REFERENCE NEEDED: evolution of flower morphology

[valbert at nybg.org]

     Can anybody supply the reference for a recent (last 5 years) paper 
     that demonstrated major alteration of floral morphology (pollination 
     syndrome) via a single ca. 10kb stretch of DNA?  I think that the 
     region was mapped using RAPDs.  I have not been able to find the 
     reference.  
     
     Thanks very much, 
     
     Victor Albert.