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Variation in nitrogen accumulation in grain and leaf in spring barley genotypes

Variation in nitrogen accumulation in grain and leaf in spring barley genotypes Requirements of barley grain protein concentration vary depending on the end‐use purpose of the grain. High protein levels are desired for high‐quality feed and food, whereas relatively low protein levels are preferred for malting. The current study evaluated variation of grain protein concentration and nitrogen (N) concentration in flag leaves among barley genotypes with diverse backgrounds. A panel of 79 spring barley genotypes was grown in field experiments under well‐watered and drought‐stressed conditions over two growing seasons. In each water regime, variation in flag leaf N concentration (only under drought‐stressed conditions), grain protein concentration, grain yield and other agronomic parameters was found among genotypes. Based on grain protein and flag leaf N concentration, four broad genotype categories were found: high values for both, low values for both, low grain protein with high flag leaf N and high grain protein with low flag leaf N. This grouping suggests variation in N remobilization from vegetative tissues to grain. Germplasm identified in the present study will enable further study of the mechanisms regulating protein accumulation in barley and contribute to the development of barley germplasm for various end uses. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Variation in nitrogen accumulation in grain and leaf in spring barley genotypes

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References (50)

Publisher
Wiley
Copyright
Copyright © 2022 Wiley‐VCH GmbH
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/jac.12500
Publisher site
See Article on Publisher Site

Abstract

Requirements of barley grain protein concentration vary depending on the end‐use purpose of the grain. High protein levels are desired for high‐quality feed and food, whereas relatively low protein levels are preferred for malting. The current study evaluated variation of grain protein concentration and nitrogen (N) concentration in flag leaves among barley genotypes with diverse backgrounds. A panel of 79 spring barley genotypes was grown in field experiments under well‐watered and drought‐stressed conditions over two growing seasons. In each water regime, variation in flag leaf N concentration (only under drought‐stressed conditions), grain protein concentration, grain yield and other agronomic parameters was found among genotypes. Based on grain protein and flag leaf N concentration, four broad genotype categories were found: high values for both, low values for both, low grain protein with high flag leaf N and high grain protein with low flag leaf N. This grouping suggests variation in N remobilization from vegetative tissues to grain. Germplasm identified in the present study will enable further study of the mechanisms regulating protein accumulation in barley and contribute to the development of barley germplasm for various end uses.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Oct 1, 2022

Keywords: cluster analysis; flag leaf N concentration; grain protein; grain yield; N uptake; water regime

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