Breeding method for culturing good-taste and brown stripe-resisting rice

Abstract

The invention relates to a breeding for culturing good-taste and brown stripe-resisting rice and belongs to the field of genetic improvement of rice and application of biological technology. The method comprises the following steps of: selecting Wujing 13 and Guangdong 194 for matched hybridization; performing individual mixed harvest in the F2 and F3 generations, and performing the molecular mark auxiliary selection of dark albumen mutant genes and brown stripe-resisting genes at the F4 and F5 generations to obtain the double-gene homozygote, of which the dark albumen mutant genotype is Wx-mqWx-mq and the brown stripe-resisting genotype is Stv-biStv-bi; and performing the selection of yield and agronomic character at following generations until the new variety of high-yield rice, namely Nanjing 5055, with stabile and consistent agronomic character, good taste and brown stripe resistance is cultured in the F7 generation. The variety of rice has the advantages of high yield, brown stripe resistance, the combination of the softness of glutinous rice and the elasticity of non-glutinous rice, excellent taste and quality and wide application prospect in proper plantations of riverside areas and southern part of Jiangsu Province.

Description

1. Technical field [0001] The invention relates to a breeding method for cultivating rice varieties with good taste and resistance to stripe leaf blight, which belongs to the field of rice genetic improvement and biotechnology application. 2. Background technology [0002] At the end of the 20th century, my country began to attach importance to the development of high-quality rice, and high-quality rice has become the primary goal of national japonica rice breeding (Wang Cailin et al., Journal of Jiangsu Agricultural Science, 2008, 24(2):199-203). But at that time, breeders mainly paid attention to the improvement of appearance quality, but little progress was made in the improvement of eating quality. Taking rice varieties in Jiangsu as an example, from 2001 to 2009, a total of 89 new varieties (combinations) of high-quality japonica rice with national standard level three or higher were cultivated. But the eating quality of most varieties can't meet the needs of consumers...

AI Technical Summary

Problems solved by technology

However, this method will not only be affected by factors such as plant growth and development stage and environmental conditions in the process of offspring selection, but also has many problems in the gene aggregation of multiple excellent traits, which is time-consuming and laborious, and the required breeding period is relatively long. long

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