Finlay–Wilkinson's regression coefficient as a pre-screening criterion for yield responsiveness to elevated atmospheric CO2 concentration in crops

Etsushi Kumagai, Koki Homma, Eiki Kuroda, Hiroyuki Shimono

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The rising atmospheric CO2 concentration ([CO2]) can increase crop productivity, but there are likely to be intraspecific variations in the response. To meet future world food demand, screening for genotypes with high [CO2] responsiveness will be a useful option, but there is no criterion for high [CO2] responsiveness. We hypothesized that the Finlay–Wilkinson regression coefficient (RC) (for the relationship between a genotype's yield versus the mean yield of all genotypes in a specific environment) could serve as a pre-screening criterion for identifying genotypes that respond strongly to elevated [CO2]. We collected datasets on the yield of 6 rice and 10 soybean genotypes along environmental gradients and compared their responsiveness to elevated [CO2] based on the regression coefficients (i.e. the increases of yield per 100 µmol mol−1 [CO2]) identified in previous reports. We found significant positive correlations between the RCs and the responsiveness of yield to elevated [CO2] in both rice and soybean. This result raises the possibility that the coefficient of the Finlay–Wilkinson relationship could be used as a pre-screening criterion for [CO2] responsiveness.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalPhysiologia Plantarum
Volume158
Issue number3
DOIs
Publication statusPublished - 2016 Nov 1

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science
  • Cell Biology

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