Cytokinin Oxidase Regulates Rice Grain Production
Honda (Japan) · RIKEN Center for Sustainable Resource Science · +3 more institutions
Abstract
Most agriculturally important traits are regulated by genes known as quantitative trait loci (QTLs) derived from natural allelic variations. We here show that a QTL that increases grain productivity in rice, Gn1a, is a gene for cytokinin oxidase/dehydrogenase (OsCKX2), an enzyme that degrades the phytohormone cytokinin. Reduced expression of OsCKX2 causes cytokinin accumulation in inflorescence meristems and increases the number of reproductive organs, resulting in enhanced grain yield. QTL pyramiding to combine loci for grain number and plant height in the same genetic background generated lines exhibiting both beneficial traits. These results provide a strategy for tailormade crop improvement.
Citation impact
- FWCI
- 31.75
- Percentile
- 100%
- References
- 36
Authors
10- MAMotoyuki AshikariCorresponding
Honda (Japan), RIKEN Center for Sustainable Resource Science, Kazusa DNA Research Institute, China National Rice Research Institute, Nagoya University
- HSHitoshi Sakakibara
Honda (Japan), RIKEN Center for Sustainable Resource Science, Kazusa DNA Research Institute, China National Rice Research Institute, Nagoya University
- SLShaoyang Lin
Honda (Japan), RIKEN Center for Sustainable Resource Science, Kazusa DNA Research Institute, China National Rice Research Institute, Nagoya University
- TYToshio Yamamoto
Honda (Japan), RIKEN Center for Sustainable Resource Science, Kazusa DNA Research Institute, China National Rice Research Institute, Nagoya University
- TTTomonori Takashi
Honda (Japan), RIKEN Center for Sustainable Resource Science, Kazusa DNA Research Institute, China National Rice Research Institute, Nagoya University
Topics & keywords
- Cytokinin
- Quantitative trait locus
- Biology
- Inflorescence
- Meristem
- Gene
- Grain yield
- Agronomy
- Zero hunger