Scaled accurate identification method of brown plant-hopper resistance of rice in seedling stage

Abstract

The invention discloses a scaled accurate identification method of the brown plant-hopper resistance of rice in a seedling stage, and belongs to the field of rice breeding science. The scaled accurateidentification method of the brown plant-hopper resistance of the rice in the seedling stage comprises the following steps of constructing a large-scale identification room, feeding worms for identification, conducting rice sowing in a large scale, identifying excessive worm inoculation, conducting scientific management after worm inoculation, obtaining and evaluating a resistance identificationresult, and transplanting a resistance material. A scaled accurate identification technical system for identification of the brown plant-hopper resistance of the rice in the seedling stage is built, and the application of the scaled accurate identification technical system on breeding of the brown plant-hopper resistant rice is provided.

Description

technical field [0001] The invention belongs to the field of rice breeding, and in particular relates to a large-scale and precise identification method for rice seedling resistance to brown planthopper. Background technique [0002] Rice is one of the main food crops in my country, and rice plantation faces serious threats from brown planthopper. The rice brown planthopper is an explosive and harmful rice pest. At present, the rice planthopper (mainly brown planthopper) occurs in an area of ​​more than 20 million hectares every year in China, and the annual direct yield loss caused by the rice planthopper damage is more than 2.8 million tons. . For a long time, the control of BPH has mainly relied on the application of chemical insecticides. Extensive use of insecticides often leads to the destruction of the ecological environment, the killing of a large number of natural enemies of the brown planthopper and the improvement of the insecticide resistance, which leads to th...

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Problems solved by technology

[0003] At present, the scale of resistance identification of rice brown planthoppers at home and abroad is generally small, and at the same time, the amount of inoculated insects for resistance identification is small, which cannot meet the needs of resistance breeding for identification of a large number of breeding materials, resulting in poor identification efficiency and accuracy, which in turn leads to low breeding efficiency. The proportion of brown planthopper-resistant rice varieties bred is small

At present, the representative techniques for identification of rice brown planthopper at the seedling stage of rice mainly include "Technical Regulations for Identification of Rice Resistance to Brown Planthopper" issued by Jiangxi Provincial Bureau of Quality and Technical Supervision [Jiangxi Provincial Standards, BD36, (Draft for Comment)] and the document "Rice A comparative study on the identification of rice planthopper resistance" (Chen Yingzhi et al., Anhui Agricultural Sciences, 2010). Its characteristics are that the test materials are sown in plastic or metal pots, covered with nets during identification, and the number of materials for one-time identification is small. The amount of inoculated insects is small, the reliability of the identification results is poor, and it cannot meet the needs of accurate identification of resistance in large-scale rice breeding

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