[SpaceAgeRobin] RE: Space Age Genetics

There is another possibility to consider. The gene for SA may be partially dominate like PBF. Thus the plants that seem to have a repressor gene may actually be lacking any SA genes and thus the seedlings don't have the necessary 3 dosages of SA needed to have an appendage. This same thng happens with PBF. A lot of PBF x non pbf have PBF offspring but these same non PBF plants can , when crossed with another non-PBF of same genotype, can produce PBF plants. There are some cultivars that don't havew any PBF genes and when crossed with a PBF plant have all seedlings green based foliage.

Thus it could take 3 or 4 SA genes to produce an appendage. The shape of the appendage is controlled either by another allele or by a seperate gene modifying form. The results are sugesstive to me of a seperate gene function.

Chuck Chapman

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

>Francelle, don't be to quick on discarding those non-SA's you mention:
>
>Francelle reported: "My Mesmerizer crosses have bloomed fourteen plants with only two showing any SA appendages.  Mesmerizer crossed with one of my seedlings (Pink Lenox X Celebration Song) has bloomed six plants with no SA qualities, or any other for that matter, and they are out of here."
>
>One of the possible explanations of the appearance out of not-quite-nowhere of the first SA's plus some other anecdotal data is that there is a suppressor or "normalizer" genetic element covering up SA performance in some varieties.  You may have stumbled across such in the cross of (Pink Lenox X Celebration Song)--or it may be the conditions weren't right for SA traits to show up--as in the example of Devonshire Cream.
>
>DC had no space age characteristics for Suttons until moved to soil with higher pH.  I regularly has them for Bill Burleson, and occasionally here in my soil, wavering between acid and lime-rich neutral at best.
>
>One of our test-cross types is aimed at discovering these--with the fair degree of certainty that ROMANTIC EVENING is one of the target varieties for the inhibitor, or whatever it is.  WILD WINGS probably has it too.  Mike Sutton reported a short list from his memory of others, including QUITO, DYNAMITE  and others that give few if any SA offspring.
>
>Your seedlings may be sources of information about this matter.  Since Mesmerizer is a parent, the other seedling may be one of our possibles that carry a no-SA's-in-the-F1.  Would you be willing to share that seedling, or any of the non-SA progeny from the cross with Mesmerizer?  They could yield important information for us.
>
>Neil Mogensen for SAGE  z 7 Reg 4, western NC mountains
>
>

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