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以红花烟草（Ｎｉｃｏｔｉａｎａｔｏｂａｃｃｕｍ）杂交种（亲本为Ｋ３２６×Ｇ１４０）后代Ｆ５和Ｆ６系谱为材料，分别于１９９３年和１９９４年进行田间试验。对Ｆ５世代６８个家系的第７周株高、开花时株高资料和Ｆ６世代１２８个家系的最后株高资料进行三级、四级巢式结构的方差分析，得到足够的参数估计方程，在二级统计量水平上迭代估计各性状的主要遗传参数并计算狭义遗传力。３个性状基本符合加性显性模型，第７周株高、开花时株高、最后株高三个性状单株狭义遗传力分别为０．２７８，０．４１５和０．５５３
The F5 and F6 pedigree of Nicotianatobaccum hybrid (K326 × G140) were used as materials in the field trials in 1993 and 1994 respectively. In the F5 generation 68 families of the 7th week height, flowering height data and F6 generation of 128 pedigrees of the final plant height data were three-level, four-level nested structure analysis of variance, sufficient parameters to estimate the equation, in The level of secondary statistics iteratively estimates the major genetic parameters of each trait and computes the narrow heritability. The three traits basically conformed to the additive dominant model. The plant height at the 7th week, plant height at flowering, the narrow trait heritabilities of the three traits were 0.278,0.415 and 0.553