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以两组耐热和热敏感的大白菜对应亲本（１７７与２７６；１７６与２７９）及其杂交、回交世代（Ｆ１、Ｆ２、Ｂ１、Ｂ２）为材料进行耐热性遗传模型分析和遗传参数估算，得到一致的结果：大白菜的耐热性符合加性－显性－上位性模型，以加性遗传效应为主，兼有上位性效应，显性效应不显著。广义遗传力和狭义遗传力均较高。以耐热和热敏感的５个代表性亲本材料采用Ｇｒｉｆｉｎｇ的双列杂交方法Ⅱ配制杂交组合进行配合力分析，结果表明：加性遗传方差组分很高，而显性遗传方差组分很小，与上述结果一致。同时，耐热亲本材料１７６和１７７均有较高的一般配合力效应值，是耐热性选育的较好亲本材料。
The heat tolerant and heat sensitive Chinese cabbage (177 and 276; 176 and 279) and their hybrid and backcross generations (F1, F2, B1 and B2) were used to study the genetic model of heat tolerance and the genetic parameters The results showed that the heat tolerance of Chinese cabbage accorded with the additive - dominance - epistasis model. The main additive effect was Chinese cabbage with epistasis effect and the dominant effect was not significant. Broad heritability and narrow heritability are high. Five representative parental materials, which were resistant to heat and heat, were analyzed by Grifing’s double-line hybridization method Ⅱ. The analysis of combining ability showed that the additive genetic variance component was high and the dominant genetic variance component was very small , Consistent with the above results. At the same time, heat-resistant parent materials 176 and 177 both had higher general combining ability effect, which was a better parent material for heat-resistant breeding.