Method for breeding high-yield japonica rice species capable of efficiently preventing rice blast

Abstract

The invention discloses a method for breeding high-yield japonica rice species capable of efficiently preventing rice blast. The method comprises the following steps: (1) hybridizing a rice blast preventing parent with a high-yield parent to obtain a hybrid F1 generation, planting the hybrid F1 generation, and harvesting the F2 generation seeds; (2) sowing the F2 generation seeds in the planting area in a proper time, and selecting the single plants to obtain F3 generation plants; (3) mixing the selected F3 generation plants, threshing, sowing in a proper time, planting single plants, in the booting stage, using the rice blast mixed bacterium liquid in the area which is suitable for promotion of the species to carry out inoculation, and choosing the single plants to obtain the F4 generation plants; (4) choosing segregation generation more than F4 generation, choosing the plants, and obtaining the seeds of target species. According to the method, a rice blast inoculation technology and a high-yield species small area selecting technology are organically combined; the rice blast resisting gene and high-yield gene are effectively combined; the yield level and the resistance level are both enhanced, the vitality of the novel species is improved, and the rice blast resistant level of the novel species is effectively enhanced at the same time.

Description

Technical field [0001] The invention relates to a method for selection and breeding of high-yield japonica rice varieties with high efficiency and resistance to rice blast, belonging to the technical field of plant variety selection and breeding. Background technique [0002] At present, rice is the largest food crop in my country. Ensuring the safe production of rice is the foundation for increasing grain production and farmers' income, and it also has a huge role in promoting the development of the national economy. With the global warming and the increase of extreme climatic uncertainties in the rice production process, rice production is facing new challenges, such as: high temperature during the flowering period causes an increase in the number of empty grains, in the middle and late stages, long-term rain, resulting in the occurrence of ear neck blast Rice, insect pests, etc., will seriously affect the safety of rice production. Among them, rice blast is the most affected, ...

AI Technical Summary

Problems solved by technology

With the warming of the global climate and the increase of extreme climate uncertainties in the rice production process, rice production is facing new challenges, such as: high temperature during the flowering period increases the number of empty grains, and long-term rainy periods in the middle and late stages cause the occurrence of panicle blast , insect pests, etc., will seriously affect the safe production of rice. Among them, the rice blast is the most serious. There are more than 100 kinds of rice, and there is vertical resistance. Once it occurs, the infection speed is very fast, and the effect of chemical control is not good. Especially in 2014, rice febrile disease occurred in a large area from the northeast of China to the Yangtze River Basin. More than 2 million mu in the region have no harvest, and more than 5 million mu in the Yangtze River Basin have suffered severe production losses, causing huge output losses to our country