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Field Screening Method for Resistance/Resistance to Rice Borer, Rice Borer and Rice Roller Borer

A technology of rice leaf roller and rice stem borer, which is applied in the field of breeding, can solve the problems of lack of uniformity in resistance identification standards and indicators, and achieve the effects of strong practicability, high throughput, and strong operability

Active Publication Date: 2020-09-01
RICE & SORGHUM INST SICHUAN ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

The resistance identification standards and indicators proposed by the predecessors lack uniformity, and the insect resistance evaluation of the tested materials is based on the insect resistance performance of the plant at a certain growth period or a single insect species

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Screening and identification nursery is located in Yingzhou Town, Lingshui Li Autonomous County, Hainan Province, with an annual average temperature of 25°C, no severe cold in winter, and sufficient rainfall. There are more generations of Chilo borer in the south of China than in the north, and there are 6 generations in Hainan Island a year, so Hainan Island is the preferred area for the screening and identification of Chilo borer. The rice leaf roller is widely distributed in various rice areas.

[0044] Rice F containing endogenous insect resistance gene 2 Populations were sown around 3 / 25 (middle rice type), or around 4 / 10 (early rice type).

[0045] each F 2 Group planting more than 1000 (100 rows, 10 litters per row), single planting. After heading, select insect-resistant individual plants. Standards: ① Select individual plants that are non-edge rows and have no symptoms of damage throughout the growth period. ② Symptoms of damage: a. The time of occurrence o...

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Abstract

The invention relates to a method for screening a material resistant to chilo suppressalis, scirpophaga incertulas and Cnaphalocrocis medinalis in field. The method comprises that S1) seeding time ofa paddy rice material to be screened is determined; S2) adjacent field parcels in a garden is processed, screened and identified; S3) the plantation scale of the F2 generation and a selection standardof single stem borer resistant plant are determined; S4) plants of high resistance are selected from a strain of higher resistance in an intermediate generation; and S5) the field resistance of the resistant strain in the final decision generation is identified, analyzed and evaluated. The method has the advantages that the seeding time is arranged appropriately, so that the serious stem borer generation period is coupled to the period in which the paddy rice plants are sensitive to the stem borers, the stem borer resistant paddy rice strain is selected selectively, the stem borer resistanceis identified accurately, and a stem borer resistant parent is provided for cultivation of chilo suppressalis, scirpophaga incertulas and Cnaphalocrocis medinalis resistant hybrid rice.

Description

technical field [0001] The invention relates to breeding technology, in particular to a field screening method for materials resistant to rice stem borer, rice stem borer and rice leaf roller. Background technique [0002] Chilo suppressalis (Walker), three stem borers (Scirpophagaincertulas (Walk)) and rice leaf roller (Cnaphalocrocis medinalis (Guenée)) belonging to the order Lepidoptera are the three major insect pests that affect the high and stable yield of rice. From the beginning of the heading stage to the heading stage, the three stem borers could cause damage to rice. Cultivating and using insect-resistant varieties is the most economical, safe and effective technical means to control the stem borer, stem borer and rice leaf roller. [0003] Insect resistance identification is an important link in insect resistance breeding, and resistance selection criteria are the fundamental basis for accurate identification and evaluation of resistant materials. The resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/22A01G7/00
CPCA01G7/00A01G22/22
Inventor 谢戎李永洪王中华
Owner RICE & SORGHUM INST SICHUAN ACAD OF AGRI SCI
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