Quantitative trait loci for large sink capacity enhance rice grain yield under free-air CO2 enrichment conditions

Scientific Reports
Hiroshi NakanoMotohiko Kondo

Abstract

The global atmospheric CO2 concentration has been increasing annually. To determine the trait that effectively increases rice (Oryza sativa L.) grain yield under increased atmospheric CO2 concentrations, as predicted in the near future, we grew a chromosome segment substitution line (CSSL) and a near-isogenic line (NIL) producing high spikelet numbers per panicle (CSSL-GN1 and NIL-APO1, respectively) under free-air CO2 enrichment (FACE) conditions and examined the effects of a large sink capacity on grain yield, its components, and growth-related traits under increased atmospheric CO2 concentrations. Under ambient conditions, CSSL-GN1 and NIL-APO1 exhibited a similar grain yield to Koshihikari, as a result of the trade-off between increased spikelet number and reduced grain filling. However, under FACE conditions, CSSL-GN1 and NIL-APO1 had an equal or a higher grain yield than Koshihikari because of the higher number of spikelets and lower reduction in grain filling. Thus, the improvement of source activity by increased atmospheric CO2 concentrations can lead to enhanced grain yield in rice lines that have a large sink capacity. Therefore, introducing alleles that increase sink capacity into conventional varieties represents a ...Continue Reading

References

Sep 21, 2004·Annual Review of Plant Biology·Stephen P LongDonald R Ort
Jun 25, 2005·Science·Motoyuki AshikariMakoto Matsuoka
Apr 30, 2009·Journal of Experimental Botany·Andrew D B LeakeyDonald R Ort
Oct 16, 2015·Global Change Biology·Yasuhiro UsuiToshihiro Hasegawa
Mar 1, 2013·Functional Plant Biology : FPB·Toshihiro HasegawaAmane Makino

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Citations

Jan 1, 2018·Functional Plant Biology : FPB·Hiroyuki ShimonoElizabeth A Pinkard
Apr 27, 2019·Frontiers in Plant Science·Toshihiro HasegawaKentaro Hayashi
Oct 23, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Debabrata PandaKartik Lenka
May 6, 2021·International Journal of Molecular Sciences·Oluwaseun Olayemi AlukoHaobao Liu

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