ABSTRACT

Salt-affected areas are increasing at a rapid rate that are decreasing agricultural productivity. For this purpose, 6 salt-tolerant and 3 salt-sensitive parents were crossed in a Line × Tester fashion and were sown under control, 10 and 15 dSm⁻¹ salt stress for 2 years. Data were recorded for various biochemical, agronomic, and fiber quality traits like H₂O₂ (hydrogen peroxide), SOD (superoxide dismutase), POD (peroxidase), CAT (catalase), TSP (total soluble proteins), K+ (potassium), Na⁺ (sodium), potassium to sodium ratio (K+/Na+), plant height, number of bolls, boll weight, seed cotton yield, GOT% (ginning out turn) fiber fineness, fiber length, and fiber strength. Mean values of plant height, number of bolls, boll weight, seed cotton yield, K⁺, K⁺/Na⁺, fiber fineness, fiber length, fiber strength, antioxidants’ activities showed significant reductions under salt stress. Contrarily, Na⁺, GOT%, H₂O₂, TSP and POD activity increased under salt stress, and this effect was more profound under 15 dSm⁻¹. KEHKSHAN × FH-114 remained outstanding in both years and was found salt-tolerant genotype which can be effectively used in future breeding program.

摘要

受盐分影响的地区正在迅速增加，这正在降低农业生产力。为此，将6个耐盐亲本和3个盐敏感亲本以Line×Tester方式杂交，并在10和15 dSm ^-1盐胁迫下播种2年。记录了各种生化、农艺和纤维质量性状的数据，例如 H ₂ O ₂（过氧化氢）、SOD（超氧化物歧化酶）、POD（过氧化物酶）、CAT（过氧化氢酶）、TSP（总可溶性蛋白质）、K+（钾） , 钠⁺（钠）、钾钠比（K+/Na+）、株高、铃数、铃重、籽棉产量、GOT%（轧花转）纤维细度、纤维长度和纤维强度。盐胁迫下株高、铃数、铃重、籽棉产量、K ⁺、K ⁺ /Na ⁺、纤维细度、纤维长度、纤维强度、抗氧化剂活性的平均值显着降低。相反，盐胁迫下Na ⁺、GOT%、H ₂ O ₂、TSP和POD活性增加，并且这种影响在15 dSm ^{-1下更为显着}. KEHKSHAN × FH-114在这两年都表现出色，发现了耐盐基因型，可有效用于未来的育种计划。