番茄果实硬度遗传机制的研究(英文)

Study on Inheritance Mechanism of Tomato Fruit Firmness

[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] This study aimed to investigate the inheritance mechanism of tomato fruit firmness.[Method] Two tomato cultivars significantly different in fruit firmness were selected for investigation of the inheritance mechanism of tomato fruit firmness using combination analysis of six generations （P1,P2,F1,F2,B1 and B2）.[Result] The results indicated that the heredity of tomato fruit firmness was consistent with the additive-dominant model controlled by one pair of major genes; the additive effect （d）,dominant effect （h） and degree of dominance （h/d） of major genes were 17.37,-7.96 and-0.46,respectively,showing positive additive effect and incompletely dominant-negative effect; the hereditability of major gene effect in B1,B2 and F2 generation was 88.59％,45.81％ and 85.62％,respectively.[Conclusion] The heredity of fruit firmness was controlled by one pair of major gene,showing significant additive effect and dominant effect.