Genetics of seedling and adult plant resistance to net blotch (Pyrenophora teres f. teres) and spot blotch (Cochliobolus sativus) in barley

1996 ◽  
Vol 92 (5) ◽  
pp. 552-558 ◽  
Author(s):  
B. J. Steffenson ◽  
P. M. Hayes ◽  
A. Kleinhofs
Keyword(s):  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Spot Blotch ◽  
Cochliobolus Sativus ◽  
Adult Plant ◽  
Pyrenophora Teres ◽  
Net Blotch

scholarly journals Responses of Barley Cultivars and Lines to Isolates of Pyrenophora teres

Plant Disease ◽  
1998 ◽  
Vol 82 (3) ◽  
pp. 316-321 ◽  
Author(s):  
A. Douiyssi ◽  
D. C. Rasmusson ◽  
A. P. Roelfs
Keyword(s):  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Resistance Breeding ◽  
Adult Plant ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Seedling Resistance ◽  
Barley Cultivars ◽  
Pathogenic Variability ◽  
High Level

Net blotch, caused by Pyrenophora teres, is among the most damaging foliar diseases of barley worldwide. A knowledge of the reaction of local cultivars, putative resistant lines, and variability in the net blotch pathogen is necessary to develop a successful resistance breeding program. Disease responses of 38 barley lines to 15 P. teres isolates were studied at the seedling and adult plant stages in the glasshouse, and field responses to net blotch were evaluated at three Moroccan locations. No tested barley was resistant to all isolates, and resistance was apparently of the specific type. Pathogenic variability was great, as none of the 15 isolates were identical. For each isolate tested, a specific high level of resistance was found in one or more host lines. Seedling and adults plants often differed in response to the same isolate. Adult plant resistance was commonly observed in response to isolate I-1, and seedling resistance was more common to isolate I-14. Adult plant resistance of nine lines was undetected in seedling evaluations using isolate I-1. The seedling glasshouse and field responses of the barley lines varied considerably, limiting the value of seedling testing for resistance. Field reactions of resistant and moderately resistant were consistent across the three locations for the lines Heartland, Minn 7, CI 2333, and CI 2549. The variability observed in P. teres and failure to find lines with resistance to all isolates suggests that breeding for resistance should emphasize pyramiding of resistance genes.

scholarly journals A comparison of the genetics of seedling and adult plant resistance to the spot form of net blotch (Pyrenophora teres f. maculata)

2003 ◽  
Vol 54 (12) ◽  
pp. 1387 ◽  
Author(s):  
K. J. Williams ◽  
G. J. Platz ◽  
A. R. Barr ◽  
J. Cheong ◽  
K. Willsmore ◽  
...  
Keyword(s):  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Nematode Resistance ◽  
Cyst Nematode ◽  
Field Resistance ◽  
Adult Plant ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Seedling Resistance ◽  
Probable Effect

Spot form of net blotch (SFNB) (Pyrenophora teres f. maculata) is an economically damaging foliar disease of barley in many of the world's cereal-growing areas. The gene Rpt4 that confers seedling resistance to SFNB has been mapped on the long arm of chromosome 7H, but no genes for adult plant resistance (APR) have been identified. A lack of field resistance to SFNB in breeders' lines selected for Rpt4 led us to investigate the genetics of APR to this disease. Five doubled-haploid populations were phenotyped for seedling and adult plant reaction. Markers linked to Rpt4 explained a large part of the seedling variation, but little of the APR. In 2 mapped populations, major quantitative trait loci (QTLs) for APR distal to Rpt4 on chromosome 7H were identified. QTLs contributing to APR on chromosomes 4H or 5H were also identified in each population. Association of the 5H QTL with a gene for cereal cyst nematode resistance and the probable effect of this linkage on the historical development of cultivars with adult plant resistance to SFNB is discussed.

Reaction of Turkish barley accessions to Canadian barley pathogens

1996 ◽  
Vol 76 (4) ◽  
pp. 927-931 ◽  
Author(s):  
W. G. Legge ◽  
D. R. Metcalfe ◽  
A. W. Chiko ◽  
J. W. Martens ◽  
A. Tekauz
Keyword(s):  
Genetic Resistance ◽  
Spot Blotch ◽  
Cochliobolus Sativus ◽  
Barley Stripe Mosaic Virus ◽  
Puccinia Graminis ◽  
Pyrenophora Teres ◽  
Net Blotch ◽  
Good Source ◽  
Leaf Blotch ◽  
Disease Reaction

Recent changes in the virulence patterns of Canadian barley pathogens have necessitated the search for new sources of genetic resistance in barley. Evaluation of 176 Turkish barley accessions for disease reaction to barley pathogens prevalent in Canada indicated that this germplasm is a good source of resistance to Septoria passerinii, Rhynchosporium secalis and the spot-form of Pyrenophora teres, but not to Cochliobolus sativus (spot blotch phase), Puccinia graminis tritici, Ustilago nuda or barley stripe mosaic virus. A small number of accessions with resistance to the net-form of P. teres were identified. Key words:Hordeum vulgare, barley, disease resistance, net blotch, scald, speckled leaf blotch

Mapping of adult plant resistance to net form of net blotch in three Australian barley populations

2007 ◽  
Vol 58 (12) ◽  
pp. 1191 ◽  
Author(s):  
A. Lehmensiek ◽  
G. J. Platz ◽  
E. Mace ◽  
D. Poulsen ◽  
M. W. Sutherland
Keyword(s):  
Plant Resistance ◽  
Adult Plant Resistance ◽  
International System ◽  
Field Trials ◽  
Adult Plant ◽  
Net Blotch ◽  
Resistance Qtls ◽  
Epistatic Interactions ◽  
Population Comparisons ◽  
Serious Disease

Net form of net blotch (NFNB), caused by Pyrenophora teres Drechs. f. teres Smedeg., is a serious disease problem for the barley industry in Australia and other parts of the world. Three doubled haploid barley populations, Alexis/Sloop, WI2875-1/Alexis, and Arapiles/Franklin, were used to identify genes conferring adult plant resistance to NFNB in field trials. Quantitative trait loci (QTLs) identified were specific for adult plant resistance because seedlings of the parental lines were susceptible to the NFNB isolates used in this study. QTLs were identified on chromosomes 2H, 3H, 4H, and 7H in both the Alexis/Sloop and WI2875-1/Alexis populations and on chromosomes 1H, 2H, and 7H in the Arapiles/Franklin population. Using QTLNetwork, epistatic interactions were identified between loci on chromosomes 3H and 6H in the Alexis/Sloop population, between 2H and 4H in the WI2875-1/Alexis population, and between 5H and 7H in the Arapiles/Franklin population. Comparisons with earlier studies of NFNB resistance indicate the pathotype-dependent nature of many resistance QTLs and the importance of establishing an international system of pathotype nomenclature and differential testing.

cDNA-AFLP Analysis Reveals Differential Gene Expression in Wheat Adult- Plant Resistance to Stripe Rust

2010 ◽  
Vol 36 (3) ◽  
pp. 401-409 ◽  
Author(s):  
Gang ZHANG ◽  
Yan-Ling DONG ◽  
Ning XIA ◽  
Yi ZHANG ◽  
Xiao-Jie WANG ◽  
...  
Keyword(s):  
Gene Expression ◽  
Differential Gene Expression ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Adult Plant ◽  
Aflp Analysis ◽  
Differential Gene
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