Unraveling Genomic Regions Controlling Root Traits As a Function of Nitrogen Availability in the MAGIC Wheat Population WM-800

Overview

Journal Plants (Basel)

Date 2022 Dec 23

PMID 36559632

Authors

Laura Schmidt

Kerstin A Nagel

Anna Galinski

Wiebke Sannemann

Klaus Pillen

Andreas Maurer

Affiliations

Soon will be listed here.

Abstract

An ever-growing world population demands to be fed in the future and environmental protection and climate change need to be taken into account. An important factor here is nitrogen uptake efficiency (NUpE), which is influenced by the root system (the interface between plant and soil). To understand the natural variation of root system architecture (RSA) as a function of nitrogen (N) availability, a subset of the multiparent advanced generation intercross (MAGIC) winter wheat population WM-800 was phenotyped under two contrasting N treatments in a high-throughput phenotyping system at the seedling stage. Fourteen root and shoot traits were measured. Subsequently, these traits were genetically analyzed using 13,060 polymorphic haplotypes and SNPs in a genome-wide association study (GWAS). In total, 64 quantitative trait loci (QTL) were detected; 60 of them were N treatment specific. Candidate genes for the detected QTL included and genes involved in stress signaling under N-, whereas candidate genes under N+ were more associated with general growth, such as and . This finding may indicate (i) a disparity of the genetic control of root development under low and high N supply and, furthermore, (ii) the need for an N specific selection of genes and genotypes in breeding new wheat cultivars with improved NUpE.

Citing Articles

Genome-Wide Association Study on Seedling Phenotypic Traits of Wheat under Different Nitrogen Conditions.

Hu C, Li J, Liu J, Zhang D, Jin L, Yang N Plants (Basel). 2023; 12(23).

PMID: 38068685 PMC: 10707948. DOI: 10.3390/plants12234050.

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