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Anti-head-smut corn auxiliary breeding method

A head smut resistance and assisted breeding technology, which is applied in the fields of plant protection and crop breeding, can solve the problems of inconvenient breeding of head smut-resistant corn, and achieve the effects of reducing breeding scale, accurate identification and cost reduction

Inactive Publication Date: 2012-05-30
JILIN ACAD OF AGRI SCI
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Problems solved by technology

These plants were easily mistaken for disease-resistant plants in the previous conventional identification techniques, which brought great inconvenience to the breeding work of head smut-resistant corn in the later stage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] 1. Preparation of bacteria soil

[0020] Pulverize the mycelium of the smut fungus collected in the autumn of last year, filter out the sundries with a 5.5 mesh sieve, sieve the soil with a 7.0 mesh sieve, mix 200g of bacteria powder per 100kg of fine soil, and prepare 0.2% fungus soil .

[0021] 2. Sowing and seedling management

[0022] At the beginning of April in the northern spring, put the fungus soil into the nutrient pots of the seedling trays, and each nutrient pot is filled with 6 / 7 of the fungus soil. From early to mid-April, when the ambient temperature is stable at 10°C-15°C, the seeds are planted. Sow 1-2 grains in the pot, the sowing depth is 2cm below the fungus soil, water enough to ensure that the soil humidity at the germination stage is 60-70%, the soil temperature is 10-15°C, and the time from sowing to emergence should be 10-15 days , the hyphae have sufficient time and suitable conditions to infect the seeds. After emergence, the ambient temper...

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Abstract

The invention provides an anti-head-smut corn auxiliary breeding method, which mainly adopts a seedling culture disc for seedling inoculation. The infection of head smut germs on plants is promoted through three measures of transplanting young seedlings, watering little water on survival plants and manually inhabiting the growth of the plants, and the disease incidence is improved for assisting the anti-head-smut plant breeding. When the method of the invention is adopted, the seedling culture disc is adopted for seedling culture in the early breeding period, and the culture conditions are manually controlled, so the infection chances of head smut germs on the seed and the seed infection degrees are identical, and at the same time, the outbreak of the disease is promoted through transplanting and breaking the normal growing conditions by drying treatment after the plants are survived, so the disease outbreak rate of the plants is improved by 30 to 50 percent, and the disease resistance breeding cost in the later period is greatly saved.

Description

technical field [0001] The invention relates to the technical fields of crop breeding and plant protection, in particular to an auxiliary breeding method for head smut-resistant corn. Background technique [0002] Maize head smut is a global corn disease. In my country, maize head smut is mainly distributed in spring corn areas such as northeast, north, northwest and southwest mountainous areas. In 2002, maize head smut occurred in Northeast China, with an average incidence rate of 10%-15%, and 70%-80% of serious plots. With the frequent occurrence of this disease, its harm is becoming more and more serious. [0003] Corn head smut is mainly soil-borne and infected at the seedling stage. The pathogen is Sphacelotheca reiliana, which destroys the normal structure of tassels and ears, and the tissue becomes black powdery. Symptoms of the systemic disease. The pathogenic bacteria scatter in the soil as teliospores, mix in the manure or attach to the surface of the seeds to ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00
Inventor 檀国庆邢跃先徐明良夏远峰吴凤新蔡鑫茹赵晶孙志超晁青才卓赵贤荣
Owner JILIN ACAD OF AGRI SCI
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