Method for assisting rice breeding by using lodging-resistant index

Abstract

The invention belongs to the technical field of crop breeding, and discloses a method for assisting rice breeding by using a lodging-resistant index. The method comprises the following steps of performing rice lodging resistance primary identification, lodging-resistant resource screening, lodging-resistant material creation, lodging-resistant variety culture and secondary comparison test for selecting a good line. Through existing parent hybridization group matching, field selection and multi-generation purification, a stable line is obtained. Through the hybridization and multiple crossing with an existing backbone sterile line (female parent) and restorer line (male parent), a cross generation plant line is subjected to lodging-resistant material selection; large-spike lodging-resistantfertilizer-resistant rice parent materials R1152, R1116, R1283 and the like are cultured; the group matched cross combination Y Liangyou 1152, Guangliangyou 1116, Y Liangyou 844 and the like show theproperties of great spikes, many grains, high fertilizer-resistant and lodging-resistant capability and high yield level. The method uses the quantitative evaluation of the lodging-resistant index; the lodging-resistant capability of different rice new lines can be accurately and objectively judged; the good line can be better screened in an assistance way.

Description

technical field [0001] The invention belongs to the technical field of crops, and in particular relates to a method for assisting rice breeding by using lodging resistance index. Background technique [0002] Currently, the closest prior art: [0003] Large-scale direct seeding of rice can save a lot of labor and alleviate the contradiction of labor seasonal tension. It is of great significance to realize light, professional and large-scale rice production, and has broad prospects for promotion. However, compared with transplanted rice, direct-seeding rice has three major problems: hard seedlings, heavy weed damage, and easy lodging. The existing technology generally strengthens field management and cannot fundamentally solve the problem of rice lodging. [0004] In the rice areas in the middle and lower reaches of the Yangtze River, the cultivation area of ​​light and simplified direct seeding of rice is increasing, the root system of rice is shallow, and the lodging resis...

AI Technical Summary

Problems solved by technology

[0006] (1) The prior art generally strengthens field management and cannot fundamentally solve the problem of rice lodging

[0007] (2) The traditional judgment of rice lodging resistance is mainly based on field observation with the naked eye. There is no quantitative standard, and it can only be roughly divided into levels such as tilt, slope, fall, and volts. This kind of judgment method is objectively affected by environmental factors such as typhoons. Subjectively susceptible to human factors

Mature rice lodging makes harvesting more difficult, increasing yield but not increasing income

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