重庆番茄晚疫病抗病性鉴定与遗传分析

Resistance Identification and Genetic Analysis for Tomato Late Blight in Chongqing

比较了重庆晚疫病田间自然发病鉴定和室内人工接种鉴定结果的差异,进行了晚疫病抗性材料CLN2037B对晚疫菌生理小种T1的配合力、遗传参数及后代分离遗传规律分析。结果表明:①田间自然发病鉴定与室内人工接种鉴定结果一致,在重庆春季露地进行晚疫病田间自然发病鉴定是可行的;②番茄抗晚疫病材料CLN2037B对生理小种T1的抗性以基因的加性效应为主,遗传力较高,抗性遗传中不存在细胞质基因效应,抗性表现为单基因不完全显性。

The evaluation methods of tomato varieties resistance to late blight were studied in Chongqing. The results showed that field natural infection and indoor artificial inoculation had the same results, and the optimized method to evaluate tomato late blight resistance was field natural infection in spring in Chongqing. The combining ability, genetic parameters and offspring separation genetic regularity of resistant material CLN2037B to tomato late blight race T1 were analyzed. The results showed that the resistance to late blight race T1 of CLN2037B was mainly controlled by additive gene effect with higher heritability, and there was no cytoplasmic gene effect in inheritance of resistance, and resistance was inherited as monogenic trait which was incompletely dominant.