Re: TETRAPLOIDS - DIPLOIDS

--- In sibrob@y..., THEO1415@a... wrote:
> Can anyone tell me what is the difference between these?   Are 
there others also?  What makes them tetra or dip.   And what are the 
characteristics? Tets bigger?   Dips more fragrant?   Please someone 
explain this to me?   
> Theo1415@a...

I might add to what Harold says in his reply---

Based on what limited number of tetraploids I've seen so far:

Some characteristics (especially in Siberians) of tets
     -thicker stem that does not have the characteristic grace of 
most Siberians
     -heavy substance, sometimes so heavy the flowers are stiff 
looking, but weather resistant perhaps.
     -lots more complicated genetics.  There should be a wider range 
of variation in seedlings, more variation due to "dosage" levels--the 
more times a certain gene is present, the more effect it has.  This 
may be true of the violet and the pinkish red pigments, each and 
separately.  The yellow in Siberians may show up in new ways, 
perhaps, as well....and perhaps new color types, patterns.  This 
happened in Tall Beardeds.  It might happen in Siberians.
     -new possibilities in hybrids with other beardless types, with 
fertile offspring.  I think this is already being widely explored.  
True?  It will be interesting to see what comes of all this, and 
whether the results of doubling chromosome counts offsets the loss of 
much of the characteristic charm of historic Siberians.

     I find the fat, full, ruffled flowers of many new ones very 
attractive, but certainly different from what the ancestral types had 
as virtues.  But I could say the same about bearded irises.

Neil Mogensen  Zone 7a, western NC





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