Re: HYB:Diploid Irises with Arils and Arilbreds

Bill Shear wrote:
> 
> ....
> 
> If diploid pure arils are used on diploid TBs, there should be a better
> chance of seed set than if diploids were used with tetraploids in either
> combination.

Could you expand on this? Is it just that there would be a lot more 
unmatched chromosomes in the latter case?

And how about fertility? Do really wide crosses with at one diploid
parent 
need an unreduced gamete from that parent (those parents) to be fertile?

If so, would not the dip-dip crosses be much less likely to be fertile 
than dip-tet, needing two unreduced gametes rather than one?

I realize I'm in way over my head here, so please try to be gentle 
in your explanations or corrections or whatever.

Gerry
-- 
g*@mediaone.net
Gerry Snyder, AIS Symposium Chair, Region 15 RVP
Member San Fernando Valley, Southern California Iris Societies
in warm, winterless Los Angeles
my work: helping generate data for: http://galileo.jpl.nasa.gov/
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