Silver maple has great potential as a biomass feedstock. We selected 21 elite silver maple clones representing 7 provenances located on east to west and north to south transects across the natural area of distribution. In addition five different red maples including one commercial cultivar as well as four interspecific hybrids between red and silver maple were compared to the silver maples. DNA was extracted using a modification of the CTAB technique (Murray and Thompson, 1980). Polymerase chain reaction was used with random primers from the OPF series (1-20) and primers used by Krahl et al. (1993). Polymorphism was detected at high frequency. Greater polymorphism was observed between species than within species. However, we have observed DNA concentration dependent polymorphism. RAPD technology has potential for determination of genetic relationship among silver maple clones.
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