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- W3189187862 abstract "Nitrogen (N) is one of the most important macronutrients for crop growth and development. Large amounts of N fertilizers are applied exogenously to improve grain yield and quality, which has led to environmental pollution and high cost of production. Therefore, improvement of N use efficiency (NUE) is a very important aspect for sustainable agriculture. Here, a pilot experiment was firstly conducted with a set of barley genotypes with confirmed NUE to validate the fast NUE screening, using chlorate as an analogue to nitrate. High NUE genotypes were susceptible to chlorate-induced toxicity whereas the low NUE genotypes were tolerant. A total of 180 barley RILs derived from four parents (Compass, GrangeR, Lockyer and La Trobe) were further screened for NUE. Leaf chlorosis induced by chlorate toxicity was the key parameter observed which was later related to low-N tolerance of the RILs. There was a distinct variation in chlorate susceptibility of the RILs with leaf chlorosis in the oldest leaf ranging from 10 to 80%. A genome-wide association study (GWAS) identified 9 significant marker-trait associations (MTAs) conferring high chlorate sensitivity on chromosomes 2H (2), 3H (1), 4H (4), 5H (1) and Un (1). Genes flanking with these markers were retrieved as potential targets for genetic improvement of NUE. Genes encoding Ferredoxin 3, leucine-rich receptor-like protein kinase family protein and receptor kinase are responsive to N stress. MTA4H5468 which exhibits concordance with high NUE phenotype can further be explored under different genetic backgrounds and successfully applied in marker-assisted selection.The online version contains supplementary material available at 10.1007/s11032-021-01239-8." @default.
- W3189187862 created "2021-08-16" @default.
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- W3189187862 date "2021-07-01" @default.
- W3189187862 modified "2023-09-30" @default.
- W3189187862 title "Using chlorate as an analogue to nitrate to identify candidate genes for nitrogen use efficiency in barley" @default.
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- W3189187862 doi "https://doi.org/10.1007/s11032-021-01239-8" @default.
- W3189187862 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37309383" @default.
- W3189187862 hasPublicationYear "2021" @default.
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