Morpho-physiological studies of 10 genotypes of linseed and the relationship of different characters with seed yield were studied. The genetic variability exists in plant height, branching pattern, leaf production and leaf area which were found significantly correlated with seed yield. Neelum attained the highest dry matter production and seed yield per plant. NAR and RGR were highest in Hira and lowest in R 552. Chlorophyll content in leaves, exhibited considerable variability among the genotypes and was positively correlated with yield. Seed number per plant, number of capsules and harvest index were significantly correlated with seed yield.