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Genetic Variation for Nitrogen Remobilization and Postsilking Nitrogen Uptake in Maize Recombinant Inbred Lines: Heritabilities and Correlations among Traits

^a Station de Génétique Végétale, INRA-UPS-INAPG-CNRS, Ferme du Moulon, 91190 Gif/Yvette, France
^b Syngenta Seeds, 12 Chemin de L'Hobit, BP 27, 31790 Saint-Sauveur, France

View larger version (20K): [in this window] [in a new window]   Figure 1. Determination of the proportion of remobilized N and of postsilking N uptake allocated to kernels (tupK) in the year 2004 knowing (i) NHI and % postsilking N uptake (continuous line) and (ii) direct estimated proportion of N remobilized by the 15N method and proportion of 15N taken up after silking (discontinuous line). The unbiased estimates of proportion of N remobilized (trem) and proportion of postsilking N uptake allocated to kernels (tupK) are given by the coordinates of the intersection of both lines. This is a graphical solution of the two-equation system (Eq. [2]) with the derivation of an approximate confidence interval for tupK.