Application and cultivation method of high-frequency recessive female sterile rice restorer lines

The invention discloses application of high-frequency recessive female sterile rice restorer lines in mixed-sowing or mixed-harvesting type rice seed production. A specific method of the application comprises the steps of taking a high-frequency recessive female sterile rice restorer line as a male parent, taking a hybrid rice male sterile line as a female parent, performing mixed sowing on male/female-parent seeds and performing mixed harvesting on the male/female-parent seeds subjected to hybridization and completing the process of seed production, or the steps of taking the hybrid rice male sterile line with screenable genetic specific characters as the female parent, performing mixed sowing and mixed harvesting and then adopting different separation methods to perform further impurity removal on the seeds subjected to mixed harvesting. The invention also provides a cultivation method which hybridizes a female sterile restorer line FSV1 with a conventional hybrid rice restorer line R, chooses and gets the high-frequency recessive female sterile rice restorer line with stable genetic characters and excellent comprehensive agronomic characters from F1 progenies. The method has the advantages of realizing the full-mechanized operation of producing and processing hybrid rice seeds and greatly improving the efficiency of hybrid rice seed production.