数字农科院2.0

Genome-wide association study of agronomic traits related to nitrogen use efficiency in wheat

文献类型： 外文期刊

作者： Shi H.; Chen M.; Gao L.; Wang Y.; Bai Y.; Yan H.; Xu C.; Zhou Y.; Xu Z.; Chen J.; Tang W.; Wang S.; Shi Y.; Wu Y.; Sun D.; Jia J.; Ma Y.

作者机构：

关键词： Agronomy;Efficiency;Nitrogen;Nitrogen fertilizers;Plants (botany);Transcription;Agronomic traits;Candidate genes;Genome-wide association studies;High-nitrogen;Nitrogen tolerance;Nitrogen-use efficiency;Quantitative trait locus;Single nucleotide polymorphisms;Tolerance indices;Wheat varieties;Transcription factors

期刊名称： Theoretical and Applied Genetics

ISSN： 0040-5752

年卷期： 2022 年

页码：

收录情况： SCIE（2022版） ; EI（2022版）

摘要： Key message: GWAS identified 347 QTLs associated with eight traits related to nitrogen use efficiency in a 389-count wheat panel. Four novel candidate transcription factor genes were verified using qRT-PCR. Abstract: Nitrogen is an essential nutrient for plants that determines crop yield. Improving nitrogen use efficiency (NUE) should considerably increase wheat yield and reduce the use of nitrogen fertilisers. However, knowledge on the genetic basis of NUE during wheat maturity is limited. In this study, a diversity panel incorporating 389 wheat accessions was phenotyped for eight NUE-related agronomic traits across five different environments. A total of 347 quantitative trait loci (QTLs) for low nitrogen tolerance indices (ratio of agronomic characters under low and high nitrogen conditions) were identified through a genome-wide association study utilising 397,384 single nucleotide polymorphisms (SNPs) within the MLM (Q + K) model, including 11 stable QTLs. Furthermore, 69 candidate genes were predicted for low nitrogen tolerance indices of best linear unbiased predictions values of the eight studied agronomic traits, and four novel candidate transcription factors (TraesCS5A02G237500 for qFsnR5A.2, TraesCS5B02G384500 and TraesCS5B02G384600 for qSLR5B.1, and TraesCS3B02G068800 for qTKWR3B.1) showed differing expression patterns in contrasting low-nitrogen-tolerant wheat genotypes. Moreover, the number of favourable marker alleles calculated using NUE that were significantly related to SNP in accessions decreased over the decades, indicating a decline in the NUE of the 389 wheat varieties. These findings denote promising NUE markers that could be useful in breeding high-NUE wheat varieties, and the candidate genes could further detail the NUE-related regulation network in wheat. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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