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Re: HYB: Twins

Sterling wrote:
>What have you heard/read about twin seedlings? 
'The Genus Iris' (Academy of Sciences - USSR)1984
Shows diagrams of twin seedlings emerging.
Wilma Vallette discusses twining in 'Hybridizing for everyone'. She 
suggests this is rare, although I would say I have about 3 pairs from 
150 emerged seedlings so far. She also suggests that they may be 
identical, or fraternal, and that one may be tetraploid and one diploid, 
or that it is possible that two diploid seedlings may occasionally arise 
from tetraploid parents. I don't know if any serious study has been done 
into twinning in iris. I would be interested to hear of any other 
literature. I believe Vallette's information mostly comes from iris 
robins and is gleaned from the personal experience of iris hybridisers. 
It is not a scientific work, but this only makes it more interesting to 
read. I hope you can get hold of a copy. - Jan Clark

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