Genetic Analysis of Plant Height using Mixed Major Gene plus Polygenes Inheritance Model in Culture Spawn of Nicotiana Tabacum L.

The mixed major-gene plus polygene inheritance model was used to analyze the inheritance of plant height in culture spawn of Nicotiana tabacum L. cross between flue-cured tobacco and burley tobacco, oriental tobacco, sun-cured tobacco. The results showed that the plant height was controlled by the same model (E1), and there were additive gene effect and dominant gene effect in the three cross combinations; the heritability of major genes for G-28×Qiancengta and G-28×Basma, were 71.60% and 88.55% respectively. The higher heritability will provide the theoretical basis for choosing the plant height at earlier generation.