A kind of breeding method of new rice variety

Abstract

A simplified and high-efficiency breeding method for new rice varieties. The separated generations of rice seeds are sequentially subjected to chemical seed soaking, germination treatment, sowing and seedling raising, seedling pulling, single seedling transplanting, screening of excellent single plants, and threshing. The rice seeds obtained after threshing are re- The above-mentioned breeding process is repeated generation by generation until a new variety with stable traits is bred. After the seedlings are pulled out, strong seedlings with tillers are selected for single seedling transplantation. The beneficial effect of the present invention is that: the screening window for the relevant traits of rice yield components and stress resistance is moved forward, and the passive screening in the later stage is changed to the active screening in the early stage, which significantly improves the breeding effect; the planting scale of the seed selection nursery is greatly reduced, and a large amount of energy is saved. Manpower, material and financial resources, reducing the cost of breeding, can obtain a significant effect of getting twice the result with half the effort. It is not only suitable for the breeding of new conventional rice varieties, but also suitable for the breeding of male and female parents of hybrid rice, so as to comprehensively speed up the process of rice breeding.

Description

Technical field [0001] The present invention is a selection technology in new crop selection and breeding technology, and it involves a selection method for streamlined and high -efficiency rice varieties. Background technique [0002] Rice is one of the most important food crops in my country. More than 65%of my country has the population of rice as the staple food and is the largest rice production and consumer country in the world.The annual planting area of rice was 30 million hectares, accounting for 20%of the world; the output was 185 million tons, accounting for nearly 1 / 3 of the world; the unit area output was 6.35 tons / hectare, 65%higher than the global average output of 3.85 tons / hectare.The acquisition of this achievement depends on the support of rice breeding technology.In recent years, the research of rice breeding in my country has made rapid progress. The research on hybrid rice breeding has continued to maintain the world's leading level. The research of conventi...

AI Technical Summary

Problems solved by technology

Therefore, this screening method, which is like looking for a needle in a haystack, is very passive and lagging. Not only is the efficiency of breeding new varieties low, but the whole process from planting to harvesting is accompanied by a lot of waste of labor, land resources and production materials. Ultimately get twice the result with half the effort

[0005]Aiming at the above-mentioned problems that have existed in the conventional rice breeding industry for a long time, after industry investigation and related data retrieval, it is found that there is no effective solution or improvement strategy at present