Genetics question from a Layman

[michael at news.epix.net]

If this isn't the proper group for this question, please let me know.

I know that an F1 hybrid of most plants generally has a greater 
productivity and vigor than the two parent plants.  After several 
generatons, this effect is lost.  Correct me if I'm wrong.

If the seed after a number of generations were raised in different 
locations (different soils,climate,etc.), would these environmental 
differences mutate them into separate plant types again, so that they 
could again be hybridized ot regain the F1 effect.

Reply by email would be greatly appreciated.  And thanks.

Mike P.




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