Assessment of Variability, Heritability and Genetic Advance in 20 Genotypes of Gladiolus (Gladiolus grandiflorus L.)

Abstract

This study was undertaken to find out the estimates of genetic variability, analysis of variance, genetic parameters viz GCV, PCV, heritability and genetic advance among different flower traits between 20 genotypes of gladiolus. The experiment was repeated three times by using RBD (Randomized block design) at crop research centre, Department of Genetics and Plant Breeding, School of Agriculture, ITM University, Gwalior, Madhya Pardesh. Analysis of variance indicated highly significant difference for all the trait among 20 genotypes. The estimate of heritability varied from 92% to 42%. The highest heritability was estimated in broad sense was observed for the character leaf area (92.01%) and lowest for weight of daughter corms (42%). The genetic advance expressed as percent of mean ranged from 7.65% to 55.82%. The highest of genetic advance as percentage of mean was recorded for no. of shoots per corm (55.82%) and lowest for spike initiation (7.65). Environmental coefficient of variance (ECV) ranged from (2.72 to 37.13). the highest ECV was recorded for the character weight of daughter of corms (37.13) and lowest for days to spike initiation (2.72). Key words: Gladiolus, GCV, PCV, Heritability, Genetic Advance as percentage of mean