Evaluation method of tobacco variety on aphid resistance degree

The technology of a variety and tobacco is applied in the field of evaluating the resistance degree of tobacco varieties to aphids, which can solve the problems of inability to divide the degree of resistance of varieties in detail, misjudgment of the degree of resistance of participating varieties, and no evaluation indicators of tobacco varieties, etc. The effect of test time, simple method and easy operation

Inactive Publication Date: 2012-07-18
TOBACCO RES INST CHIN AGRI SCI ACAD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

But these two methods both have certain defects. The former can only roughly judge the resistance of the variety, and there is no clear evaluation index for the degree of resistance of the tobacco variety to aphids, and it is impossible to divide the resistance of the variety in detail; the second method requires When planting susceptible control varieties, due to the uneven distribution of aphids in the field, it is easy to misjudge the resistance of the tested varieties when the population of aphids in the susceptible control varieties is low, and sometimes even the data cannot be obtained.

Method used

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  • Evaluation method of tobacco variety on aphid resistance degree
  • Evaluation method of tobacco variety on aphid resistance degree

Examples

Experimental program
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Embodiment 1

[0035] According to the method provided by the invention, the resistance degree of variety Y-1 to aphids is evaluated, and the steps are as follows:

[0036] 1. Set up the identification field:

[0037] The identification nursery used in the experiment of this embodiment was set at the Jimo Experimental Farm of the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences.

[0038] The experimental farm has a flat terrain, watering conditions, and no chromatographic sources that interfere with aphid activities. The experimental farm has planted tobacco for 5 consecutive years, and the average number of aphids per plant of the susceptible variety Yunyan 85 is about 115 during the peak period of the annual occurrence of aphids.

[0039] 2. Select the test materials:

[0040] The materials used in the experiment were all provided by the Variety Resources Research Group of the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences, including ...

Embodiment 2

[0058] According to the method provided by the invention, the variety Jinshui Bailey No. 1 is evaluated to the degree of resistance to aphids, except that the following steps are different, and all the other are the same as in Example 1:

[0059] 2. Select the test materials:

[0060] The tobacco varieties that participated in the test are shown in Table 1.

[0061] Among them: the variety Jinshui Bailey No. 1 is the tobacco variety to be evaluated, and the variety Yunyan 85 is the susceptible control variety.

[0062] 5. Tobacco variety resistance division:

[0063]Select a plot with the most severe aphid infection in Jinshui Burley No. 1 to count the aphids, the statistical aphids are 400, the calculated average aphids are 40, the statistical aphids of all the test materials are 381523, the calculated average aphids are 198.71 . The aphid resistance index of variety Jinshui Bailey No. 1 was calculated according to the following formula.

[0064] Aphid resistance index of...

Embodiment 3

[0069] According to the method provided by the invention to evaluate the degree of resistance of variety Baimaojianwei-1 to aphids, except that the following steps are different, all the other are the same as Example 1:

[0070] 2. Select the test materials:

[0071] The tobacco varieties that participated in the test are shown in Table 1.

[0072] Among them: the variety Baimaojianwei-1 is the tobacco variety to be evaluated, and the variety Yunyan 85 is the susceptible control variety.

[0073] 5. Tobacco variety resistance division:

[0074] A plot with the most serious aphid infestation of Baimaojianwei-1 was selected to count the number of aphids, the number of aphids was 162, and the average number of aphids was calculated to be 16.2. The statistical aphid amount of all test materials was 381523, and the calculated average aphid amount was 198.71. Calculate the aphid resistance index of variety Baimaojianwei-1 according to the following formula.

[0075] Aphid resist...

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Abstract

The invention belongs to the technical field of crop resistance breeding and especially relates to an evaluation method of tobacco variety on aphid resistance degree, which comprises the following steps: (1) setting a verification nursery; (2) selecting tested materials; (3) performing field trial; (4) performing field investigation; (5) dividing aphid resistance degrees of tobacco variety; and (6) repeatedly verifying. The method provided by the invention has the following beneficial effects: the evaluation method is more objective, simple and liable to operate; the method can simultaneously perform resistance evaluation on a plurality of tobacco varieties to improve the efficiency and save the test time; the method can reduce the error of the evaluation result caused by non-uniform aphid generation; and a uniform aphid resistance index is used in the method to reduce the evaluation result difference of different regions.

Description

technical field [0001] The invention belongs to the technical field of crop resistance breeding, and in particular relates to a method for evaluating the resistance degree of tobacco varieties to aphids. Background technique [0002] The tobacco aphid is a worldwide pest, which occurs every year in various smoking areas in my country, causing serious damage, and is the most important pest on tobacco. In addition to harming tobacco, it also harms various vegetables such as potatoes, cabbage, rape, and cabbage, as well as various forest trees such as peach trees. It hosts more than 300 species and is a typical polyphagous pest. The damage of tobacco aphids includes two aspects: direct damage and indirect damage. Direct damage mainly refers to the damage caused by the adult and nymph thorn smoking plant juice affecting the normal growth and development of tobacco plants and secreting honeydew to pollute tobacco leaves and induce sooty disease; indirect damage mainly refers to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01G7/00
Inventor 任广伟王秀芳王新伟陈丹陈德鑫
Owner TOBACCO RES INST CHIN AGRI SCI ACAD
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