Genetic Parameters, Genotype X Environmental Interactions, Correlation and Path Coefficient Analysis of Yield Components In Hexaploid Triticale. (X Triticosecale Wittmack)

The estimates of heritability, genetic parameters, genotype x environment interactions, correlation and path coefficient analysis for yield and its components in twenty diverse genotypes of triticale (X Triticosecale Wittmack) under six diverse environments were worked out. A high degree of variation was observed for all the characters. Most of the genotypes showed high genotypes x environments interactions for all the traits studied. The genetic parameters of variability showed that no character had high magnitude of all four parameters, genetic (GCV) and phenotypic (PCV) coefficients of variability, heritability (H) and genetic advance (GA) under all the environments. Only spike length showed moderate GCV, PCV coupled with high H and GA under all the environments as well as pooled over environments, followed by number of grains per spike and number of spikes per plant in at least four environments. The estimates of correlation coefficients indicated that plant height, number of spikes per plant, grain weight per spike, spike length, 1000 grain weight and harvest index were positively correlated with yield. Number of grains per spike and spike length influenced the grain yield indirectly through grain weight per spike. This suggests that selection for these component charcters can help in improvement of yield in triticale.