A kind of seed production method of hybrid rice

Abstract

The invention discloses a hybrid rice seed product method. The hybrid rice seed product method comprises the following steps: (1) selecting high-quality two-line photo-thermo sensitive genic sterile male line Guangxuan S as a female parent, and selecting an indica-japonica hybridized wide compatibility restorer line Guanghui 499 bred through self-parent convergent cross as a male parent; (2) raising rice seedlings, namely, carrying out two-stage rice seedling raising on the male parent, wherein seedling age in a first stage is controlled to be within 7 days, and 13cm*13cm single plant deposit transplanting is adopted in the first stage and a second stage, and 13cm*10cm double plant deposit transplanting is adopted in a three stage; and the female parent is in wetness-raised seedling, a medicament is adopted for soaking seeds, sparse seeding and uniform seeding are adopted, short seedlings are cultivated, seedling transplanting age of the female parent is 22 days, and the female parent is transplanted before 6.0 leaves grow; (3) transplanting according to the specifications that bed width of a seed field is 2.0-2.1m and the male parent and the female parent are transplanted in a row ratio of 1 to (12-14) in each bed; (4) carrying out nutrient and water management; (5) predicting and adjusting a flowering period, wherein a flower meeting standard is that the female parent and the male parent are eared at the same time or the female parent is eared 1-2 days earlier than the male parent, and meeting of the female parent and the male parent in a full blooming period is guaranteed to the utmost extent; and (6) preventing impurities.

Description

Technical field: [0001] The invention relates to a hybrid rice seed production method, which belongs to the field of agricultural technology. Background technique: [0002] Hybrid rice is produced by crossing different rice species, relying on the female parent and its two objects, namely "three lines" (sterile line, maintainer line and restorer line). In terms of production, a breeding field and a production field are planted. The breeding field is planted with a sterile line and a maintainer line. When they both bloom, the maintainer line transmits pollen to the sterile line with the help of wind, insects, water, birds and other media. , the sterile line gets normal pollen fruiting, and the offspring produced are still the sterile line, so as to achieve the purpose of breeding the sterile line. We can keep a part of the propagated CMS seeds to continue to reproduce in the coming year, and the other part will be produced with the restorer line. When both the CMS and the re...

AI Technical Summary

Problems solved by technology

Conventional rice has better quality but low yield, so both high yield and high quality are unresolved problems in conventional rice and existing hybrid rice breeding