HIREMATH, S. M.GOSWAMI, RATNA KINKOR2019-09-202019-09-202001-08-08Th-6015http://krishikosh.egranth.ac.in/handle/1/5810128818Field experiments were conducted at Main Research Station, University of Agricultural Sciences, Dharwad during kharif seasons of 1998 and 1999 to find out the physiological indices for higher productivity in greengram genotypes. During kharif, 1998, 30 genotypes were taken and out of these, 20 genotypes belonging to different yield groups, i.e., high, medium and low yielding were selected for indepth studies during kharif, 1999. The experiments were laid out in randomized block design with three replications on medium black soil. Significant differences were observed for various morpho-physiological, biophysical and biochemical parameters, yield and yield components between the genotypes belonging to different yield groups and within the group. The high yielding genotypes possessed significantly higher number of leaves and primary branches as compared to other genotypes besides having higher values for LAI, CGR, LAD and BMD. These genotypes were also efficient with respect to production and partitioning of total dry matter, particularly in reproductive parts. Significantly higher photosynthetic rate and nitrate reductase activity were also recorded in the genotypes belonging to high yielding group. The important yield components, i.e., number of fruiting clusters, pods, seeds per plant and harvest index were significantly higher in high yielding genotypes. All the above traits recorded significant positive association with seed yield. The important morpho-physiological traits associated with higher productivity in greengram are higher number of leaves, higher TDM, LAI, CGR, LAD, BMD, photosynthetic rate, nitrate reductase activity, higher number of fruiting clusters, pods, seeds per plant and higher harvest index. These traits may be considered important for developing an ideotype concept in greengram. Among the genotypes, M-446 and M-100 were found physiologically efficient and possessed significantly higher values for all the above traits and may be used as a genetic source for improvement of yield potential in greengram.ennullThesis