Mechanized hybrid rice seed production using inducible female sterility

Abstract

The present invention discloses a female sterile rice breeding method. According to the method, an inducible promoter driven rice female fertile gene expression cassette is transformed into female sterile rice; during female sterile line breeding, the transgene rice uses a corresponding induction agent to induce recombinant fertile gene expression so as to achieve fertile selfing breeding; and during hybrid rice seed production, the transgene rice presents completely female sterility when the induction agent is not applied, such that the transgene rice can be adopted as a male parent so as to be used for seed production, and is subjected to hybridization with a female parent to produce hybrid seeds. According to the present invention, during the harvesting of the seed production process, the male parent is female sterility so as not to bear fruits, such that the male parent and the female parent can be subjected to box type sowing or mixed sowing, and the mixed harvesting can be achieved during the harvesting; and the difficult problem of the female sterile rice breeding is solved, the mechanized hybrid rice seed production is achieved, and especially the mechanized hybrid rice seed production in the mixed sowing and mixed harvesting manner is achieved.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology and discloses a hybrid rice mechanized seed production method using induced female sterility. Background technique [0002] my country's current hybrid rice seed production technology adopts the parental planting in stages, mostly the male parental planting first, and the female parental planting later; the parental parental plants are planted separately in box-type, the female parental lines are multiple rows, and the male parental lines are double-rowed; the parental parental plants are harvested separately , or cut off the male parent after pollination and before maturity. Therefore, hybrid rice seed production is a technology with high labor intensity, complicated procedures and high production costs. With the gradual implementation of urbanization, industrialization, agricultural industrialization and rural land transfer policies, the young and middle-aged labor force left behind in ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods have many defects and cannot fundamentally realize the mechanized seed production of hybrid rice, and there is no large-scale commercial application in production at present.

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