Quantitative trait locus analysis of nitrogen use efficiency in barley (Hordeum vulgare L.)

Kindu, Gashu Aynalem; Tang, Jianjun; Yin, Xinyou; Struik, P.C.

doi:10.1007/s10681-014-1138-9

Cited by 34 publications

(31 citation statements)

References 71 publications

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“…Selected field studies were carried with different parental genotypes, population size and type, locations, environments, and years (Table S4 ). Using RILs, several QTLs for NUE (ΔN and NHI) were identified (Mickelson et al, 2003 ; Kindu et al, 2014 ). A number of QTLs involved in YLD were mapped on several chromosomes by using segregating populations (Mansour et al, 2013 ).…”

Section: Resultsmentioning

confidence: 99%

“…Most recent advance on mapping GPC trait showed that a number of novel marker-trait associations were made using GWA study on U.S. barley breeding populations and some QTLs were mapped, along with several other loci that affect YLD (Pauli et al, 2014 ; Mohammadi et al, 2015 ). As two publications lack consensus markers on their maps, it is a challenge to track and normalize the marker location and specifically compare these QTLs within the consensus map (Mickelson et al, 2003 ; Kindu et al, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

“…First, these experiments were evaluated on the basis of whether they were laboratory experiments or field trials. Only field trial studies [an exception goes for Kindu et al ( 2014 ), which directly showed the mapped NUE traits] were accepted and ideally, the experiments were run for more than one season. Second, specific NUE-related agronomic traits were measured, including grain protein content (GPC), grain yield (YLD), grain weight (GW).…”

Section: Methodsmentioning

confidence: 99%

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Identification of Nitrogen Use Efficiency Genes in Barley: Searching for QTLs Controlling Complex Physiological Traits

Han

Wong

et al. 2016

Front. Plant Sci.

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Over the past half century, the use of nitrogen (N) fertilizers has markedly increased crop yields, but with considerable negative effects on the environment and human health. Consequently, there has been a strong push to reduce the amount of N fertilizer used by maximizing the nitrogen use efficiency (NUE) of crops. One approach would be to use classical genetics to improve the NUE of a crop plant. This involves both conventional breeding and quantitative trait loci (QTL) mapping in combination with marker-assisted selection (MAS) to track key regions of the chromosome that segregate for NUE. To achieve this goal, one of initial steps is to characterize the NUE-associated genes, then use the profiles of specific genes to combine plant physiology and genetics to improve plant performance. In this study, on the basis of genetic homology and expression analysis, barley candidate genes from a variety of families that exhibited potential roles in enhancing NUE were identified and mapped. We then performed an analysis of QTLs associated with NUE in field trials and further analyzed their map-location data to narrow the search for these candidate genes. These results provide a novel insight on the identification of NUE genes and for the future prospects, will lead to a more thorough understanding of physiological significances of the diverse gene families that may be associated with NUE in barley.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Identification of Nitrogen Use Efficiency Genes in Barley: Searching for QTLs Controlling Complex Physiological Traits

Han

Wong

et al. 2016

Front. Plant Sci.

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“…Genetic variation for nitrogen use efficiency has been found in potato [35,36] or wheat [37], and genomic regions associated with this trait have been identified in barley [38]. Additionally, studies have shown that nitrogen use efficiency can be improved through agronomic practices [39].…”

Section: Traits and Sources Of Variationmentioning

confidence: 99%

Plant breeding for organic agriculture: something new?

Crespo‐Herrera

Ortíz

2015

Agric & Food Secur

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The role of both organic (OF) and conventional (CF) farming remains open to debate particularly when related to food security and climate change. Targeting plant breeding for OF can contribute to reduce its yield gaps vis-à-vis CF. Currently, the cultivars produced for CF are also used in OF, however, it is unreasonable that all lines bred for CF will always perform well in OF. Nonetheless, plant breeding goals for OF and CF converge at aiming for high productivity, host plant resistance or tolerance to biotic and abiotic factors, and high resource-use efficiency. Likewise end-use quality and local adaptation may be more important for OF as the resource recycling and quality of the inputs that are used vary from region to region, even though OF practices are highly regulated. This article provides an overview on organic plant breeding (OPB) with a perspective from conventional plant breeding, highlights the main traits, their source of variation, and what methods and tools are available for their breeding. It concludes listing some organic crop breeding achievements and providing an outlook on what needs to be done for OPB.

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“…Quantitative trait loci (QTL) for NUE were identified in maize (Agrama et al 1999), barley (Kindu et al 2014), rice (Wei et al 2012) and Arabidopsis (Loudet et al 2003). Molecular analyses of NUE have focused on individual genes whose properties or annotation suggested a role in the regulation of processes related to nitrogen uptake, assimilation or use, such as members of the NRT1 and NRT2 nitrate transporter families (reviewed in Krapp et al 2014;O'Brien et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity for nitrogen use efficiency in Arabidopsis thaliana

Meyer

Gryczka

Neitsch

et al. 2019

Planta

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Main conclusionThe plasticity of plant growth response to differing nitrate availability renders the identification of biomarkers difficult, but allows access to genetic factors as tools to modulate root systems to a wide range of soil conditions. Nitrogen availability is a major determinant of crop yield. While the application of fertiliser substantially increases the yield on poor soils, it also causes nitrate pollution of water resources and high costs for farmers. Increasing nitrogen use efficiency in crop plants is a necessary step to implement low-input agricultural systems. We exploited the genetic diversity present in the worldwide Arabidopsis thaliana population to study adaptive growth patterns and changes in gene expression associated with chronic low nitrate stress, to identify biomarkers associated with good plant performance under low nitrate availability. Arabidopsis accessions were grown on agar plates with limited and sufficient supply of nitrate to measure root system architecture as well as shoot and root fresh weight. Differential gene expression was determined using Affymetrix ATH1 arrays. We show that the response to differing nitrate availability is highly variable in Arabidopsis accessions. Analyses of vegetative shoot growth and root system architecture identified accession-specific reaction modes to cope with limited nitrate availability. Transcription and epigenetic factors were identified as important players in the adaption to limited nitrogen in a global gene expression analysis. Five nitrate-responsive genes emerged as possible biomarkers for NUE in Arabidopsis. The plasticity of plant growth in response to differing nitrate availability in the substrate renders the identification of morphological and molecular features as biomarkers difficult, but at the same time allows access to a multitude of genetic factors which can be used as tools to modulate and adjust root systems to a wide range of soil conditions. Abbreviations NUENitrogen use efficiency (m)RIL (Mixed) recombinant inbred line

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Quantitative trait locus analysis of nitrogen use efficiency in barley (Hordeum vulgare L.)

Cited by 34 publications

References 71 publications

Identification of Nitrogen Use Efficiency Genes in Barley: Searching for QTLs Controlling Complex Physiological Traits

Identification of Nitrogen Use Efficiency Genes in Barley: Searching for QTLs Controlling Complex Physiological Traits

Plant breeding for organic agriculture: something new?

Genetic diversity for nitrogen use efficiency in Arabidopsis thaliana

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