In previous experiments,a natural late-flowering mutant was obtained from a late-season japonica rice line. The mutant exhibits no significant differences in various traits except growth period at the basic vegetative growth stage compared with other wild-type varieties. In Jiaxing City,the heading stage of the late-flowering mutant was averagely delayed by about 20 days compared with other wild-type varieties. According to the results of progeny investigation and statistical analysis,the late-flowering mutant is controlled by a single recessive gene,which can be utilized with breeding technology to obtain sterile lines and multiple lines,thus expanding the germplasm resources for production application,which laid the foundation for subsequent studies.
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