Genetic diversity of mango (Mangifera indica L., Anacardiaceae) detected by RAPD markers.

The study was designed for assessing the genetic relatedness/diversity among selected mango cultivars/genotypes available in Bangladesh. Among the sixty mango genotypes; twenty-five released, twelve exotic/introduce and rest of the indigenous or local representative genotypes, which were selected for a random amplified polymorphic DNA (RAPD) analysis. Out of the 40 random decamer primers surveyed, 11 amplified genomic DNA of all the genotypes. A total of 104 fragments, ranging from 200bp to 2400bp, were amplified. A Nei's (1972) genetic distance matrix was calculated. The coefficients were utilized to construct a dendrogram using the unweighted pairs group of arithmetic means (UPGMA) algorithm. The dendrogram shows the mango genotypes clustering into two large groups A&B. Both groups were divided into sub-groups. The cluster A consists of released and landraces genotypes while cluster B includes a combination of exotic, indigenous as well as some local cultivars. The results generated with RAPD markers will be helpful in improvement as well as in the application of breeder rights in the country. These will be useful to establish and maintain germplasm of mango and may guide us in designing strategies that maximize the utility of genetic resources.