Induced mutants show genetic variability in quantitative characters of desi cotton (Gossypium arboreum) and American cotton (Gossypium hirsutum)

摘要

Studies to analyze genetic variability in 41 induced mutants of desi cotton cvs. HD 123, HD 107 and American cotton cv. HS 6 with their respective checks were conducted. Observations were recorded on quantitative character in all mutant genotypes. Theminimum plant height was observed in HD 107-M13 (173.33 cm), HS 6-M (120.86 cm), days to 50 per cent flowering in HD 123-MI (66.87), HS 6-M (75.00), HD 107-M13 (75.06), days to 50 per cent maturity in HD 123-MI (128.80), HS 6-M (145.86), HD 107-M28 (143.06), maximum number of monopodial branches/plant was observed in HS 6-M (6.4), HD 107-M11 (6.66), more number of sympodial branches/plant in HD 107-M6 (30.73), number of bolls/plant in HD 123-MI (45.26), HS 6-M (39.46), HD 107-M21 (54.33), boll weight in HD 123-M2 (2.59g), HS 6-M (3.72g), HD 107-M6 (3.02g) and seed cotton yield/plant in HD 123-MI (112.03 g), HD 107-M21 (146.47g), HS 6-M (110.36g). More seed cotton yield and improvement in all other characters were obtained by the treatment of gamma rays and EMS produced induced mutants