Studies on efficiency of RAPD primers in developing molecular profiles for genetic purity studies in soybean (Glycine max L.) cultivars

Abstract

Major advances have recently been made in our understanding of soybean genetics and of the application of new technologies to soybean improvement. Estimates of genetic relationships on the basis of the enzymes and molecular markers have been shown to be consistent with expectations based on origin and pedigree information. To identify efficient markers, that are to be used for genetic purity studies, polymorphism is the basic criterion. RAPD has been found to be an effective and efficient tool to evaluate and reveal genetic polymorphism in several crop species. In present study a total of 80 RAPD primers were screened, out of which 37 gave amplification and only 30 primers showed unambiguous DNA profile. Out of these 30 primers, 22 gave polymorphic banding patterns. It is evident from the result that, 30/80 primers tried (38%) provided unambiguous amplification and out of 30 primers, 22 primers (73%) were found to be polymorphic. Scorable 30 RAPD primers led to amplification of 120 fragments out of which 81 (67.5%) bands were found to be polymorphic. On an average, we got 4 bands per primer and 15 primers (50%) have been found to produce more number of bands than the average value which is encouraging. 8 primers were found to give 100% polymorphisms. Our results are indicative of the efficiency of RAPD primers towards development of molecular profiles.