Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (3): 530-537.DOI: 10.3969/j.issn.1004-1524.20240217

• Crop Science • Previous Articles     Next Articles

Identification of QTLs for stem borer resistance using chromosome segment substitution lines in rice

LEI Zhiwei1,2(), LI Xinxin2,3, XU Heng2, ZHANG Heng2, ZHU Ying2, ZHANG Hua2,*()   

  1. 1. College of Advanced Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, China
    2. State Key Laboratory for Quality and Safety of Agro-Products, Research Center for Crop Molecular Breeding at Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
  • Received:2024-03-08 Online:2025-03-25 Published:2025-04-02

Abstract:

The rice stem borer disaster causes serious damage to rice production in China. However, the genetic mechanisms of stem borer resistance in rice is still unknown, and the breeding of stem borer resistant rice variety faces big challenges. In this study, a set of chromosome segment substitution lines with japonica rice ‘Nipponbare’ as the donor and indica rice ‘9311’ as the recipient were used as materials to conduct a genetic analysis of the traits related to resistance to the rice stem borer. Five quantitative trait loci (QTL) related to resistance to the rice stem borer were identified in the rice genome. Through phenotypic analysis of the relevant substitution lines, it was found that four QTLs derived from japonica rice ‘Nipponbare’ (qRSB1, qRSB3, qRSB4, and qRSB6) could significantly enhance the resistance of indica rice ‘9311’ to the rice stem borer. Meanwhile, based on the genotypic identification results of the relevant substitution lines, the candidate intervals of each QTL in the rice genome were initially determined through physical mapping. The above research results provide a basis for the further fine mapping and candidate gene isolation of these stem borer resistance QTLs and would be beneficial to the breeding of stem borer resistant rice varieties in future.

Key words: rice stem borer, chromosome segment substitution line, QTL mapping, molecular marker

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