Vol. 12, Issue 1 (2023)

Author(s):
Vinutha DB, Sateesh R Patil, Seetharamu GK, Satish D, Pavan Kumar P, Mahesh YS, Waseem MA and Thilak JC

Abstract:
Thirty gladiolus (Gladiolus grandiflora L.) genotypes were evaluated for 22 characters to estimate genetic variability, genetic parameters and character association. The magnitude of phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV). The highest GCV and PCV was observed for number of spikes per plant (38.06), numbers of corm per clump (33.48), days for first to last floret opening (29.88) and vase life of flower (29.63). Among the traits studied the highest heritability estimates was recorded in spike length (99.95%), plant height (99.86%) and days for first floret opening (99.77%). Genetic advance as percent mean was the highest for number of spikes per plant (75.23) and number of corms per clump (61.64). High heritability combined with high genetic advance was noticed for number of spikes per plant and number of corms per clump indicating there was additive gene action in expression of these traits and thereby further improvement could be made by selection. Genotypic correlation coefficients were higher than phenotypic correlation coefficients indicating the association between the characters is mainly due to the genotype. Maximum positive direct effect on number of spikes per plant was exerted by days for first floret opening. Hence, number of spikes per plant and days for first floret opening may be considered for further improvement.