After electrophoresis, the gel was stained in ethidium bromide solution (5μg/ml) for 5 min and destained in tap water for 20 min. The gel images were captured using an image scanner Typhoon 9410 (Amersham Biosciences, USA). The DNA fingerprint patterns were analyzed by using fingerprint analysis software, GelCompar II, Version 5.1 (Applied Math, Belgium). Pearson product moment correlation coefficient was used to calculate similarities among patterns and a dendrogram was obtained by means of unweighted pair group method with arithmetic average (UPGMA)