Nitrogen use efficiency parameters of twelve bread wheat cultivars were studied in nine environments comprised of three nitrogen applications tested over three years. An environment-by-trait association biplot and a trait-association by environment biplot were applied to understand environmental effects on these traits and relationships among them. The following trait associations were relatively stable across environments: negative associations of straw nitrogen content vs. nitrogen remobilization efficiency, straw nitrogen content vs. nitrogen harvest index and a positive association of nitrogen remobilization efficiency vs. nitrogen harvest index. The selection of genotypes with a high nitrogen harvest index and nitrogen remobilization efficiency could be used in the development of cultivars with desired nitrogen use efficiency. A low straw nitrogen content can also be used as a reliable and cost-effective indicator in the selection of genotypes with high nitrogen use efficiency.
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Communicated by R.K. Behl
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Gorjanović, B., Kraljević-Balalić, M. & Janković, S. Environmental effects on associations among nitrogen use efficiency traits in wheat. CEREAL RESEARCH COMMUNICATIONS 38, 146–153 (2010). https://doi.org/10.1556/CRC.38.2010.1.15
- nitrogen use efficiency
- trait association-by-environment biplot