Dominance

K. Mccourt keith at UTCC.UTORONTO.CA
Sat Sep 18 16:36:23 EST 1993


	We have observed unusual dominance/recessive relationships 
with severe alleles of abi3, which pleiotropically affect Arabidopsis 
seed development.  For a given abi3 allele, some phenotypes are 
dominant to wild-type while other phenotypes are recessive to the 
same wild-type allele.  Dominance is therefore a property of the 
phenotype rather than a property of the allele.  It is very difficult to 
see how this situation can be clearly represented with allele symbols, 
because the dominance relationship is not a property of the allele, but 
of the way dominance is assessed (i.e. how you analyze the phenotype).  
If this situation turns out to be a general case, using allele 
designators to indicate dominance could result in catastrophic 
confusion.  

	Has anyone else observed this sort of situation?  

Kallie Keith     keith at gpu.utcc.utoronto.ca 
Peter McCourt    peterm at gpu.utcc.utoronto.ca



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