In order to investigate the quantitative traits of mungbean (Vigna radiata (L.) Wilczk) genotypes, a field expriment was carried out in 1999 on the research fields of Agronomy Department Shahid Chamran University, Ahvaz. The expriment was conducted in a randomized complete block design (RCBD) with factorial arrangement of four replications. Plant spacings at 4 levels of 15, 20, 25 and 30 cm within rows (densities of 133333, 100000, 80000 and 66666 plants/ha, respectively) and 3 genotypes of Partow, VC–1973A, and 1-62-32 were used. During the growing period, with 6 times of sampling, the dry weight sof stems, leaves, pods and seeds were determined. Also, in the stage of physiological maturity, grain yield, some vegetative and reproductive traits, biological yield and dry weight of leaves were measured. The results indicated that among the genotypes, 1-62-32 has the highest grain yield (1723.33 kg/ha) and total dry weight, while Partow the lowest grain yield (1438.64 kg/ha). The highest (1713.44 kg / ha) and lowest (1378.58 kg/ha) grain yields were achived in plant spaces of 20 and 30 cm within rows, respectively. Except pod length, number nodes on main stem and days to 50% flowering, other measured traits were affected by the different levels of plant distances on row. With increasing plant density, biological yield and leaf dry weight were increased. Correlation coefficient between traits indicated that rind of pod dry weight and number of pod nodes on main stem (r = 0.74 and r = 0.37 respectively) were most positively and significantly correlated with grain yield.
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