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Patil, V. P.; Bjørnstad, Åsmund; MacKey, J.

doi:10.1023/a:1026076511073

Cited by 24 publications

(8 citation statements)

References 51 publications

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“…As expected, no QTL could be detected in this region, because on the one hand only young plants were monitored and on the other hand the advantages of higher plants regarding suppressed spreading of the pathogen is reduced under controlled greenhouse conditions. Also in the region of Rrs4 [26] on 3H no QTL was detected in HEB-25.…”

Section: Chromosome 3hmentioning

confidence: 89%

“…Around 50 QTLs are described on 3H, most of them in the region of Rrs1 (reviewed in [68]). Rrs1 was linked repeatedly to marker MWG680 [20,26,39,69,70] and the marker 11_0315 is derived from the same SNP [22]. The 3H QTL identified by Zantinge et al [71] is linked to seedling and adult plant resistance and located in the region of Rrs1 BC240 [70].…”

Section: Chromosome 3hmentioning

confidence: 99%

“…Although Rrs1 is a major resistance gene sometimes even in resistant plants the fungus is able to complete its life cycle and sporulate [23][24][25]. Additionally, Patil et al [26] mapped a second resistance locus, named Rrs4 CI11549 22 cM distal to Rrs1 on chromosome 3HL. For Rrs2, located on 7HS [27], eight diagnostic markers are described [18].…”

Section: Introductionmentioning

confidence: 99%

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Identification of QTLs conferring resistance to scald (Rhynchosporium commune) in the barley nested association mapping population HEB-25

et al. 2020

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Background Barley scald, caused by the fungus Rhynchosporium commune, is distributed worldwide to all barley growing areas especially in cool and humid climates. Scald is an economically important leaf disease resulting in yield losses of up to 40%. To breed resistant cultivars the identification of quantitative trait loci (QTLs) conferring resistance to scald is necessary. Introgressing promising resistance alleles of wild barley is a way to broaden the genetic basis of scald resistance in cultivated barley. Here, we apply nested association mapping (NAM) to map resistance QTLs in the barley NAM population HEB-25, comprising 1420 lines in BC1S3 generation, derived from crosses of 25 wild barley accessions with cv. Barke. Results In scald infection trials in the greenhouse variability of resistance across and within HEB-25 families was found. NAM based on 33,005 informative SNPs resulted in the identification of eight reliable QTLs for resistance against scald with most wild alleles increasing resistance as compared to cv. Barke. Three of them are located in the region of known resistance genes and two in the regions of QTLs, respectively. The most promising wild allele was found at Rrs17 in one specific wild donor. Also, novel QTLs with beneficial wild allele effects on scald resistance were detected. Conclusions To sum up, wild barley represents a rich resource for scald resistance. As the QTLs were linked to the physical map the identified candidate genes will facilitate cloning of the scald resistance genes. The closely linked flanking molecular markers can be used for marker-assisted selection of the respective resistance genes to integrate them in elite cultivars.

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Section: Chromosome 3hmentioning

confidence: 89%

Section: Chromosome 3hmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identification of QTLs conferring resistance to scald (Rhynchosporium commune) in the barley nested association mapping population HEB-25

et al. 2020

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“…The resistance QTL QTL-IA3H from ‘Abyssinian’ is mapped at 455.3 Mb against four isolates 20 . Major resistance gene Rrs4 is mapped at 523.0 Mb based on marker HVM60 52 .…”

Section: Resultsmentioning

confidence: 99%

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

Zhang

Ovenden

Orchard

et al. 2019

Sci Rep

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The disease scald of barley is caused by the pathogen Rhynchosporium commune and can cause up to 30–40% yield loss in susceptible cultivars. In this study, the Australian barley cultivar ‘Yerong’ was demonstrated to have resistance that differed from Turk (Rrs1 (Rh3 type)) based on seedling tests with 11 R. commune isolates. A doubled haploid population with 177 lines derived from a cross between ‘Yerong’ and the susceptible Australian cultivar ‘Franklin’ was used to identify quantitative trait loci (QTL) for scald resistance. A QTL on chromosome 3H was identified with large effect, consistent with a major gene conferring scald resistance at the seedling stage. Under field conditions, a bivariate analysis was used to model scald percentage of infected leaf area and relative maturity, the residuals from the regression were used as our phenotype for QTL analysis. This analysis identified one major QTL on chromosome 3H, which mapped to the same position as the QTL at seedling stage. The identified QTL on 3H is proposed to be different from the Rrs1 on the basis of seedling resistance against different R. commune isolates and physical map position. This study increases the current understanding of scald resistance and identifies genetic material possessing QTLs useful for the marker-assisted selection of scald resistance in barley breeding programs.

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“…The resistance QTL QTL-IA3H from Abyssinian is mapped at 455.3 Mb against four isolates 19 . Major resistance gene Rrs4 is mapped at 523.0 Mb based on marker HVM60 51…”

Section: Resultsmentioning

confidence: 99%

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

Zhang

Ovenden

Orchard

et al. 2019

Preprint

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Untitled

Cited by 24 publications

References 51 publications

Identification of QTLs conferring resistance to scald (Rhynchosporium commune) in the barley nested association mapping population HEB-25

Identification of QTLs conferring resistance to scald (Rhynchosporium commune) in the barley nested association mapping population HEB-25

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

Bivariate analysis of barley scald resistance with relative maturity reveals a new major QTL on chromosome 3H

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