Re: Sports...several definitions


Jim:

>I believe the most important criteria to consider in defining a sport 
>is to determine if the cause of the change is genetically controlled, 
>that is, is the plant in question different because of gentic 
>reasons.

Any nuclear mutation or cytogeneic change that effects the genotype 
may well qualify the new "offspring" as a sport, but what about 
transposible elements?  If a transposible element moves from one 
location to another location and results in a sport via a "position 
effect", does that really change the genetic makeup of the plant?  

Joe Halinar

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