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

Abstract

The rising atmospheric CO concentration ([CO ]) 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 [CO ] responsiveness will be a useful option, but there is no criterion for high [CO ] 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 [CO ]. We collected datasets on the yield of 6 rice and 10 soybean genotypes along environmental gradients and compared their responsiveness to elevated [CO ] based on the regression coefficients (i.e. the increases of yield per 100 µmol mol [CO ]) identified in previous reports. We found significant positive correlations between the RCs and the responsiveness of yield to elevated [CO ] 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 [CO ] responsiveness.

Genome‐wide association mapping for phenotypic plasticity in rice

“…Under favourable environmental conditions, plant growth generally benefits from increased availability of resources, including elevated atmospheric CO 2 concentration ([CO 2 ]) (e.g. Moya et al, 1998;Shimono et al, 2009, Shimono andOkada, 2013;Hasegawa et al, 2013;Bishop et al, 2015;Kumagai et al, 2016). The gain in productivity under resource enrichment is known to vary among species and among subspecies and varieties (Moya et al, 1998;Baker, 2004;Shimono et al, 2009;Yang et al, 2009;Shimono and Okada, 2013;Hasegawa et al, 2013;Bishop et al, 2015).…”

“…Phenotypic plasticity is the ability of a genotype to change its physiological and molecular expression or performance in response to environmental variation (Bradshaw ; Kumagai et al , ). Plasticity could be under genetic control and is therefore subject to natural selection.…”

Canalization of Tomato Fruit Metabolism

“…More recently, the analysisof stability has been extended beyond the evaluation of yields to qualityrelated and physiological traits (Dia et al, 2016;Kumagai et al, 2016).…”

Mining a yield-trial database to identify high-yielding cultivars by simulation modeling: a case study for rice

“…This increase by 70 ppm would have increased yield by 5~10 Kumagai et al, 2016 . Third, we did not account for water and thus soil temperature in the model. In rice paddies, the water temperature may differ greatly from the air temperature, especially in regions with a cool climate, where rice growth is influenced more by the water temperature than by the air temperature Shimono et al, 2002 .…”