Labs and Faculty
Inter-Institutional Cooperative Laboratories
Laboratory of Applied Bioresources

HORI Kiyosumi Assoc. Prof. Ph.D.

Other Affiliations: Institute of Crop Science, National Agriculture and Food Research Organization

Plant genetics and breeding


Rice, Genetic resources, Grain quality, Agronomic traits, Genome-based breeding


Climate change is causing large fluctuations in temperature, solar irradiation, precipitation, and soil moisture in all over the world. These environmental fluctuations have cause increasing crop disease and pest, shifting crop cultivation areas, and becoming difficult to produce enough crops in the conventional cultivation areas. To develop climate-change resilient crops, it is necessary to elucidate the genetic basis of plant response to ambient environmental changes. We have detected a lot of important genes involving agronomic traits, such as grain quality, eating quality, yield, flowering time, disease resistance, seed dormancy and root architecture, and we elucidate their molecular functions and biological mechanisms. By using these fundamental research results, we are trying to propose next-generation genome breeding methodology to allow improving complicated quantitative traits.


Rice (Oryza sativa L.) is the most important food crop in the world, being a staple food for more than half of the world’s population. Recent improvements in living standards have increased the worldwide demand for high-yielding and high-quality rice cultivars. Rice has about 40,000 genes, but detailed molecular functions of almost genes are still unknown. We can use a lot of molecular research materials and methods now such as natural variation, mutants, transgenic lines, genome editing lines, and omics analysis such as genomics, transcriptomics, proteomics, epigenetics, and metabolomics. These significant research tools enable the development of novel rice cultivars showing superior agronomic performance and high climate resilience. Rice is one of model plant species for genomic and genetic studies. Therefore, our results can be used for genetic elucidation and breeding application in not only rice, but also other cereals, vegetables, and fruit tree crops.

  • Identification for grain quality genes overcoming crop damages by climate change and global warming

  • Application of fundamental research results to genome-based breeding for developing rice cultivars for various food usage


2019- Present. Associate Professor, Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo
2016- Present. Principal Researcher, Institute of Crop Science, National Agriculture and Food Research Organization
2011-2016. Senior Researcher, National Institute of Agrobiological Sciences
2006-2011. Researcher, National Institute of Agrobiological Sciences
2004-2006. Research Fellow, Institute of Plant Science and Resources, Okayama University
2006. PhD, Graduate School of National Science and Technology, Okayama University