Breeding method of multi-resistance glutinous rice restoring line

Abstract

The invention discloses a breeding method of a multi-resistance glutinous rice restoring line, belonging to the technical field of rice disease-resistance breeding, which comprises the following steps that: a three-line glutinous restoring line is taken as a recurrent parent, and is respectively hybridized with a rice blast resource-resisting parent-A, a rice bacterial leaf blight resource-resisting parent-B, a bacterial leaf steak resource-resisting parent-C and a banded sclerotial blight-D, by a synchronous back-cross aggregation method, the resource-resisting genes of the leading four ricediseases at present can be aggregated to a good three-line glutinous hybridized restoring line of the same genotypic milieu, and the bred multi-resistance glutinous rice restoring line can simultaneously and highly resist the four diseases, and has other agricultural and yield traits which are consistent with those of the original parent, so that the disease resistance of the three-line glutinoushybridized rice can be greatly improved. When the method is used for preparing the glutinous hybridized rice, the disease resistance of the glutinous hybridized rice can be greatly improved.

Description

technical field [0001] The invention specifically relates to a breeding method for a restorer line of broad-resistant glutinous rice, and belongs to the technical field of rice disease-resistant breeding. Background technique [0002] China's rice cultivation area accounts for about 30% of the grain crops, and its total output accounts for more than 40% of the total grain crop output. As China's largest food crop, rice has made great contributions to solving China's food security and improving people's health. In recent years, my country's rice disease outbreaks are frequent, the damage is serious, and the pressure of prevention and control is high. Rice diseases in the eastern coastal, riverside and southern rice areas of my country are relatively serious, and the resistance develops rapidly. The difficulty of chemical control is increasing. Due to the phenomenon of large-scale production reduction due to diseases, agricultural technology extension departments at all levels...

AI Technical Summary

Problems solved by technology

However, at present, most of the disease-resistant varieties in China are monoclonal antibody varieties, that is, they are only resistant to a certain disease, because it is difficult to hybridize and aggregate several disease-resistant genes into one variety, and traditional breeding methods are used to introduce resistance one by one. Genes are time-consuming and labor-intensive, and the effect is poor, so there are few varieties that are resistant to several diseases at the same time

Especially the glutinous hybrid rice that is popularized and applied in production at present, although its yield is very good, its disease resistance is particularly poor, and the yield loss due to disease can reach 8-20%