A breeding method for efficiently introducing rice smut resistance in indica rice into japonica rice

Abstract

The invention discloses a breeding method for importing false smut resistance of indica rice into japonica rice. The method includes the following steps: (1) selecting japonica rice varieties / series to be improved and false smut resistant resources of the indica rice; (2) identifying the crude toxin tolerance concentration of the selected japonica rice varieties / series to be improved; (3) cross-breeding to obtain three-way cross coeno-species F1; (4) culturing anther of the three-way cross coeno-species F1 in a culture medium for culturing rows of indica rice; (5) field-planting flower cultured seedlings: planting a single anther cultured seedling to obtain a plurality of japonica rice flower cultured families with the false smut resistance improved, and further planting different flower cultured families in the field and screening to obtain new japonica rice varieties with good agronomic shape and improved false smut resistance, using the japonica rice varieties / series to be improved as a contrast. The breeding method provided by the invention can effectively import the false smut resistance of indica rice into japonica rice, and the false smut resistance breeding can be finished in about three years, therefore, the normal false smut resistance breeding period is greatly shortened; the breeding method has a great breeding application value.

Description

technical field [0001] The invention relates to a japonica rice breeding method, in particular to a breeding method for specifically and efficiently introducing indica rice smut resistance into japonica rice, and belongs to the field of agricultural science and technology. Background technique [0002] Rice false smut (rice false smut), also known as false smut, green smut, corn flower disease, powdery mildew and harvest disease, is one of the important diseases in rice production. Rice false smut occurs most frequently in Asian rice regions, such as China, India, Myanmar and other Southeast Asian countries, and also occurs in Europe, America and Africa. Rice false smut is not serious to the harm loss of rice in history, only as the secondary disease of rice production. However, in recent years, with the global climate change, the large-scale promotion of high-yield and high-quality hybrid rice in my country, and the improvement of rice water and fertilizer levels, rice smu...

AI Technical Summary

Problems solved by technology

However, the transgenic breeding of the rice smut resistance gene and other superior genes for specific elite main cultivars could have accurately achieved the improvement of indica and japonica crosses. , which also requires multi-generation hybrid backcrossing in the field, which cannot solve the problem of indica and japonica crossing. In addition, molecular technology breeding has the problems of high cost and high technical threshold, and it is difficult for ordinary breeders to master

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