Method for constructing two-in-one evaluation nursery of 'disease-resistant and lodging-resistant' rice breeds

Abstract

The invention provides a method for constructing a two-in-one evaluation nursery of 'disease-resistant and lodging-resistant' rice breeds. The method is characterized by including the steps of selecting the evaluation nursery land, meeting fertilization requirements of the evaluation nursery, meeting pesticide spraying requirements of the evaluation nursery, meeting transplanting standards, managing the rice nutrition growth stage, inducing rice blast in the rice reproductive stage, inducing lodging in the rice reproductive stage, managing the rice reproductive stage, judging 'disease-resistant and lodging-resistant' grades and screening 'disease-resistant and lodging-resistant' rice stock seeds. The method has the advantages that the method can precisely evaluate disease resistance and lodging resistance of related agronomic traits; the method achieves standardized and intensive construction of a seed breeding experimental field by combining a disease-resistant evaluation nursery witha lodging-resistant evaluation nursery; the method can evaluate the disease-resistant and lodging-resistant traits of low-generation rice quickly and weed out defective strains, thereby effectively improving rice breeding efficiency and promoting high-speed development of the rice genetic breeding technology.

Description

technical field [0001] The invention belongs to the technical field of rice genetics and breeding, and in particular relates to a method for constructing a rice breeding "disease resistance and lodging resistance" two-in-one identification nursery. Background technique [0002] Rice blast is one of the important diseases of rice, which can cause a large reduction in yield, and in severe cases, the yield can be reduced by 40% to 50%, and even the grains cannot be harvested. Occurs evenly in all rice regions of the world. The disease occurs everywhere, most of which occur in the leaves and nodes, and can cause different degrees of yield reduction after the occurrence, especially the early and severe occurrence of panicle blast or knot blast, which can cause white ears and even yield. In recent years, the annual occurrence area of ​​rice blast has been increasing year by year, and local outbreaks are not uncommon. At present, rice blast may occur in any year and in any season....

AI Technical Summary

Problems solved by technology

[0004] However, most of the identification methods in the prior art are directly identified in the identification nurseries of various breeding units. Each identification nursery is relatively independent, and there is no unified construction standard. and form a unified appraisal nursery construction standard

[0005] Therefore, the methods of the prior art not only cause unnecessary waste of experimental land, but also cannot realize the accurate identification of relevant agronomic traits, such as disease resistance, lodging resistance, etc., which seriously limits the development of rice genetic breeding technology

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