Salt tolerance is a physiologically and genetically complex trait controlled by multiple genes. To analyze the genetic basis of salt tolerance we evaluated 18 F₁ along with their nine parents under three salt stress levels i.e. control, 10 dS m⁻¹ and 15 dS m⁻¹ in the summer of 2017 and 2018. Data were recorded for the number of bolls, seed cotton yield, boll weight, Na⁺, K⁺, K⁺/Na⁺ ratio, H₂O₂, SOD, POD, CAT and TSP. Line × tester analysis indicated that the contribution of lines was greater than testers. Except for Na⁺, most of the traits were controlled by non‐additive genes. With the rise of salt stress, SCA variances increased and were higher than GCA variances for most of the traits indicating the traits were controlled by a few largely dominant genes. KEHKSHAN, FH‐118 and FH‐114 were found good general combiner whereas the cross KEHKSHAN × FH‐114 was a good specific combiner and also indicated significant better parent heterosis for most traits during two years under salt stress and can be utilized in a breeding programme for salt tolerance.

中文翻译：

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盐胁迫下陆地棉功能性状组合能力和杂种潜力的两年研究

耐盐性是由多个基因控制的生理和遗传上复杂的性状。为了分析耐盐性的遗传基础，我们在三种盐胁迫水平下（即对照，10 dS m ^-1和15 dS m ^-1）于2017年夏季和2018年评估了18 F ₁及其9个亲本。棉铃数，籽棉产量，棉铃重，Na ⁺，K ⁺，K ⁺ / Na ⁺比例，H ₂ O ₂，SOD，POD，CAT和TSP。Line×测试人员分析表明，线路的贡献大于测试人员。Na ⁺除外，大多数性状由非加性基因控制。随着盐胁迫的升高，大多数性状的SCA变异均增加且高于GCA变异，这表明该性状受少数几个主要优势基因控制。KEHKSHAN，FH‐118和FH‐114被认为是良好的普通组合物，而KEHKSHAN×FH‐114杂交是良好的特异性组合物，并且在盐胁迫下的两年内，大多数性状也表现出明显更好的亲本杂种优势，可用于育种耐盐程序。