Variation in nitrogen use efficiency among soft red winter wheat genotypes

D. A. Van Sanford, C. T. MacKown

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Nitrogen use efficiency (NUE), defined as grain dry weight or grain nitrogen as a function of N supply, was evaluated in 25 soft red winter wheat genotypes for two years at one location. Significant genotypic variation was observed for NUE, nitrogen harvest index, and grain yield. Genotype x environment interaction for these traits was not significant. Several variables including N uptake efficiency (total plant N as a function of N supply), grain harvest index, and N concentration at maturity were evaluated for their role in determining differences in NUE. Nitrogen uptake efficiency accounted for 54% of the genotypic variation in NUE for yield and 72% of the genotypic variation in NUE for protein. A path coefficient analysis revealed that the direct effect of uptake efficiency on NUE was high relative to indirect effects.

Original languageEnglish
Pages (from-to)158-163
Number of pages6
JournalTheoretical And Applied Genetics
Volume72
Issue number2
DOIs
StatePublished - Mar 1986

Keywords

  • Nitrogen use efficiency
  • Path coefficients
  • Triticum aestivum, L.

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Genetics

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