[目的]研究番茄果实的硬度遗传规律。[方法]选择2个番茄果实硬度显著不同的番茄品系,通过P1、P2、F1、F2、B1和B26个世代联合分析的方法,研究番茄硬度的遗传规律。[结果]番茄硬度的遗传符合1对主基因控制的加性-显性模型,主基因加性、显性及显性度分别为:d=17.37,h=-7.96,h/d=-0.46,加性效应为增效,显性效应为负向不完全显性;主基因效应在B1、B2和F23个世代的遗传率分别为88.59%、45.81%和85.62%。[结论]番茄硬度遗传受1对主效基因控制且具有明显的加性、显性效应。 [Objective] The research aimed to study the genetic rule of hardness of tomato fruit. [Method] Two tomato lines with different fruit firmness were selected. The genetic laws of tomato firmness were studied by the combined analysis of P1, P2, F1, F2, B1 and B generations. [Result] The inheritance of tomato hardness was in accordance with the additive-dominance model controlled by 1 major gene. The additive, dominant and dominant genes of major genes were d = 17.37, h = -7.96, h / d = -0.46 , The additive effect was synergistic, and the dominant effect was negative imperfect dominant. The heritability of main gene effect in B1, B2 and F23 generations were 88.59%, 45.81% and 85.62%, respectively. [Conclusion] The hardness of tomato was controlled by one major gene and had obvious additive and dominance effects.