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

    9 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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