Re: Re: Purple Leaf Base
- Subject: Re: [iris-talk] Re: Purple Leaf Base
- From: J* a* C* W*
- Date: Wed, 14 Nov 2001 21:36:42 -0700
John,
The expression of plb (pbf) in TBs is essentially inherited as a single
gene dominant effect. As you noted in another message on this subject, that
is why a pbf cultivar always has at least one parent that also expresses
pbf. The extent of the pbf obviously varies from one cultivar to another,
which means that there must be modifying factors that can be selected for
as well as the basic gene that governs pbf expression. There is a transient
expression of pbf in some cultivars (usually only visible early in the
spring) that may be inherited differently from the more persistent pbf that
is usually observed.
Jeff Walters in northern Utah (USDA Zone 4/5, Sunset Zone 2, AHS Zone 7)
jcwalters@bridgernet.com
----------
> From: jpvhook@aol.com
> To: iris-talk@yahoogroups.com
> Subject: [iris-talk] Re: Purple Leaf Base
> Date: Wednesday, November 14, 2001 7:03 PM
>
> --- In iris-talk@y..., irischapman@n... wrote:
> > I'm not as quick to dismiss the idea of selection
> increasing/decreasing the amount of plb. There may be something to
> it. From my own experience with variagated foliage, selection makes a
> huge difference. With Canadian Streaker there can be very large
> differences between plants and selection certainly was necessary to
> help increase the amount of streaking. The same thing with other
> variagated foliage plants. Why not the same thing with plb. It could
> be much the same thing, a factor in the endosperm rather thenin the
> genes.
> >
> > Does anyone know of a case where plb was passed on to a plant via
> the pollen parent? Variagated foliage is only passed on through the
> pod parent.
> >
> > I have done a little work with this but havn't kept as close a
> watch as I should.
> > --
> > Chuck Chapman, Guelph, Ontario, Canada. Zone 4/5
>
> > Chuck
> Plf con be passed by pod or pollen parent I have been working
> with this for some time. It is a ressive gene and dosen't express
> its self in a heterozygous form it does vary in its expression.
> I think in a 2 dose it's light,3 dose it's darker,& 4 dose if in
> fact that has been done would be the darkest homozygous.I have one
> Seedling the plb is streaked but not the foliage.
>
> John Van Hook
> >
> >
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