A method for directional and rapid selection of glutinous rice restorer lines

Abstract

The application of the invention discloses a method for rapidly breeding a glutinous rice restoring line in a directed way. The method adopts backcrossing limited generations, eliminating a defectiveplant in the breeding process, and choosing the target character while backcrossing, so that the breeding scale is reduced and narrowed, the labor intensity is reduced, the choosing efficiency is improved, the applicability of the chosen restoring line is guaranteed; in addition, the parent is reasonable to choose, the obtained glutinous rice restoring line and the glutinous rice sterile line arehybridized, the combining capability is high, and the hybrid variety having excellent comprehensive properties, a huge yield potential and production and application values is prepared.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a method for directional and rapid selection of restorer lines of glutinous rice. Background technique [0002] Hybrid glutinous rice is an important variety type used in glutinous rice production. It has the advantages of high production efficiency, strong lodging resistance, and good economic benefits, and is welcomed by the majority of planting entities. However, the supply speed of hybrid glutinous rice varieties is difficult to meet the market's demand for multiple types of glutinous rice varieties. It is an urgent task to speed up the research on the selection and breeding of hybrid glutinous rice varieties that meet the production needs. [0003] The selection of glutinous rice restorer lines is one of the key technologies for combining hybrid glutinous rice combinations. At present, the breeding of glutinous rice restorer lines in production mainly adopts the hybri...

AI Technical Summary

Problems solved by technology

This method is mainly based on systematic breeding. In the early stage, the lines with obvious defects, such as lines with poor lodging resistance and disease resistance, are mainly eliminated, and the main target traits such as waxy genes and restorer genes are not selected.

This has caused this method to have the following disadvantages: 1, the workload is large, and there are at least hundreds of hybrid offspring; 2, the selection efficiency is low, according to Mendel's genetic law, glutinous rice strains only account for 1 / 4 of all strains, from which Select glutinous rice restorer lines, the ratio is lower; 3. The production applicability cannot be guaranteed. The purpose of crossing the ordinary rice restorer lines with the glutinous rice varieties is to obtain the glutinous rice restorer lines with the excellent production characteristics of the ordinary rice restorer lines.

Due to the method of systematic breeding, the genes of the normal rice restorer line in the glutinous rice restorer line selected by the hybrid offspring only accounted for about 50%, which led to a large change in agronomic traits from the common rice restorer line. It is possible to select a glutinous rice restorer line suitable for production