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. 2016 Mar 24;67(9):2787–2798. doi: 10.1093/jxb/erw116

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© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Linear regression of the relationship between the stable carbon isotope composition in mature grains (δ¹³C_grain) and the combination of δ¹³C from awns and the peduncle (δ¹³C_awns+δ¹³C_peduncle) in the water-soluble fraction (WSF) during the 2013 crop season (R²=0.58; P=0.001). Closed symbols (original data) indicate raw data, and open symbols (estimated data) indicate original data with a correction factor of 0.8 ‰ (see ‘Materials and methods’ and Supplementary Table S2). The six genotypes and three replications per genotype were considered, accounting for a total of 18 plots. For each plot the relative weight assigned to the δ¹³C of each of the two organs depended on the water status of the plot assessed by its δ¹³C_grains (see figure inset). The experiment was performed under field conditions at the CIMMYT’s Experimental Station, Norman E. Borlaug (CENEB), under fully irrigated conditions.