Method for breeding rice three-nursery breeder seeds by raising rice seedlings on seeding tray

Abstract

The invention discloses a method for breeding rice three-nursery breeder seeds by raising rice seedlings on a seeding tray, is suitable for the planting selection of rice filial generation, and belongs to the technical field of rice breeding. By the method, the problems of residues of rice grains (weed rice seeds or shattered rice in the previous year) of rice seedling beds, assorted seeding and transplanting links, slow seedling recovery after transplanting, large difference of single-plant growth and difficulty in guarantee of the purity of produced breeder seeds are solved. According to the method for producing the rice three-nursery breeder seeds, the production technology of rice ear-row nurseries, ear-line nurseries and breeder seed nurseries and the technology of raising the rice seedlings on the rice plastic seeding tray are combined, the rice seedlings of which the roots have nutritional soil blocks and which are easy to disperse with each other are cultivated by using a plastic seeding tray bowl, and the ear-row (line) nurseries are established by fixed-point single-bowl rice seedling transplantation in fields to perform the comparison of choice of the ear-row (line) nurseries, so that the opportunity of mixing seeds of the rice seedling beds is avoided completely to facilitate the improvement of the selection efficiency, propagation coefficients and purity of the breeder seeds.

Description

technical field [0001] The invention relates to a method for raising and propagating original rice three nurseries in a seedling tray, which is also applicable to the planting selection of rice hybrid offspring, and belongs to the technical field of rice breeding. Background technique [0002] According to the technical operation regulations for the production of original rice seeds (GB / T17316-1998), the production method of the original rice seeds in the three nurseries is to select high-quality single ears, threshing single ears, packing and storing, sowing seedlings or whole ear seedlings, single plant Transplanting, establishment of panicle rows, comparative identification of panicle rows, selection of panicle rows to establish panicle lines, comparative identification of panicle lines, mixing of superior lines, and production of original seeds. Practice has shown that these steps are easy to cause confusion, especially the residue of rice grains in the seedling field (w...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the confusion easily caused by each link of the existing original rice seed production method, especially the rice grain residue in the seedling field (weedy rice seed or rice shattering in the previous year) and the mixing of the sowing and transplanting links, and the transplanting slows down the seedlings. slow, the growth of individual plants varies greatly, and the purity of the original seed produced is difficult to guarantee. A method for breeding original rice seedlings in seedling trays is provided.

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