Re: [SpaceAgeRobin] Re: HYB: BC patterns with arils

Michael asks:

>>Whats your opinion? Do these BC patterns come only from the TB side or
>>are BC possibilities also from the Aril side?

Sharon says:

> I'm sorry, but that is one of my unsolved puzzles.  These patterns most 
> often turn up in 1/4-breds, sometimes in 1/2-breds. Not yet in anything 
> more than 1/2 aril.

I think Sharon's observation suggests a neither/both situation.  Variegated 
foliage and broken color in the blooms have both appeared in the TB X AB 
seedlings where neither parent exhibited the traits.  I believe it's a 
result of the chromosomes not being homologous that results in the 
appearance.  I do not believe it would be a trait that would transmit into 
the next generation, rather simply a result of a bad fit.  Sort of like 
corns arising from ill-fitting shoes.  The variegated foliage plants have a 
low survival rate, but of the two that I've managed to get to bloom size, 
both had broken color blooms.  There are, as it turns out, other means of 
having variegated foliage than simple maternal inheritance.  Walter Pickett 
gave some details once about it concerning other plant genera.  The scenario 
he gave was a reasonable explanation for the result.  It would also fit well 
with the broken color showing up in the blooms.  That would make the 
phenomenon somewhat different than the broken color pattern showing up in 
TBs and different from the variegated foliage exhibited by the two 
variegated I. pallida plants.

The effect has not shown up in seedlings from TB X TB or AB X AB where the 
chromosome sets are either tetraploid or balance amphi-diploids.  There are 
a lot of unsettled growth habits in TB X AB seedlings.  If they live long 
enough, they tend to settle down (lots of twinning or even more multiple 
divisions of the rhizome, change in plant appearance - e.g. going from 
appearing to be a full-sized TB to a plant with slender, curved leaves). 
The broken color blooms and variegated foliage are something they don't 
outgrow.

On the other hand, those seedlings from TIGER HONEY X AB all had broken 
color on the falls to some extent.  Not on the standards, though.

Donald Eaves
donald@eastland.net
Texas Zone 7b, USA 




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