Study on Pear (Pyrus spp.) Germplasm Resources Collected at the Protection District of 'Dangshansuli' by ISSR Markers.

The article presents a study which explores the genetic diversity and phylogenetic relations of pear (Pyrus species) by Inter-Simple Sequence Repeat (ISSR) markers. From the collected pear's germplasm resources used in the study, the genetic identity of Dangshan group is the highest and with the closest genetic distance among the variety. From the analysis of ISSR, the genetic distance of Oriental and Occindental pear is the farthest and its genetic identity is lower among the pear'svariety.