Improvement of tomato (Lycopersicon esculentum L.) for growth in saline soils is a major goal of tomato breeders. The aim of this study was to identify the genetic combining ability and genetics of salinity tolerance in tomato. Plant materials were grown under normal (NG) and salinity stress (SSG) conditions. Results showed that the genetic controlling mechanism of salinity-related traits and fruit weight is complex and that all genetic components of additive, non-additive and maternal are involved. The nature of gene action for fruit weight and salinity-related traits was significantly affected by salinity stress. Dominance and additive gene action were predominant under NG and SSG, respectively. Under NG, the best general combiner parent for fruit weight was P3 (salt-tolerant with moderate fruit yield). Under SSG, P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K⁺/Na⁺, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability. With the high frequency of genes effective in salt tolerance, the P1 parent appeared as the best specific mating partner with other parents under SSG. Simultaneous selection for fruit weight and surrogate traits (cell membrane stability, proline and relative water content) in a population derived from the P1 × P5 (susceptible with high fruit yield) cross could result in a salt-tolerant tomato genotype.

番茄的改良（番茄L.）在盐渍土壤中的生长是番茄育种者的主要目标。这项研究的目的是确定番茄的耐盐性的遗传结合能力和遗传。植物材料在正常（NG）和盐度胁迫（SSG）条件下生长。结果表明，盐度相关性状和果实重的遗传调控机制复杂，涉及累加，非累加和母本的所有遗传成分。盐分胁迫显着影响了针对果实重量和盐分相关性状的基因作用的性质。在NG和SSG下，优势和加性基因作用分别占主导地位。在NG条件下，对果实重量而言，最佳的普通组合育种亲本为P3（耐盐，适中的水果产量）。在SSG下，⁺ / Na ⁺，脂氧合酶活性，脯氨酸，相对水含量，总碳水化合物和细胞膜稳定性。由于对耐盐性有效的基因频率很高，在SSG中，P1亲本与其他亲本似乎是最佳的特异性交配伙伴。同时从P1×P5（易感，高果产量）杂交群体中选择果实重量和替代性状（细胞膜稳定性，脯氨酸和相对水含量）可能会导致番茄的耐盐基因型。