Egg-shaped ruantiao baisha mutant and 30 loquat germplasms from China,Japan and New Zealand were used as plant material and contrast,respectively in this paper. Identification of the mutant germplasm were constructed with SRAP molecular marker based on the morphological investigation. 18 pairs of primers were selected from 96 pairs of SRAP primers. Finally,135 loci were detected,of which 102 were polymorphic and the polymorphic percentage was 75. 6%. The genetic similarity ranged from 0. 53 ~ 0. 89. 31 whit...