RE: HYB: Arilbred SA's [was: Re: Re: [SpaceAgeRobin] New Member Bio Robert Benbow]

I've put a few arilbred beard hairs under the microscope and they were multicellutlar, the same as the bearded iris. I've also seen references that both arils and Eupogons have  multicelularbeard hairs.

PS: I got a research quality microscope ( circa 1950) for my birthday. Loads of fun and many interesting discoveries. I will put up some photos on my wesite in a few weeks, when time becomes more manageable.

Chuck Chapman

"Neil A Mogensen" <neilm@charter.net> wrote:

>Sharon McAllister wrote: "Depends on how you define "out there".  I've
>consigned a lot to the arroyo because they didn't meet my criteria for aril
>traits.  But one of my main goals has been to recover the wide, onco-like
>beards and the SA types tend to have narrow beards..."--Sharon McAllister
>
>It appears to me that Sharon's experience and aril-bred SA comments have
>genetic implications.
>
>First, the SA's tended to lean strongly to the Eupogon ancestry.
>
>Second, the form issue--noted also in pure tetraploid Eupogons in a post
>Michael M made some time ago, perhaps several months ago--Falls tend to be
>narrow, as if the capacity to form the appendage used up the potential for
>forming the fall structure.
>
>Both of these suggest that the SA trait is strictly on the Eupogon
>chromosome (no surprise there), and has to be present in more than a minimal
>way to effect SA extensions, and that the underlying linear structure from
>which the multi-cellular structure of the beard hair from the Eupogon
>ancestry is a necessary precondition for SA expression.
>
>Beard hairs that appear on your seedlings that have them, Sharon, are there
>ever any with some evidence the unicellular extension forming the arillate
>beard hair appears along the length of the SA feature?  Knowing your level
>of curiousity suggests you've looked at this question closely.  I'm willing
>to wager the unicellular hair *never* shows on the SA extension.  Am I
>guessing rightly?
>
>Neil Mogensen  z 7  Reg 4  western NC mountains
>
>

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