Genetic variation for some chemical and biochemical characteristics in cotton seed oil

摘要

Gossypium arboreum (LD 327, LD 491, LD 694, LD 733, LD 784, LD 805, LD 861 LD 866 and LD 900) and G. hirsutum (F1861, F 1946, F 2009, F 2022, F 2032, F 2036, LH 1556, LH 1961 and LH968) genotypes were evaluated for various chemical and biochemical characteristics.The mean values of American cotton and desi cotton genotypes were statistically at par for seed oil content, crude protein content free fatty acids, iodine number, peroxide value, major fatty acids, palmitic acid, oleic acid, linoleic acid,oil, gossypol and mineral composition (except P). The mean values for seed cotton oil, protein content, free fatty acid content, iodine number, peroxide value, palmitic acid, oleic acid, linoleic acid, phospholipids and gossypol content in G. arboreum ranged from 14.4-18.7 per cent, 20.2-38.6 per cent, 0.30-0.70, 98-112, 5.2-9.0, 24.3-28.9 per cent, 19.1-29.1 per cent, 39.3-52.8 per cent, 0.19-0.90 (g/100 g) and 0.26-1.15 per cent, respectively. Similarly, among G. hirsutum entries tested, the range for these characters was 15.8-20.2 per cent, 25.6-34.8 per cent, 0.43-0.70, 101-113, 6.1-8.7, 24.9-29.5 per cent, 18.8-24.8 per cent, 42.0-52.8 per cent, 0.15-0.63 (g/ 100 g) and 0.17-1.42 per cent, respectively. Mineral composition of oil among G. arboreum genotypes ranged from 19-40 ppm (Zn), 27.3-76.3 ppm (Fe), 2.5-7.5 ppm (Cu), 0.8-1.4 per cent (K), 0.03-0.10 per cent (Na), 0.10-0.17 per cent (Ca) and 1.01-1.05 per cent (P). Similarly, among G. hirsutum genotypes, the mean values of various minerals ranged from 20-30 ppm (Zn), 23.8-60.0 ppm (Fe), 2.5-7.5 ppm (Cu), 1.2-1.3 per cent (K), 0.03-0.09 per cent (Na), 0.10-0.17 per cent (Ca) and 1.0-1.5 per cent (P).