Investigation of cotton mutant lines with nuclear technology response in saline water irrigation and potassium spray

This study was conducted to evaluate the effect of saline irrigation on yield and yield components of cotton genotypes. Experiments were carried out at Rudasht saline Research Station in Isfahan during 2013, 2014 and 2015. In the first year, two cotton mutant genotypes and two commercial cultivars as control were selected for the second and third years. The second year experiment was split factorial based on randomized complete block design with four replications. In this experiment, the main plots consisted of irrigation with 4 (control), 8 and 12 dS / m saline water and subplots including factorial combining of three genotypes (mutant genotype 1673, LM 1303 and Shayan) with spraying three levels of potassium sulfate (2, 4 and 6 kg / 1000 liters of water per hectare and water). The results showed that salinity of irrigated water reduced linter percentage, yield and harvest index. Among the cultivars, the highest linter percentage and its yield were observed in the LM 1303 genotype. Spraying with potassium sulfate had a positive effect on these traits and increased cotton genotypes yield under salinity conditions. The results of this study showed that in saline conditions, soluble potassium sulfate was used to reduce the effects of salinity and increase the yield of cotton genotypes. Also, the results of this study showed that the LM 1303 mutant genotype during the two years of experiment had a higher yield compared to other genotypes, and this genotype could be recommended for planting in saline areas