Variation in morpho-physiological characters of four lentil genotypes of Bangladesh

Abstract

Morpho-physiological growth analysis is very important for the study of growth, development and yield of a crop. In order to study the growth indices and yield performance of lentil field experiments were carried out at two locations (Sub-stations viz. Magura and Ishurdi) of Bangladesh Institute of Nuclear Agriculture (BINA) with two varieties (Binamasur-3 and Binamasur-4) and two mutants (N₄I-404 and E₄I-925) of lentil during rabi season (November–March) 2014. Experiments were laid out in a randomized complete block design (RCBD) with three replications. Growth parameters, physiological data and yield components were evaluated following standard formula and software. At both locations, absolute growth rate (AGR) was higher in mutantline E₄I-925 at 75 DAS (days after sowing). The relative growth rate (RGR) was also found higher in mutant E₄I-925 at 60 DAS fol- lowed by mutant line N₄I-404. Total dry matter (TDM) was higher in mutants than varieties at both the locations at final harvest. For both the locations the highest TDM accumulation was also observed in mutant line E₄I-925. Seed size was higher in mutants and the mutant line E₄I-925 showed the highest seed weight plant⁻¹ at both the locations (2.1 kg ha⁻¹ at Magura; 2.3 kg ha⁻¹ at Ishurdi). Regression analysis confirmed that all the morphological and physiological parameters were positively correlated with yield. On the basis of morpho-physiological characteristics the mutant line E₄I-925 was found superior among four genotypes of lentil.