Study of Cotton Fibre Traits Inheritance under Different Temperature Regimes

Genetic behaviour of fibre quality parameters under heat-stressed conditions clearly reflected the significant effect of heat stress on the phenotypic expression of fibre quality parameters. Results from the field experiments demonstrated that fibre quality was better among the upland cotton cultivars under non-stressed (June) regime. Fibre length, strength, uniformity and fineness were substantially high under June regime when compared with that under April (heat stressed) regime. The prevalence of significant genotype x temperature regime interaction for fibre length, fineness and strength provided another evidence for the influence of temperature regimes on the expression of fibre traits. A significant effect of heat stress on the phenotypic expression of fibre quality parameters was observed.