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Net blotch and scald are the two prevalent foliar diseases of barley (Hordeum vulgare L.) in Tunisia, causing significant losses in yield and quality of seeds. Their impact can be reduced with the identification and use of effective sources of resistance. In order to identify genotypes with double resistance to net blotch and scald, 91 inbred barley lines derived from crosses between susceptible cultivars to net blotch were screened at the adult growth stage in the field. Net blotch and scald reactions were evaluated two times using the mass disease index (MDI). The least significant difference (LSD) test showed that 62.1 and 37.8% of the screened total lines had the highest level of resistance to both net blotch and scald for the first and the second assessments, respectively. Furthermore, the evaluated lines were partitioned into four groups according to their simultaneous reaction to both diseases. For the first assessment, 45 lines were considered to be resistant to both diseases with MDIs lower than 7.5 and 1.16% for net blotch and scald, respectively. For the second assessment, 40 lines were resistant to both Pyrenophora teres and Rhynchosporium secalis, with. MDIs lower than 20.95% for P. teres and 3.34% for R. secalis. The two methods used in this investigation are efficient to select barely inbred lines tolerant to both diseases. The selected lines could be used in plant breeding programmes for disease resistance after validation of their resistance.
Leaf scald (Rhynchosporium secalis) of barley (Hordeum vulgare L.) is a serious disease in many barley-growing areas in Tunisia. A doubled-haploid barley population from a cross between the two-rowed cultivar 'Roho' and the six-rowed line '90' was evaluated for its resistance at the seedling stage to three isolates (Bousalem2, Krib5 and Teboursouk4) of R. secalis. The obtained frequency distributions suggest that resistance to Bousalem2 and Teboursouk4 isolates were polygenic whereas resistance to Krib5 isolate seems to be governed by two complementary genes. Heritability of the resistance to all isolates was relatively high (64%), although the genotype × isolate interaction effects were significant. Analysis of variance indicated that scald resistance was not dependent on row type. Three QTLs localised on chromosomes 3H, 4H and 6H were identified by the individual marker analysis with the Marker × Isolate interaction model.
1989 •
Australian Journal of …
Mapping of Genomic Regions Associated With Net Form of Netblotch Resistance In Barley2003 •
European Journal of Plant Pathology
Control of foliar diseases in barley: towards an integrated approach2012 •
Plant Breeding
Variation in Ethiopian barley landrace populations for resistance to barley leaf scald and netblotch1998 •
2003 •
2005 •
Abstract Barley is an important cereal crop with a size of approx. 5300 Mb per haploid genome. This is too large to be considered for whole-genome sequencing. But barley genome resources including the Morex BAC library, abundant ESTs, and 22K microarray enable researchers to access the barley genome. We aim to couple these resources to accelerate a transition to comprehensive physical mapping and sequencing of the barley “gene-space”.
2008 •
Fungal Genetics and Biology
Genetic mapping of Pyrenophora teres f. teres genes conferring avirulence on barley2007 •
2006 •
1997 •
Australasian Plant Pathology
Mixing feed barley cultivars did not decrease leaf disease or increase grain yield2008 •
2000 •
Agricultural and Food Science
Efficacy of fungicide tebuconazole in barley varieties with different resistance level2010 •
Plant Pathology
Field-based experimental evolution of three cereal pathogens using a mark-release-recapture strategy2013 •
Australasian Plant Pathology
Sequence conservation in the mitochondrial cytochrome b gene and lack of G143A QoI resistance allele in a global sample of Rhynchosporium secalis2009 •
Functional Plant Biology
Identification and characterisation of barley ( Hordeum vulgare ) respiratory burst oxidase homologue family members2008 •
Theoretical and Applied Genetics
QTL analysis of root-lesion nematode resistance in barley: 1. Pratylenchus neglectus2011 •
Plant Pathology
An assay for quantitative virulence in Rhynchosporium commune reveals an association between effector genotype and virulence2014 •
European Journal of Plant Pathology
Genetic variation for resistance to septoria tritici blotch in Iranian tetraploid wheat landraces2012 •
2001 •
2008 •
Journal of Plant Physiology
When and how to kill a plant cell: Infection strategies of plant pathogenic fungi2011 •
Physiological and Molecular Plant Pathology
Initial characterisation of phytotoxic proteins isolated from Pyrenophora teres2008 •
Fungal Genetics and Biology
Discovery of a functional Mycosphaerella teleomorph in the presumed asexual barley pathogen Septoria passerinii2007 •
2008 •
2004 •
2008 •
2006 •
Phytopathology
Differential Selection on Rhynchosporium secalis During Parasitic and Saprophytic Phases in the Barley Scald Disease Cycle2006 •
2008 •