Investigation of the effects of the circadian rhythms changes on photosynthesis and yield components

2016 Fiscal Year Final Research Report

• Project/Area Number: 26870319
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crop production science; Science in genetics and breeding
• Research Institution: Kyoto University
• Principal Investigator: Saito Hiroki 京都大学, 農学研究科, 助教 (10536238)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: イネ / 概日リズム / 出穂期 / 光合成 / 突然変異

Outline of Final Research Achievements

Circadian rhythms are the subset of biological rhythms with period, defined as the time to complete one cycle of approximately 24 h. In this study, the effect of slight changes of the circadian rhythms on the yield components were investigated. In first, a mutant line (GP8), which harbored a mPing insertion at the exon of OsPRR59 gene, was selected. Next, the measurement of the circadian rhythms based on delayed fluorescence showed some oscillations, however it needs further investigations and improvements to detect distinct rhythmic oscillations. HS276, which harbored a mutant allele at the Ef7 locus and arrhythmic oscillations in the day-time free-running rhythms, showed that the length of panicles, number of primary branches of panicle and secondary branches of panicle were increased compared with the wild type.

Free Research Field

植物育種学