5-1-7-Islam et al


M. F. Islam, J. Rahman*, M.S. Islam and A. Akbar
*Correspondence author: jamilsau@gmail.com

Twenty-nine genotypes of tomato (Lycopersicon esculentum Mill.) were evaluated at Sher-e-Bangla Agricultural University, Dhaka, during October 2011 to February 2012 following randomized complete block design to assess the magnitude of genetic divergence in genotypes using Mahalanobis’s D2 and Rao’s canonical variate analysis for thirteen fruit related parameters. The twenty-nine inbreds formed five distinct clusters. The intra-cluster distance was low indicating that the genotypes within the same clusters were closely related. The highest inter-cluster distance was observed between clusters I and III and the lowest between clusters I and II. The clusters I and V each contained the highest number of genotypes. Cluster V showed the highest mean values for fruit yield per plant, fruit weight, fruit diameter and locule number, while cluster II showed the highest mean values for fruits per plant and branches per plant. Cluster I had the lowest mean values for first flowering and fruit setting traits. Days to first flowering, fruit diameter, locule number and fruits per plants showed maximum contribution towards total divergence among different characters studied. Based on the medium to high inter-cluster distance, per se performances and desirable traits, we selected fourteen tomato genotypes viz. BARI Tomato-4, BARI Tomato-11, BD-7260, BARI Tomato-3, BD-7301 and BD-7761 for future hybridization program. Crossing between these genotypes would have higher chance to obtain heterosis with high performing crosses of desirable characters.

Keywords: Genetic diversity, germplasm, fruits, and tomato.

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