Paul G Johnson-1 john0130 at
Mon Jan 31 08:39:51 EST 1994

What is the general view of the term and phenomena of "penetrance?" This 
refers to differential expression of a phenotype under various environmental 
conditions or genetic backgrounds, although the genotype of a plant or line is 
the same. It seems to be a rather vague term.

My question arises because I may be seeing differing "penetrance" of 
flowering genes in Poa annua due to environment and genetic background.

john0130 at

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