Breeding method for importing false smut resistance of indica rice into japonica rice

A technology for rice false smut and japonica rice, applied in the field of agricultural science, can solve the problems of indica-japonica cross, difficult to master, and high technical threshold, and achieves the effects of reducing screening workload, shortening breeding cycle, and low operating threshold.

Active Publication Date: 2015-04-29
云南楚源种业有限责任公司
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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 hybr

Method used

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  • Breeding method for importing false smut resistance of indica rice into japonica rice
  • Breeding method for importing false smut resistance of indica rice into japonica rice

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Embodiment

[0049] (1) Screening S0735 and Shanyou 45 as japonica rice breeding parents and indica rice smut resistance sources respectively:

[0050]Many years of breeding practice have found that the main breeding line S0735 has the characteristics of high yield and excellent rice quality. At the same time, the average plant height of S0735 is only 98.2cm in two years, and the whole growth period is only 153 days. It is susceptible to rice false smut. The S0735 anthers were taken seasonally and inoculated on the indica rice medium for induction culture. The experiment found that the callus induction rate of S0735 was as high as 53% (the anther culture operation steps are the same as before), which is very suitable for the requirements of the japonica rice breeding parents of this technical route. Shanyou 45 is an early indica hybrid rice selected from Zhenshan 97A and the early indica restorer line 45-10 by the Agricultural Science Institute of Xianning City, Hubei Province. It has high ...

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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...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H4/00A01G16/00A01G22/22
Inventor 不公告发明人
Owner 云南楚源种业有限责任公司
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