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Quantitative trait loci controlling barley powdery mildew and scald resistances in two different barley doubled haploid populations


Li, HB and Zhou, MX, Quantitative trait loci controlling barley powdery mildew and scald resistances in two different barley doubled haploid populations, Molecular Breeding: New Strategies in Plant Improvement, 27, (4) pp. 479-490. ISSN 1380-3743 (2011) [Refereed Article]

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DOI: doi:10.1007/s11032-010-9445-x


Abstract Powdery mildew and scald can cause significant yield loss in barley. In order to identify new resistance genes for powdery mildew and scald in barley, two barley doubled haploid (DH) populations were screened for adult plant resistance in the field and glasshouse under natural infection. The mapping populations included 92 DH lines from the cross of TX9425 9 Franklin and 177 DH lines from the cross of Yerong 9 Franklin. Two quantitative trait loci (QTL) for resistance to powdery mildew were identified in the TX9425 9 Franklin population. These QTL were mapped to chromosomes 7H and 5H, respectively. The phenotypic variation explained by the two QTL detected in this population was 22 and 17%, respectively. Three significant QTL were identified from the Yerong 9 Franklin population for the resistance to powdery mildew; the major one, detected on the short arm of chromosome 1H, explained 66% of phenotypic variation. The major QTL for scald resistance, identified from two different populations which shared a common parent, Franklin, were mapped in the similar position on 3H. However, the Franklin allele provided resistance to one population but susceptibility to the other population. The Yerong allele on 3H showed much better resistance to scald than the Franklin allele, which has not been reported before. Using high-density maps for both populations, some markers which were very close to the resistance genes were identified. Transgression beyond the parents in disease resistances of the DH populations indicates that both small-effect QTLs and genetic background may also have significant contributions towards the resistance.

Item Details

Item Type:Refereed Article
Keywords:Barley QTL Powdery mildew Scald
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Li, HB (Dr Haobing Li)
UTAS Author:Zhou, MX (Professor Meixue Zhou)
ID Code:64236
Year Published:2011
Web of Science® Times Cited:18
Deposited By:Agricultural Science
Deposited On:2010-07-08
Last Modified:2017-11-06

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