Hybrid seed producing method for rice

Abstract

The present invention relates to the field of rice hybrid. The present invention breeds rice hybrid by using panicle sterile line 410A as female parent and conventional rice breed as male parent. Experiment shows that the method of the present invention can lower the cost in producing rice hybrid seed obviously, avoid the mixing of maintaining line and sterile line to raise the purity of the rice hybrid seed.

Description

Technical field: [0001] The invention belongs to the field of hybrid rice utilization, and in particular relates to the breeding, propagation and seed production method of a rice loose panicle dwarf long panicle neck height outcross rice male sterile line. Background technique: [0002] In the past 30 years, the production of hybrid rice seeds in China has taken shape, but the problem of high production costs of hybrid rice seeds has not been resolved. Studies have shown that commercial sterile lines still retain many inherent traits that are only suitable for self-fertilization, which is the root cause of the high cost of hybrid rice seed production. Further studies have shown that the main technical defects of hybrid rice seed production are: [0003] 1. The current CMS line of rice is a tight-pane type during the flowering period, and the angle between the primary branch and the main axis of the ear is less than 10° or even close to 0° throughout the flowering period. T...

AI Technical Summary

Problems solved by technology

[0004] 2. At present, the male sterile lines of the main hybrid rice and the male sterile lines under research have poor heading performance, and the number of spikelets that cannot be extracted from the sword leaf sheath in some sterile lines is as high as 50% (male sterile spikelets are wrapped in It is absolutely impossible to outcross fruit in the sword leaf sheath)

Production practice shows that if gibberellin is not sprayed in hybrid rice seed production, and artificial pollination is not used in areas with little wind, the outcross seed setting rate of the current rice male sterile line will be lower than 20%.