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Genetic diversity was studied in 39 indigenous Brassica juncea accessions along with a check for 10 morphological and 4 biochemical traits under field conditions by cluster and principal component analyses. Each accession was sown in 2 rows of 4 meter length. Row to row and plant to plant spacing was kept at 45 and 10 cm respectively. Cluster analysis divided the total 39 accessions into five and seven major groups during 2007 and 2008, respectively. Data based on first and second five PCs with > 1 contributed 73.30% and 64.45% of the variability amongst accessions, respectively. Scatter plot and tree diagrams demonstrated sufficient diversity among the Brassica juncea accessions for various morphological and biochemical traits and some extent of association between different clusters. The results concluded that morpho -biochemical diversity in the studied material is structured by genotypes and this diversity could be utilized for future cu ltivar breeding and germplasm conservation programs. [ABSTRACT FROM AUTHOR]