Abstract:

To provide the theoretical basis for the mutant lines’ application, the variation of the main characters of SP3 mutants of three wide-used maize inbred lines were compared with CK, and the mutagenic effects were analyzed. The variation range, coefficient of variation and average of characters in the SP3 mutants were compared with CK, meanwhile, t-test was taken for the average of traits. Many traits of the lines of mutation SP3 were produced significant variation. And it provided the basis for selecting different types of germplasm materials. In this study, the variance of plant characters tended to shorter plants and smaller leaf area for three maize inbred lines. It was good for selecting a dwarf and thin leaf mutations. There was little significance for selection because of small ear traits variation. However, the variances of growth period and tassel traits had different comparatively. Different materials and their different characters had different mutated effects treating by space flight, so it is important to select mutated materials in the breeding.