Diversity within and among Ethiopian barley (Hordeum vulgare L.) landraces in resistance to barley net blotch (Pyrenophora teres F. teres (Ptt))

2021 ◽  
Author(s):  
Allo A. Dido ◽  
Kassahun Tesfaye ◽  
M. S. R. Krishna ◽  
Dawit T. Degefu ◽  
B. J. K. Singh
Keyword(s):  
Hordeum Vulgare ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Hordeum Vulgare L ◽  
Barley Net Blotch

Genetic studies on net blotch resistance in a barley cross

1996 ◽  
Vol 76 (4) ◽  
pp. 715-719 ◽  
Author(s):  
K.M. Ho ◽  
T.M. Choo ◽  
A. Tekauz ◽  
R.A. Martin
Keyword(s):  
Hordeum Vulgare ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Pyrenophora Teres ◽  
Chromosome 2 ◽  
Net Blotch ◽  
Hordeum Vulgare L ◽  
Key Words Barley ◽  
Recessive Genes ◽  
Selection For

An investigation was initiated to study the genetics of resistance to three isolates of Pyrenophora teres (WRS102, WRS858, and WRS857), which have been routinely used for screening for net blotch resistance in Canada. The F1, F2, and doubled-haploid lines were derived from a Leger/CI9831 cross of barley (Hordeum vulgare L.). These materials, along with their parents, were inoculated with each of the three isolates at the three-leaf stage in growth chambers. Results showed that resistance to WRS102 was controlled by three recessive genes, resistance to WRS858 by one recessive gene, and resistance to WRS857 by either one dominant gene or two complementary genes. One of the WRS102-resistance genes appeared to be on chromosome 2 and another linked to the WRS858-resistance gene. Resistance to these three isolates was not associated with awn type, esterase 1, and esterase 5. Selection for resistance to WRS102 and WRS858 would be more effective than selection for resistance to WRS857 in a conventional breeding program. Key words: Barley, Hordeum vulgare, net blotch, Pyrenophora teres, haploids

scholarly journals Proteinaceous Metabolites from Pyrenophora teres Contribute to Symptom Development of Barley Net Blotch

2007 ◽  
Vol 97 (8) ◽  
pp. 907-915 ◽  
Author(s):  
Abolfazl Sarpeleh ◽  
Hugh Wallwork ◽  
David E. A. Catcheside ◽  
Max E. Tate ◽  
Amanda J. Able
Keyword(s):  
Low Molecular Weight ◽  
Pyrenophora Teres ◽  
Susceptible Cultivar ◽  
Net Blotch ◽  
Symptom Development ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Low Molecular Weight Compounds ◽  
Necrotic Spots ◽  
Barley Net Blotch

Pyrenophora teres, the causal agent of net blotch of barley (Hordeum vulgare L.), induces a combination of necrosis and extensive chlorosis in susceptible barley cultivars. Cell-free filtrates from both net and spot forms of P. teres; P. teres f. sp. teres, and P. teres f. sp. maculata were found to contain phytotoxic low molecular weight compounds (LMWCs) and proteinaceous metabolites which appear to be responsible for different components of the symptoms induced by the two forms of the pathogen in a susceptible cultivar of barley (cv. Sloop). Proteins induced only brown necrotic spots or lesions similar to those induced by the pathogens 72 h after inoculation. In contrast, LMWCs induced general chlorosis seen 240 h after inoculation but not the localized necrosis. Neither hydrolyzed or heat- or protease-treated proteinaceous metabolites induced the symptoms. This is the first report of the involvement of proteins produced by P. teres in symptom development during net blotch disease of barley.

Kernel colour varies with cultivars and environments in barley

1998 ◽  
Vol 78 (2) ◽  
pp. 217-222 ◽  
Author(s):  
M. J. Edney ◽  
T. M. Choo ◽  
D. Kong ◽  
T. Ferguson ◽  
K. M. Ho ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Key Words ◽  
Western Canada ◽  
Net Blotch ◽  
Hordeum Vulgare L ◽  
Eastern Canada ◽  
Key Words Barley

Kernel colour is an important marketing trait for both malting and feed barleys. Therefore a study was initiated to investigate the kernel colour of 75 Canadian barley (Hordeum vulgare L.) cultivars at three locations (Charlottetown, Ottawa and Bentley) across Canada in 1991 and 1992. Kernel colour was measured by an Instrumar Colormet Spectrocolorimeter. Kernel colour was found to be brighter at the two locations in eastern Canada (Charlottetown and Ottawa) than at the location in western Canada (Bentley). Two-row cultivars on average were more discoloured than six-row cultivars; eastern two-row were more discoloured than western two-row. Covered barleys were less discoloured than hulless barleys in five of the six environments, but covered barleys at Bentley in 1992 were more discoloured than hulless barleys. Kernel discolouration appeared to be associated with susceptibility to net blotch for six-row cultivars. More studies are needed on kernel discolouration of barley. Key words: Barley, Hordeum vulgare, kernel colour

AAC Vitality barley

2016 ◽  
Vol 96 (3) ◽  
pp. 367-370
Author(s):  
Thin Meiw Choo ◽  
Allen G. Xue ◽  
Richard A. Martin
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Spot Blotch ◽  
Research Centre ◽  
Seed Color ◽  
Net Blotch ◽  
Good Resistance ◽  
Hordeum Vulgare L ◽  
Moderately Resistant

AAC Vitality is a six-row spring feed barley (Hordeum vulgare L.) cultivar developed by the Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada. AAC Vitality had high grain yield, good resistance to lodging, and good resistance to straw break. It was late in heading and maturity. Its seed color was bright. AAC Vitality was moderately resistant to net blotch and spot blotch. AAC Vitality performs well in Ontario.

scholarly journals Diallel analysis of scald and net blotch resistance in barley (Hordeum vulgare L.)

2019 ◽  
Vol 11 (6) ◽  
pp. 164-172
Author(s):  
Jalata Zerihun ◽  
Mekbib Firew ◽  
Lakew Berhane ◽  
Ahmed Seid
Keyword(s):  
Hordeum Vulgare ◽  
Diallel Analysis ◽  
Net Blotch ◽  
Hordeum Vulgare L

NEW TYPES OF VIRULENCE IN PYRENOPHORA TERES IN CANADA

1974 ◽  
Vol 54 (4) ◽  
pp. 731-734 ◽  
Author(s):  
A. TEKAUZ ◽  
J. T. MILLS
Keyword(s):  
Hordeum Vulgare ◽  
Spot Blotch ◽  
Cochliobolus Sativus ◽  
Pyrenophora Teres ◽  
Hordeum Vulgare L ◽  
Moderately Resistant ◽  
Hybrid Lines ◽  
Spot Type

Isolates of Pyrenophora teres (Died.) Drechsl. causing either net- or spot-type symptoms on barley (Hordeum vulgare L.) were collected in 1973 from fields near Winnipeg, Manitoba. Spot-type symptoms were similar to those of spot blotch incited by Cochliobolus sativus (Ito and Kurib.) Drechsl. ex Dastur. The cultivars Herta and Fergus, previously reported to be moderately resistant, were susceptible to both types of isolates. These two cultivars presently account for virtually all of the two-rowed barley and about half of the total barley acreage in Manitoba. The resistant hybrid lines CI 5791 and BT 201 retained their resistance to the isolates which produced net-type symptoms but were less resistant to those producing the spot type.

scholarly journals Profile of the in vitro secretome of the barley net blotch fungus, Pyrenophora teres f. teres

2020 ◽  
Vol 109 ◽  
pp. 101451 ◽  
Author(s):  
M. Jordi Muria-Gonzalez ◽  
Katherine G. Zulak ◽  
Eef Allegaert ◽  
Richard P. Oliver ◽  
Simon R. Ellwood
Keyword(s):  
Pyrenophora Teres ◽  
Net Blotch ◽  
Barley Net Blotch

scholarly journals Mapping and validation of the genes for resistance to Pyrenophora teres f. teres in barley (Hordeum vulgare L.)

2003 ◽  
Vol 54 (12) ◽  
pp. 1369 ◽  
Author(s):  
M. Cakir ◽  
S. Gupta ◽  
G. J. Platz ◽  
G. A. Ablett ◽  
R. Loughman ◽  
...  
Keyword(s):  
Natural Infection ◽  
Adult Plant ◽  
Research Station ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Hordeum Vulgare L ◽  
Breeding Programs ◽  
Barley Breeding ◽  
Software Packages ◽  
Selection Of

Identification and deployment of disease resistance genes are key objectives of Australian barley breeding programs. Two doubled haploid (DH) populations derived from Tallon × Kaputar (TK) and VB9524 × ND11231 (VN) crosses were used to identify markers for net type net blotch (NTNB) (Pyrenophora teres f. teres). The maps included 263 and 250 markers for TK and VN populations, respectively. The TK population was screened with 5 pathotypes and the VN population with 1 pathotype of NTNB as seedlings in the glasshouse. In addition, the TK population was subjected to natural infection in the field at Hermitage Research Station, Qld. Analyses of the markers were performed using the software packages MapManager and Qgene. One region on chromosome 6H was strongly associated with resistance to NTNB in both populations (R2 = 83% for TK and 66% for VN). In the TK population, 2 more quantitative trait loci (QTLs) were identified on chromosomes 2H and 3H, with R2 values of 30% and 31%, respectively. These associations were consistent over all pathotypes studied during the seedling stage. The same QTL on chromosome 6H was also found to be highly significantly associated (R2 = 65%) with the adult plant (field) response in the TK population. There are several very closely linked markers showing strong associations in these regions. Association of the 4 markers on chromosome 6H QTL with resistance to the NTNB has been validated in 2 other DH populations derived from barley crosses Pompadour × Stirling and WPG8412 × Stirling. These markers present an opportunity for marker assisted selection of lines resistant to NTNB in barley breeding programs.

Sign in / Sign up

Export Citation Format

Share Document