Bymovirus-induced yellow mosaic diseases in barley and wheat: viruses, genetic resistances and functional aspects

Key message We mapped the Rym14Hb resistance locus to barley yellow mosaic disease in a 2Mbp interval. The co-segregating markers will be instrumental for marker-assisted selection in barley breeding. Abstract Barley yellow mosaic disease is caused by Barley yellow mosaic virus and Barley mild mosaic virus and leads to severe yield losses in barley (Hordeum vulgare) in Central Europe and East-Asia. Several resistance loci are used in barley breeding. However, cases of resistance-breaking viral strains are known, raising concerns about the durability of those genes. Rym14Hb is a dominant major resistance gene on chromosome 6HS, originating from barley’s secondary genepool wild relative Hordeum bulbosum. As such, the resistance mechanism may represent a case of non-host resistance, which could enhance its durability. A susceptible barley variety and a resistant H. bulbosum introgression line were crossed to produce a large F2 mapping population (n = 7500), to compensate for a ten-fold reduction in recombination rate compared to intraspecific barley crosses. After high-throughput genotyping, the Rym14Hb locus was assigned to a 2Mbp telomeric interval on chromosome 6HS. The co-segregating markers developed in this study can be used for marker-assisted introgression of this locus into barley elite germplasm with a minimum of linkage drag.

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Section: Introductionmentioning

confidence: 99%

High-resolution mapping of Rym14Hb, a wild relative resistance gene to barley yellow mosaic disease

et al. 2020

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“…A number of related viruses, namely Barley yellow mosaic virus (BaYMV), Barley mild mosaic virus (BaMMV), Wheat yellow mosaic virus (WYMV) and Wheat spindle streak mosaic virus (WSSMV), are also transmissable by P. graminis. A sustained effort to identify genetic sources of resistance in barley to BaYMV and/or BaMMV has documented to date 22 genes, including rym1 through rym19, although some of these represent alleles at a single locus rather than independent genes (Jiang et al 2020); most of the resistances encoded by these genes are recessive. The product of the rym4/rym5 alleles is a translation initiation factor (Stein et al 2005), while the resistance encoded by rym1/rym11 results from deletions in a gene encoding a protein disulfide isomerase-like protein (Yang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The product of the rym4/rym5 alleles is a translation initiation factor (Stein et al 2005), while the resistance encoded by rym1/rym11 results from deletions in a gene encoding a protein disulfide isomerase-like protein (Yang et al 2014). Following analysis based on the quantitative trait locus (QTL) approach, genes for resistance in bread wheat to WYMV have been mapped to regions on chromosome arms 2DL and 3BS (Suzuki et al 2015, Zhu et al 2012, 6DS (Yamashita et al 2020) and the other chromosomes (Jiang et al 2020), while a locus for resistance to WSSMV has been identified on chromosome arm 2DL (Khan et al 2000). With respect to SBWMV, the presence of Sbm1, a gene mapping to the distal end of the bread wheat chromosome arm 5DL, has been correlated with a measure of resistance (Hao et al 2012, Narasimhamoorthy et al 2006, with a smaller contribution from the chromosome arm 2BS locus Sbm2 (Bayles et al 2007).…”

Section: Introductionmentioning

confidence: 99%

A genetic analysis of the resistance in barley to <i>Soil-borne wheat mosaic virus</i>

Okada¹,

Kato²,

Oikawa

et al. 2020

Breed. Sci.

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Soil-borne wheat mosaic virus (SBWMV), a ubiquitous pathogen commonly encountered in temperate regions of the Northern hemisphere, can damage a number of economically important cereal crops, notably wheat and barley. Given that the plasmodiophorid cercozoan Polymyxa graminis, which acts as the vector of SBWMV, can survive in the soil for many decades, the only feasible control measure is the deployment of resistant cultivars. Here, a quantitative trait locus (QTL) approach was taken to characterize the genetic basis of the SBWMV resistance exhibited by the barley cultivar Haruna Nijo. The analysis revealed that between 33% and 41% of the variation for the measure chosen to represent resistance was under the control of a gene(s) mapping to a region at the distal end of the short arm of chromosome 2H. In contrast to most of the genes known to encode resistance to soil-borne mosaic viruses, the allele specifying resistance was dominant over those present in a susceptible genotype.

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“…To date, 20 barley resistance genes have been identified, almost exclusively conferring recessive resistance (Jiang et al 2020). Two of these loci have been cloned: the EUKARYOTIC TRANSLATION INITIATION FACTOR 4E gene (eIF4E), (Stein et al 2005) of which several allelic forms providing resistance are described, including rym4 and rym5, (Hofinger et al 2011;Perovic et al 2014;Yang et al 2017;Shi et al 2019), and the PROTEIN DISULFIDE ISOMERASE LIKE 5-1 (PDI5-1) gene which is also represented by a handful of alleles providing resistance, including rym1 and rym11 (Yang et al 2017).…”

Section: Introductionmentioning

confidence: 99%

High-resolution mapping ofRym14^Hb, a wild relative resistance gene to barley yellow mosaic disease

Pidon

Wendler

Habekuβ

et al. 2020

Preprint

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Barley yellow mosaic disease is caused by Barley yellow mosaic virus and Barley mild mosaic virus, and leads to severe yield losses in barley (Hordeum vulgare) in Central Europe and East-Asia. Several resistance loci are used in barley breeding. However, cases of resistance-breaking viral strains are known, raising concerns about the durability of those genes. Rym14Hb is a dominant major resistance gene on chromosome 6HS, originating from barley’s secondary genepool wild relative Hordeum bulbosum. As such, the resistance mechanism may represent a case of non-host resistance, which could enhance its durability. A susceptible barley variety and a resistant H. bulbosum introgression line were crossed to produce a large F2 mapping population (n=7,500), to compensate for a ten-fold reduction in recombination rate compared to intraspecific barley crosses. After high-throughput genotyping, the Rym14Hb locus was assigned to a 2Mbp telomeric interval on chromosome 6HS. The co-segregating markers developed in this study can be used for marker-assisted introgression of this locus into barley elite germplasm with a minimum of linkage drag.

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Bymovirus-induced yellow mosaic diseases in barley and wheat: viruses, genetic resistances and functional aspects

Cited by 49 publications

References 183 publications

High-resolution mapping of Rym14Hb, a wild relative resistance gene to barley yellow mosaic disease

High-resolution mapping of Rym14Hb, a wild relative resistance gene to barley yellow mosaic disease

A genetic analysis of the resistance in barley to <i>Soil-borne wheat mosaic virus</i>

High-resolution mapping ofRym14^Hb, a wild relative resistance gene to barley yellow mosaic disease

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Bymovirus-induced yellow mosaic diseases in barley and wheat: viruses, genetic resistances and functional aspects

Cited by 49 publications

References 183 publications

High-resolution mapping of Rym14Hb, a wild relative resistance gene to barley yellow mosaic disease

High-resolution mapping of Rym14Hb, a wild relative resistance gene to barley yellow mosaic disease

A genetic analysis of the resistance in barley to <i>Soil-borne wheat mosaic virus</i>

High-resolution mapping ofRym14Hb, a wild relative resistance gene to barley yellow mosaic disease

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High-resolution mapping ofRym14^Hb, a wild relative resistance gene to barley yellow mosaic disease