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Method for breeding intermediate material with rice blast resistance

A rice blast and rice blast resistance technology, applied in the field of rice genetic breeding design, can solve the problems of low labor intensity, slow development of rice blast resistance bacteria breeding, etc., and achieve the effect of improving screening efficiency

Inactive Publication Date: 2019-11-12
JIANGSU COASTAL AREA AGRI SCI RES INST
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Problems solved by technology

[0003] Purpose of the invention: In order to overcome the problem that the existing technology cannot meet the needs of grass-roots breeding units to screen a large number of rice blast-resistant materials, which leads to the slow development of rice blast-resistant fungus breeding; Method for blast screening intermediate material for rice blast resistance breeding with high efficiency

Method used

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Embodiment Construction

[0021] Below in conjunction with embodiment, the present invention is described in further detail:

[0022] A method for selecting an intermediate material for rice blast resistance breeding, comprising the following steps:

[0023] (1) Collecting diseased plants of rice blast: collect diseased straws with bacteria in the whole province, and store them in the warehouse to dry in the shade, so that the bacteria can safely overwinter on the diseased straws, and germinate spores for infection in the second year;

[0024] (2) Select the plots that can represent the incidence of rice in the target area for the planting of the test materials, and form an identification network from the diseased nurseries in different target areas, and there are gradient differences in the incidence of rice blast in different identification networks;

[0025] (3) Sowing at the right time: in the first ten days of June, the same group of test materials were planted in each experimental disease nursery...

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Abstract

The invention relates to a method for breeding an intermediate material with rice blast resistance. The method belongs to the technical field of rice genetic breeding design, and is characterized by including the following steps: (1) screening a plurality of different physiological races of rice blast in the same region; and (2) preforming gradient selection of rice blast resistance on the same material in different regions. Under the selection pressure of multiple physiological races of Magnaporthe grisea, the breeding intermediate material can obtain broad-spectrum high-resistance breeding material. The tested materials are planted in different regions, and local meteorological data are observed and recorded to screen out rice breeding material that can adapt to different disease pressures. Rice blast resistance screening is carried out by utilizing physiological races of rice blast in different regions and disease pressures in different regions, the efficiency of breeding intermediate material with rice blast resistance by breeders is improved, and the method has the advantages of rapidness, simplicity and economy.

Description

technical field [0001] The invention relates to a method for selecting an intermediate material for rice blast resistance breeding, belonging to the technical field of rice genetics and breeding design. Background technique [0002] Rice blast is one of the important diseases on rice caused by Magnaporthe oryzae, which has an important impact on rice yield and quality. Breeding and utilizing disease-resistant varieties is one of the most economical and effective methods to control rice blast. However, due to the existence of multiple physiological races of the rice blast fungus, the varieties with a narrow antimicrobial spectrum often have disease resistance after a few years of promotion. reduce. Breeders mainly carry out disease resistance breeding through inoculation identification of rice blast fungus, resistance gene screening and molecular biology methods. To a certain extent, the materials with disease resistance can be screened out, but there is a large workload, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22G06Q10/06G06Q50/02
CPCA01G22/22G06Q10/06393G06Q50/02
Inventor 宛柏杰刘凯赵绍路孙明法严国红唐红生朱国永王爱民张桂云施伟孙一标朱静雯代金英
Owner JIANGSU COASTAL AREA AGRI SCI RES INST
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