New molecular markers linked to qualitative and quantitative powdery mildew and scald resistance genes in barley for dry areas

Sayed, Haitham; Backes, Gunter; Kayyal, Hamed; Yahyaoui, A.; Ceccarelli, Salvatore; Grando, S.; Jahoor, A.; Baum, Michaël

doi:10.1023/b:euph.0000014939.83612.a0

Cited by 21 publications

(14 citation statements)

References 8 publications

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“…In total, 43QTLs and seven genes conferring quantitative and qualitative resistance to R. secalis have been located on individual maps (Abbott et al 1992(Abbott et al , 1995Backes et al 1995;Bjornstad et al , 2004Cheong et al 2006;Garvin et al 1997Garvin et al , 2000Genger et al 2003aGenger et al , b, 2005Gronnerod et al 2002;Jensen et al 2002;Li and Zhou 2011;Patil et al 2003;Pickering et al 2006;Sayed et al 2004;Schweizer et al 1995Schweizer et al , 2004Shtaya et al 2006;Spaner et al 1998;von Korff et al 2005;Wagner et al 2008;Yun et al 2005). Here, we integrated all these QTLs and genes into a consensus map to assess the genetic variation of scald resistance (Fig.…”

Section: Diversity Of Qtls and Genes For Rhynchosporium Resistance Inmentioning

confidence: 99%

“…Other genes include Rrs13 on chromosome 6H (Abbott et al 1995;Genger et al 2003b), Rrs2, Rrs12 and Rrs15 on chromosome 7H (Abbott et al 1992;Genger et al 2003aGenger et al , b, 2005Schweizer et al 1995), Rrs14 on chromosome 1HS (Garvin et al 1997(Garvin et al , 2000 and Rrs16 on chromosome 4HS (Pickering et al 2006). In addition, a number of QTLs for scald resistance have been identified on all chromosomes except chromosome 5H (Backes et al 1995;Li and Zhou 2011;Sayed et al 2004;Spaner et al 1998;Yun et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Combination of seedling and adult plant resistance to leaf scald for stable resistance in barley

Wang

Gupta

Wallwork³

et al. 2014

Mol Breeding

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Rhynchosporium secalis can overcome a single resistance gene of barley in a relatively short period of time. Novel genes and quantitative trait locis (QTLs) are therefore vital to control scald in barley. A population of 220 double haploid lines was developed from a cross of Vlamingh and WABAR2147, where Vlamingh showed adult plant resistance (APR) and WABAR2147 showed seedling resistance to a group of isolates. The population was tested for APR to scald under natural infection in two consecutive seasons in addition to a seedling screen with three isolates. One single gene was mapped to chromosome 6H based on the seedling test, and two QTLs (QSc.VlWa.4H and QSc.VlWa.6H) were mapped to chromosomes 4H and 6H based on APR. Epistatic interaction was observed between the two QTLs, and environment/QTL interaction was only observed for QSc.VlWa.6H which cosegregated with the seedling resistance gene and contributed to basal resistance against scald during whole growth stages. QSc.VlWa.4H explained 42.5 and 57.8 % of the phenotypic variation in the two independent trials when the effect of QSc.VlWa.6H was excluded from the analysis. We developed a high-density consensus genetic map with 7,876 molecular makers and anchored 43 QTLs and 7 genes for scald resistance from different mapping populations. No known QTLs or genes were reported in a similar position to QSc.VlWa.4H, and it was the first major QTL for APR of scald on chromosome 4HS in barley. Combination of the two QTLs achieved better and stable scald resistance across four different environments.

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Section: Diversity Of Qtls and Genes For Rhynchosporium Resistance Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combination of seedling and adult plant resistance to leaf scald for stable resistance in barley

Wang

Gupta

Wallwork³

et al. 2014

Mol Breeding

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“…Chromosomes are oriented with the short arm at the top. References (numbers following the dash for q and R factors): 1 –Abbott et al ., 1992; 2 –Bjørnstad et al ., 2002; 3 –Bjørnstad et al ., 2004; 4 –Cheong et al ., 2006; 5 –Genger et al ., 2005; 6 –Grønnerød et al ., 2002; 7 –Jensen et al ., 2002; 8 –von Korff et al ., 2005; 9 –Patil et al ., 2003; 10 –Pickering et al ., 2006; 11 –Sayed et al ., 2004; 12 –Shtaya et al ., 2006; 13 –Yun et al ., 2005; 14 –Schweizer et al ., 2004, respectively. Letters following the reference numbers refer to distinct QTLs on the same chromosome as suggested by the respective authors.…”

Section: Identifying Sources Of Resistance To R Secalis In Barley Cumentioning

confidence: 99%

“…Variability between trials in the detection of QTLs has been observed (Bjørnstad et al ., 2004; Cheong et al ., 2006; Shtaya et al ., 2006), suggesting environmental sensitivity or isolate‐specificity of the QTLs (Sayed et al ., 2004; von Korff et al ., 2005). Furthermore, QTLs of lesser effect are not easily transferred into different backgrounds, particularly into the spring barley cultivars where there is a greater likelihood of development‐related expression differences.…”

Section: Identifying Sources Of Resistance To R Secalis In Barley Cumentioning

confidence: 99%

“…In a mapping population segregating for two dwarfing genes, sdw1 and ari‐e GP, the rhynchosporium disease data identify two resistance QTLs which co‐locate with these genes (Newton et al ., 2004b). Some of the R. secalis resistance QTLs (Jensen et al ., 2002; Sayed et al ., 2004; von Korff et al ., 2005; Cheong et al ., 2006) are located near to sdw1 in the distal region of 3H, and may be closely linked or pleiotropic expressions of it. Thus, as with wheat and the rain splash‐dispersed pathogen Mycosphaerella graminicola , plant height is strongly correlated with field resistance because increasing height decreases the number of spores transmitted from infected lower leaves to upper leaves in any given splash event (Lovell et al ., 2002).…”

Section: Identifying Sources Of Resistance To R Secalis In Barley Cumentioning

confidence: 99%

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Resistance, epidemiology and sustainable management of Rhynchosporium secalis populations on barley

et al. 2007

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Rhynchosporium secalis is one of the most destructive pathogens of barley worldwide, causing yield decreases of up to 40% and reduced grain quality. Rhynchosporium is a polycyclic disease. Primary inoculum includes conidia produced on crop debris, infected seeds and possibly ascospores, although these have not yet been identified. Secondary disease spread is primarily by splash dispersal of conidia produced on infected leaves, which may be symptomless early in the growing season. Host resistance to R. secalis is mediated by both 'major' or host-specific genes (complete resistance) and 'minor' genes of smaller, generally additive effects (partial resistance). Crop growth stage and plant or canopy architecture can modify the expression of resistance. Resistance genes are distributed unevenly across the barley genome, with most being clustered on the short arms of chromosomes 1H, 3H, 6H and 7H, or in the centromeric region or on the long arm of chromosome 3H. Strategies used to manage rhynchosporium epidemics include cultivar resistance and fungicides, and also cultural practices such as crop rotation, cultivar mixtures and manipulation of sowing date, sowing rate or fertiliser rate. However, the high genetic variability of R. secalis can result in rapid adaptation of pathogen populations to render some of these control strategies ineffective when they are used alone. Sustainable control of rhynchosporium needs to integrate major-gene-mediated resistance, partial resistance and other strategies such as customized fungicide programmes, species or cultivar rotation, resistance gene deployment, clean seed and cultivar mixtures.

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Barley Breeding for Sustainable Production

Ceccarelli¹,

Grando²,

Capettini³

et al. 2007

Breeding Major Food Staples

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New molecular markers linked to qualitative and quantitative powdery mildew and scald resistance genes in barley for dry areas

Cited by 21 publications

References 8 publications

Combination of seedling and adult plant resistance to leaf scald for stable resistance in barley

Combination of seedling and adult plant resistance to leaf scald for stable resistance in barley

Resistance, epidemiology and sustainable management of Rhynchosporium secalis populations on barley

Barley Breeding for Sustainable Production

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