A molecular marker primer tightly linked to the major gene Bph57 for resistance to brown planthopper in rice, its marking method and application.

By developing molecular markers closely linked to Bph57, the major gene for resistance to brown planthopper in rice, and using PCR amplification technology to rapidly screen resistant plants, the problems of resistance loss and high cost in traditional breeding methods have been solved, and efficient insect-resistant rice breeding has been achieved.

CN122128454APending Publication Date: 2026-06-02GUANGXI UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI UNIV
Filing Date
2026-03-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively introduce and aggregate different brown planthopper resistance genes, causing insect-resistant rice varieties to gradually lose their resistance after long-term planting. Furthermore, traditional breeding methods are complex, costly, and highly susceptible to environmental influences.

Method used

By developing molecular markers closely linked to Bph57, the major gene for resistance to brown planthopper in rice, and using PCR amplification technology to detect rice genomic DNA, plants carrying the Bph57 gene were rapidly screened, and then breeding was carried out using molecular marker-assisted selection technology.

Benefits of technology

This method enables rapid and accurate identification of rice plants' resistance to brown planthoppers, improving breeding efficiency, shortening the breeding cycle, reducing costs, and increasing the efficiency of selecting insect-resistant rice varieties.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122128454A_ABST
    Figure CN122128454A_ABST
Patent Text Reader

Abstract

This invention provides a molecular marker primer tightly linked to the major brown planthopper resistance gene Bph57 in rice, along with its marking method and application. This invention utilizes genetic linkage analysis of individual F2 plants obtained from crossing the insect-resistant rice variety “Daomushe Late Bengu” (C9) (♂) with 9311 (♀), combined with the brown planthopper resistance levels of F3 families. This analysis identifies the major resistance gene Bph57 carried by the insect-resistant variety C9. The Bph57 region is narrowed down to an approximately 90kb fragment defined by flanking markers 2M26.442 and 2M26.536, and tightly linked to molecular marker 2M26.762. The molecular marker 2M26.762 of this invention effectively detects whether the insect-resistant variety C9 and its derived varieties (lines) contain this major resistance gene locus, significantly improving the selection efficiency for brown planthopper resistance and obtaining brown planthopper-resistant rice varieties (lines) containing Bph57.
Need to check novelty before this filing date? Find Prior Art