The aim of this study was to clarify the relationship of nitrogen accumulation and transport with yield of
wheat and determine the indicators for the screening of wheat varieties with high nitrogen use efficiency
(NUE). A total of sixteen winter wheat (Triticum aestivum L.) varieties were used to determine fourteen
nitrogen accumulation and transport-related traits as well as yield-related traits in field under irrigated and
rainfed conditions. The correlations between the major nitrogen accumulation and transport-related traits
and yield traits of wheat were analyzed, and the nitrogen use type of the wheat varieties was classified. Results
showed that eight nitrogen accumulation and transport-related traits had significant or highly significant
genetic correlations with yield per plant under the two water regimes. These eight traits were transport
amount of pre- flowering reserve nitrogen and contribution of pre-flowering reserve nitrogen to grain
nitrogen, nitrogen accumulation and transport amount after flowering, nitrogen transport efficiency after
flowering, contribution of nitrogen assimilation to grain nitrogen after flowering, nitrogen utilization
efficiency for grain production and biomass production. These eight traits were used as indicators for a
comprehensive clustering of the wheat materials, and the sixteen varieties were classified into three groups
representing the high NUE, intermediate, and low NUE types, respectively. From the perspective of nitrogen
utilization, efforts must be made in the following aspects to obtain higher yields regardless of irrigated or
rainfed conditions: 1) to improve nitrogen utilization efficiency for grain production and biomass production,
as well as nitrogen accumulation and transport amount after flowering, nitrogen transport efficiency and
contribution of nitrogen assimilation to grain nitrogen after flowering, and 2) to decrease transport amount of
pre- flowering reserve nitrogen and contribution of pre-flowering reserve nitrogen to grain nitrogen.
Clustering analysis genetic correlation high nitrogen use efficiency nitrogen accumulation nitrogen transport winter wheat
Primary Language | English |
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Journal Section | Articles |
Authors | |
Publication Date | December 15, 2019 |
Published in Issue | Year 2019 |
Turkish Journal of Field Crops is published by the Society of Field Crops Science and issued twice a year.
Owner : Prof. Dr. Behçet KIR
Ege University, Faculty of Agriculture,Department of Field Crops
Editor in Chief : Prof. Dr. Emre ILKER
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