Abstract
In this study, three molecular markers including random amplified polymorphic DNA (RAPD), inter simple sequence repeat (ISSR) and simple sequence repeat (SSR) were used to evaluate genetic variation of green tiger prawn Penaeus semisulcatus collected from two geographically isolated environments; located in the Manifa, Arabian Gulf, Saudi Arabia and Ataka, Suez Gulf, Egypt. Genetic parameters included the percentage of polymorphism (P%), effective alleles (Ne), Nei genetic diversity (H) and Shannon index (I), which were calculated based on molecular data. All three marker systems distinguished genetic variation of P. semisulcatus in various levels. The highest polymorphism (91.30%) was obtained with SSR, followed by ISSR (82.26%) and RAPD markers (62.04%), respectively. Our results indicate that SSR appeared to be the best suited molecular assay for assessing the genetic variation between genotypes of P. semisulcatus. The present study indicated that Manifa and Ataka genotypes were closely related. Moreover, the analysis of variability could require more than one DNA-based molecular marker techniques.