Pyramiding breeding method for rice blast resisting rice variety with excellent taste

Abstract

The invention discloses a pyramiding breeding method for a rice blast resisting rice variety with the excellent taste. The method comprises the steps that Wu rice 13 and Guandong 194 are selected to be hybridized and matched; then the generation F1 and Wu rice 15 are subjected to multiple crosses, the generation F2 and the generation F3 are subjected to single plant mixed harvesting, marker-assisted selection of dark endosperm mutant genes and rice blast resisting genes is carried out on the product, the obtained dark endosperm mutant gene type is Wx-mqWx-mq, and the obtained rice blast resisting gene type is a three-gene homozygote of Pi-taPi-ta and Pi-bPi-b; subsequent generations are subjected to yield and agronomic trait selection, and rice blast resisting high-yield rice with stable and uniform agronomic traits and the excellent taste is bred on the generation F7. The rice is high in yield and resistant to rice blast and stripe virus diseases, the flexibility of sticky rice and the elasticity of polished round-grained rice are integrated, the taste and quality are very good, the rice is planted in Huaibei and the central region in Jiangsu province under the condition of high and medium fertility, and wide application prospects are achieved.

Description

Technical field [0001] The invention belongs to the field of rice genetic improvement and biotechnology application, and relates to a method for polymerization breeding of rice varieties with excellent taste and resistance to rice blast. Background technique [0002] At the end of the 20th century, my country began to pay attention to the development of high-quality rice, and high-quality became the primary goal of national japonica rice breeding (Wang Cailin et al., Jiangsu Journal of Agricultural Sciences, 2008, 24(2): 199-203). However, at that time, breeders mainly focused on the improvement of appearance quality, and little progress was made in the improvement of eating quality. Taking Jiangsu rice varieties as an example, from 2001 to 2009, 89 new high-quality japonica rice varieties (combinations) above the national standard were cultivated. However, the taste quality of most varieties cannot meet the needs of consumers, and there is a lack of high-quality varieties that ...

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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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