green/yellow veins on the falls and with red beards. I'll post a photo
on iris-photos shortly. With the Recessive Reduced Carotine, the
beards are still red, and this is not the situation with Debby
Rairdon. The white with red beards or blue with red beards are the
usual results of RRC.
