摘要：Mirabilis jalapa L. is a gardening plant which growth easily plantedbecause their beautiful color and flower’s ornaments. The aims of theresearch were to find out the variation of isozyme band of peroxidase (PER)and their close relationship of M. jalapa cultivated based on their differentflower’s color. The method used in this study was polyacrilamide gelelectrophoresis. The collecting data were analyzed using calculation ofassociation coefficient (Gower’s coefficient) with cluster analysis used forsimilarities of their arithmetic. The results showed that in M. jalapa werefound 21 variation of isozyme bands of peroxidase (PER) from 8 Rf of 0.04;0.08; 0.20; 0.28; 0.36; 0.48; 0,60; and 0.64. M. jalapa with white and red nodesflower’s (BIN) and white and red line flower’s (GAR) have the nearestgenetic relationship with similarity index of 0.76. M. jalapa with white andred nodes flower’s (BIN) and white and red line flower’s (GAR) joined withred flower’s (MER) on 0.73 of similarity index then joined with whiteflower’s (PUT) on 0.64 of similarity index and yellow flower’s (KUN) on0.49 of similarity index. At least, M. jalapa with orange flower’s (ORA)joined with M. jalapa cultivars on 0.41 of similarity index
