Variability for nitrogen management in genetically-distant maize (<em>Zea mays</em> L.) lines: impact of post-silking nitrogen limiting conditions - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Agronomy Année : 2018

Variability for nitrogen management in genetically-distant maize (Zea mays L.) lines: impact of post-silking nitrogen limiting conditions

Résumé

The impact of nitrogen (N)-limiting conditions after silking on kernel yield (KY)-related traits and whole plant N management was investigated using fifteen maize lines representative of plant genetic diversity in Europe and America. A large level of genetic variability of these traits was observed in the different lines when post-silking fertilization of N was strongly reduced. Under such N-fertilization conditions, four different groups of lines were identified on the basis of KY and kernel N content. Although the pattern of N management, including N uptake and N use was variable in the four groups of lines, a number of them were able to maintain both a high yield and a high kernel N content by increasing shoot N remobilization. No obvious relationship between the genetic background of the lines and their mode of N management was found. When N was limiting after silking, N remobilization appeared to be a good predictive marker for identifying maize lines that were able to maintain a high yield and a high kernel N content irrespective of their female flowering date. The use of N remobilization as a trait to select maize genotypes adapted to low N input is discussed.
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hal-02622513 , version 1 (26-05-2020)

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Isabelle Quillere, Céline Dargel-Graffin, Peter J. Lea, Bertrand Hirel. Variability for nitrogen management in genetically-distant maize (Zea mays L.) lines: impact of post-silking nitrogen limiting conditions. Agronomy, 2018, 8, pp.1-12. ⟨10.3390/agronomy8120309⟩. ⟨hal-02622513⟩
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