Optimizing mutation breeding in rice for enhanced herbicide resistance
This research explores optimizing chemical mutagenesis in rice to improve herbicide resistance. By reassessing the traditional 50% survival rule, it aims to determine whether higher mutagen doses, resulting in fewer surviving plants, can increase desirable mutations.
Overview
This innovative approach to mutation breeding in rice seeks to optimize the development of herbicide-resistant strains by challenging the traditional 50% survival rule. Through chemical mutagenesis, the research aims to discover whether higher doses of mutagens, despite resulting in fewer surviving plants, can enhance the frequency of desired genetic mutations. This has the potential to significantly advance targeted mutagenesis techniques and improve resistance systems such as Clearfield, Provisia, and Roxy rice.
Technical specifications
The research involves treating rice with chemical mutagens and observing the effects on mutation frequency. The process includes pre-soaking seeds followed by EMS treatment at various doses to achieve different survival rates. Surviving plants are then subjected to imazamox application and screened for ALS gene mutations using Sanger sequencing. This method allows for the identification of specific mutations such as W574L, S653N, and G654E, which are key indicators of herbicide resistance.
Technology readiness level
The project is at Technology Readiness Level 4, indicating that it has been validated in a laboratory environment. Future validation will involve controlled growth and mutation screening in a phytotron setting to further confirm the efficacy of different mutagen doses.
About Black Sea Agricultural Research Institute
Black Sea Agricultural Research Institute is a national government research institute based in Samsun, combining laboratories with multi‑site experimental fields to serve growers, agrifood companies, and public agencies across the Black Sea region. Industry partners engage through fee‑for‑service soil, water, and plant analysis and through plant health laboratories that provide diagnostics and import/export quarantine testing. Dedicated bioenergy facilities characterize biomass and fuels and offer bench‑scale biodiesel, bioethanol, pellet, and briquette production with quality testing. Core funding comes from Türkiye’s Ministry of Agriculture and Forestry via its research directorate, with additional support from national science programs and select international development sources. Commercialization pathways include varietal registration, certified seed/seedling multiplication under contract, and published laboratory service menus that ease collaboration.
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