Breeding and seed production method for hybrid rice

Abstract

The invention belongs to the technical field of rice plantation, and discloses a breeding and seed production method for hybrid rice. The method utilizes the measures including performing field layoutof male and female parents, promoting glume opening by a sterile line, collecting pollen of the male parent, spraying, and the like; wherein concentration plantation is separately performed on the male and female parents, seedling raising is performed by utilizing machine transplantation in order to remove impurities; different restoration systems are isolated by distance or flowering periods, and the pollen of the male parent is mechanically collected and preserved at ultralow temperature; when the sterile line shows 30% of ears, "920" is utilized to promote earing, and when the sterile lineshows 50% of the ears, concentration glume opening is promoted by utilizing jasmonates or [alpha]-linolenic acid substances; the pollen of the male parent is mechanically collected and preserved at ultralow temperature, and the pollen is sprayed by a unmanned aerial vehicle; and hybrid seeds are harvested by a harvester. The method contributes to mechanization of planting and transplanting linksin breeding and seed production processes, and avoids generation of mechanical mixing when the hybrid seeds are harvested; the problem that the flowering periods of the male and female parents do notmeet is avoided; and the sterile line promotes the concentration glume opening through combination of spraying the pollen by the unmanned aerial vehicle, and so, the labor intensity is reduced, and the efficiency of breeding and seed production is improved.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a method for breeding and producing hybrid rice seeds. Background technique [0002] At present, the rice planting area in my country is about 3.1×10 8 hm 2 , and the rest have about 1.7×10 8 hm 2 It is hybrid rice. Hybrid seed production has played a leading role in promoting the development of rice cultivation in China and increasing the yield of rice. Hybrid rice seed production is an essential link between hybrid rice breeding and hybrid rice grain production, which provides sufficient seed sources for large-scale planting of rice. However, under the current seed production model, hybrid rice breeding and seed production is a labor-intensive industry. With the aging of my country's population and the inflow of a large number of rural labor forces to cities, the hybrid rice seed production industry has faced many problems that need to be solved urgently...

AI Technical Summary

Problems solved by technology

[0003] In summary, the existing problems in the prior art are: the current hybrid rice seed production method has a reduced seed setting rate, requires more labor input, low seed production yield, and low purity; complicated procedures and improper handling can easily damage pollen cells, Prolonged storage reduces pollen activity

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