Vol. 10, Issue 11 (2021)

Author(s):
S Nanthakumar, D Udhaya Kumar and M Paramasivam

Abstract:
Twenty genotypes of dolichos bean (Dolichos lablab L.) were evaluated for growth and yield parameters under Tamil Nadu condition. The data indicated the significant differences with respect to growth and yield among the various genotypes of dolichos bean. The results of the experiment showed that the mean performance of growth parameters like plant height, number of primary branches per plant, days to 50% flowering, leaf area index at 50% flowering, total biomass at 50% flowering, number of racemes per plant, racemes length, number of flowers per plant and total biomass at last harvest were ranged from 83.89 to 135.28 cm, 3.30 to 6.36, 37.40 to 50.16 days, 46.20 to 58.13, 32.03 to 47.49, 1.30 to 3.52 g, 3.53 to 6.46, 20.92 to 33.15 cm, 16.30 to 33.70 and 4.82 to 8.56g, respectively. The yield parameters viz., days to first harvest, number of pods per plant, pod length, pod width, pod weight, number of seeds per pod, green pod yield per plan and total green pod yield were ranged from 48.73 to 65.23 days, 39.18 to 142.21, 4.56 to 12.45 cm, 1.21 to 2.77 cm, 2.08 to 4.47 g, 2.53 to 4.33, 74.10 to 467.33 g and 2.03 to 12.83 t/ha, respectively. Based on their per se performance, higher yield recorded in both the seasons showed that Ankur Goldy, CO (Gb) 14 and Dhoni as the top three ranking genotypes. Ankur Goldy, which recorded the maximum yield also possessed high mean performance for number of racemes per plant, number of pods per plant and pod weight in both seasons. The genotype Panruti local recorded higher plant height and earlier flowering was observed in CO (Gb) 14. Genotypes having high per se performance under the Tamil Nadu condition all the genoptyes could be selected as parents for hybridization programme except Tindivanam, Cuddalore and Salem local.