Total of 27 biotypes of pear,cultivated in the Protection District of Dangshansu Pear,Dangshan County,Anhui Province were analyzed by the established technical system of amplified fragment length polymorphism(AFLP)for studying the genetic diversity and mutant's identification in genus Pyrus.Three pairs of selective primer screened out from 36 pairs of selective ones were used in the amplification and more than 50 bands were amplified by each pair of selective primer.The size of amplified fragment was 30 to ...