hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: Re: Anthocyanin-sidetracked

Christian wrote:
> BUT... I stumbled on a notation that caught 
> my attention... as it may relate
> more directly to personal goals.  
> In a post relating to anthocyanin dated Feb
> 08, 2003 Neil Morgensen stated that "The pigments 
> involved in the blacks tend
> to penetrate through the I factor."  
> This caught my attention because I have
> noted that "green" irises sometimes come 
> from "black" pedigrees, and have
> wondered how that was possible.
> If I understand the context correctly 
> he's seperating two types of "white"
> irises... recessive white and...well I'm unclear.
> Somebody help me clear up the fog?  
> And if anyone has pictures of irises with
> this "penetration" of dark pigments through 
> the I factor, I would find them
> very interesting.

Somewhere I remember a discussion of Iris aphylla having different anthocyanin pigment pathways that might not be inhibited (or at least not fully) by the "I factor", which as I understand it, is the typical dominant white -- I think of it as "I" for inhibition of anthocyanins. Another gene in this series is the I(s) <sorry I can't figure out how to make the "s" tiny> which is responsible for the dominant amoena pattern -- think inhibition of anthocyanin in standards. These "I" genes are at a different locus (chromosome location) than the plicata / glaciata series, so they are inherited independently of those.
The reason why I mention Iris aphylla, is because that species is commonly found in the ancestry of black irises. So it wouldn't be surprising at all to find anthocyanins coming from these irises, that the I factor doesn't inhibit.

Sorry, I don't have any pictures of this phenomenon for you, but I think that's what Neil might have been referring to.

And to further muddle things up for you, I've got what should be glaciata seedlings in a second generation from KUPARI (a glaciata white Iris pallida) crossed with Iris suaveolens. I say "should be" because suaveolens has contributed some pale anthocyanin pigmentation that is showing up only in the falls. When I had first discussed this with Neil, years ago, when we were only seeing the first generation, we talked of it as a "dominant amoena" gene - like I(s), but now that I've been working with it for a little longer. I'm starting to think of it differently. I'll see if I can find a picture and repost it to Iris-Photos. So you can see what I mean.

I hope I've helped clear the fog more than I've made it foggier <grin>
Take care, Tom

To sign-off this list, send email to majordomo@hort.net with the

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement