Abstract
A total of 90 Pyrus pyrifolia cultivars from southeastern China and Japan were used to assess genetic diversity and overall similarity using eight Amplified Fragment Length Polymorphism (AFLP) primer combinations. Eighty-eight percent of the 429 bands produced were polymorphic. Unweighted Pair Group Method with Arithmetic Mean (UPGMA) cluster analysis of these data support two major groups, mostly consistent with their geographic distribution. Most of the P. pyrifolia cultivars from southeastern China formed one group and most of the Japanese cultivars were in the other group. However, some cultivars from southeastern China and Japan clustered together. These results support our previous studies which indicated that some Japanese pear cultivars are genetically similar to those from Zhejiang and Fujian Provinces of China. Nevertheless, most Japanese pears are genetically distant from Chinese sand pears.
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