Method for assisting rice breeding by using lodging-resistant index

A technology of lodging resistance and rice, which is applied in the field of crops, can solve the problems that rice lodging cannot be fundamentally solved, it is easily affected by human factors, and the difficulty of harvesting is increased, so as to achieve wide adaptability and stress resistance, reduce blindness, The effect of easy operation

Inactive Publication Date: 2019-08-02
HUNAN HYBRID RICE RES CENT
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  • Claims
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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...

Method used

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  • Method for assisting rice breeding by using lodging-resistant index
  • Method for assisting rice breeding by using lodging-resistant index

Examples

Experimental program
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Effect test

Embodiment

[0078] The rice variety Y Liangyou 1152 bred by the above-mentioned method of using the lodging resistance index to evaluate assisted rice breeding has an effective panicle increase of 8.4%, a total grain increase of 11.4%, a solid grain increase of 8.7%, a seed setting rate of 2.5%, and an actual yield increase of 10.7%. The aspect ratio of the physical and chemical indicators of rice quality is 3.2, the polished rice rate is 55.3%, the chalky rate is 28.0%, the chalky degree is 2.5%, the gel consistency is 65.0 mm, and the amylose content is 15.8%. The rice quality is good and the taste is good.

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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...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 王伟平黎妮张超李日生
Owner HUNAN HYBRID RICE RES CENT
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