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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Breeding
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1507827

Breeding for enhanced panicle blast resistance and fragrance in a high-quality japonica rice variety

Provisionally accepted
Junhua Ye Junhua Ye 1Kai Wang Kai Wang 1Yi Wang Yi Wang 2Zhipeng Zhao Zhipeng Zhao 3Ying Yan Ying Yan 1Hang Yang Hang Yang 1Lixia Zhang Lixia Zhang 1Zejun Hu Zejun Hu 1Dapeng Sun Dapeng Sun 1Jianjiang Bai Jianjiang Bai 1Liming Cao Liming Cao 1Shujun Wu Shujun Wu 1*
  • 1 Shanghai Academy of Agricultural Sciences, Shanghai, Shanghai Municipality, China
  • 2 Zhongken Seed Industry Co., Ltd., Shanghai, China
  • 3 Shanghai Agricultural Science and Technology Service Center, Shanghai, China

The final, formatted version of the article will be published soon.

    Huruan1212 (HR1212) is well-regarded for its superior eating and cooking quality in the lower reaches of the Yangtze River in China. Still, its high susceptibility to rice panicle blast and lack of fragrance have limited its further spread and utilization. Pigm and Pi-ta are two dominant genes known for their stable broad-spectrum resistance against rice blast fungus Magnaporthe oryzae, while badh2 is the crucial gene that regulates rice aroma. In this study, we utilized a molecular marker-assisted selection backcrossing strategy to introduce Pigm, Pi-ta, and badh2 into introgressed lines employing re-sequencing for precise genetic background selection. Finally, we selected three introgressed lines, including two that carry Pigm with the highest background recovery rates, showing eating and cooking qualities similar to those of HR1212, and one line that pyramids Pigm, Pi-ta, and badh2, which features a strong aroma. They all displayed significantly enhanced resistance to panicle blast and improved yield compared to HR1212. In conclusion, this study expanded the germplasm resources of japonica, providing a material foundation for enhancing breeding programs aimed at developing rice blast-resistant and high-quality fragrant japonica varieties. Additionally, the study demonstrated that integrating molecular markers and re-sequencing can inform breeders' decision-making more precisely and efficiently.

    Keywords: Pyramiding, Panicle blast resistance, fragrance, Eating and cooking quality, Resequencing

    Received: 08 Oct 2024; Accepted: 06 Dec 2024.

    Copyright: © 2024 Ye, Wang, Wang, Zhao, Yan, Yang, Zhang, Hu, Sun, Bai, Cao and Wu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Shujun Wu, Shanghai Academy of Agricultural Sciences, Shanghai, Shanghai Municipality, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.