Re: HYB: more pink

Just a little more grist for the pink theorists: 1) when the tangerine factor 
is present in two doses in diploids, the plants are not pink. Anybody know 
what happens when it is present in three doses in triploids? 2) what about 
pink and yellow blends like Black Hills Gold in which there are yellow areas 
and pink areas on the same petal. Surely all the cells are four dose (or are 
they?) genotypes and should be pink.

The relationship between anthocyanins and carotinoid pigments is easily over 
simplified. While brown and red may be the result of an interaction of the 
two classes of pigments, they are not the only result.  Two sibling varieties 
Kevin's Theme and Cosmic Wave differ only in presence of carotinoids in KT 
and the lack in of carotinoids in CW. In CW the anthocyanin  expresses as 
blue, but in KT it expresses as blue violet. The wonder of their parent Edith 
Wolford is that the interaction appears to not take place and the falls are 
blue in spite of the fact that yellow is theoretically present in the falls.

Please take Dr. Werckmeister with a grain of salt. His mechanistic 
explanations of genetics are often a stretch e.g. the notion that whites with 
a pulp leaf base have a filter of some sort at the base of the flower that 
prevents purple coloring getting to the flower. Or how about the idea that a 
cross between a pure dominant and a pure recessive will occasionally produce 
a seedling in which has somehow gotten four doses of the recessive gene.

Fred Kerr
Sacramento 


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