Re: HYB: Breeding for Variegated Foliage

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There are several kinds of variegation in tall bearded iris resulting in 
quite different streaking patterns. In part this has to due with the tissue 
layer in which the mutation occurs. It seems that all cases which have been 
investigated are "extra nuclear" mutations involving DNA in the cytoplasm 
around the nucleus of the cells. Since none of this material contributes to 
the pollen, variegation does not transmit through the male line. It might be 
transmitted through the ovum, however, if the mutation occurred in a cell 
layer which contributes to the ova. If the mutation is in a cell layer which 
does not contribute to the ova, no transmission to the next generation is 
possible.

One interesting variegated variety is Striped Jade from John Weiler. Dr. 
Weiler has written that this variety (one of several seedlings with 
streaking) appeared in a bed of seedlings which had been sprayed with Surflan 
to control weeds. I don't know if there was a suggestion that the dosage was 
higher than recommended, but my impression was that he thought the 
variegation in this case might have been induced by the Surflan. Perhaps this 
would be something to try with the regelia seedlings.
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