Abstract: A leaf color mutational strain and the wild type of Oxalis triangularis were identified preliminarily at the molecular level. DNA-pooling method was used in this study to establish the DNA-pools of the wild type and the mutational type，respectively. These DNA-pools were used as templates for RAPD-PCR and ISSR-PCR，respectively. Two specific RAPD primers，i.e.，S76 and S118，and two specific ISSR primers，i.e.，UBC818 and UBC868，were selected from 70 RAPD primers and 100 ISSR primers，respectively，producing 6 specific bands. And these specific bands could identify the two DNA-pools mentioned above. The sequencing result of the absent specific band，S118 700-800，in the mutational type showed that the sequence contained a gene coding for subunit Ⅶ，i.e.，PsaC protein，in photosystemⅠ. The results indicated that compared with the wild type，the genetic material of the mutational strain had changed indeed，and it could maintain stable in the given subcultures in this study.

Key words: Oxalis triangularis A. St.-Hil., leaf color mutation, somaclonal variation, RAPD, ISSR