Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma
Prevalence of tan spot of wheat caused by the fungus Pyrenophora tritici-repentis has become more prevalent in Oklahoma as no-till cultivation in wheat has increased. Hence, developing wheat varieties resistant to tan spot has been emphasized, and selecting pathogen isolates to screen for resistance...
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| Format: | Article |
| Language: | English |
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Hanrimwon Publishing Company
2021-08-01
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| Series: | The Plant Pathology Journal |
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| Online Access: | http://www.ppjonline.org/upload/pdf/PPJ-OA-01-2021-0012.pdf |
| _version_ | 1798039094581788672 |
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| author | Kazi A. Kader Robert M. Hunger Mark E. Payton |
| author_facet | Kazi A. Kader Robert M. Hunger Mark E. Payton |
| author_sort | Kazi A. Kader |
| collection | DOAJ |
| description | Prevalence of tan spot of wheat caused by the fungus Pyrenophora tritici-repentis has become more prevalent in Oklahoma as no-till cultivation in wheat has increased. Hence, developing wheat varieties resistant to tan spot has been emphasized, and selecting pathogen isolates to screen for resistance to this disease is critical. Twelve isolates of P. tritici-repentis were used to inoculate 11 wheat cultivars in a greenhouse study in split-plot experiments. Virulence of isolates and cultivar resistance were measured in percent leaf area infection for all possible isolate x cultivar interactions. Isolates differed significantly (P < 0.01) in virulence on wheat cultivars, and cultivars differed significantly in disease reaction to isolates. Increased virulence of isolates detected increased variability in cultivar response (percent leaf area infection) (r = 0.56, P < 0.05) while increased susceptibility in cultivars detected increased variance in virulence of the isolates (r = 0.76, P < 0.01). A significant isolate × cultivar interaction indicated specificity between isolates and cultivars, however, cluster analysis indicated low to moderate physiological specialization. Similarity in wheat cultivars in response to pathogen isolates also was determined by cluster analysis. The use of diverse isolates of the fungus would facilitate evaluation of resistance in wheat cultivars to tan spot. |
| first_indexed | 2024-04-11T21:49:10Z |
| format | Article |
| id | doaj.art-1366e2f721a446e38e1b843114b674bd |
| institution | Directory Open Access Journal |
| issn | 1598-2254 2093-9280 |
| language | English |
| last_indexed | 2024-04-11T21:49:10Z |
| publishDate | 2021-08-01 |
| publisher | Hanrimwon Publishing Company |
| record_format | Article |
| series | The Plant Pathology Journal |
| spelling | doaj.art-1366e2f721a446e38e1b843114b674bd2022-12-22T04:01:17ZengHanrimwon Publishing CompanyThe Plant Pathology Journal1598-22542093-92802021-08-0137433934610.5423/PPJ.OA.01.2021.00122258Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in OklahomaKazi A. Kader0Robert M. Hunger1Mark E. Payton2 Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078, USA Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078, USA Department of Statistics, Oklahoma State University, Stillwater, OK 74078, USAPrevalence of tan spot of wheat caused by the fungus Pyrenophora tritici-repentis has become more prevalent in Oklahoma as no-till cultivation in wheat has increased. Hence, developing wheat varieties resistant to tan spot has been emphasized, and selecting pathogen isolates to screen for resistance to this disease is critical. Twelve isolates of P. tritici-repentis were used to inoculate 11 wheat cultivars in a greenhouse study in split-plot experiments. Virulence of isolates and cultivar resistance were measured in percent leaf area infection for all possible isolate x cultivar interactions. Isolates differed significantly (P < 0.01) in virulence on wheat cultivars, and cultivars differed significantly in disease reaction to isolates. Increased virulence of isolates detected increased variability in cultivar response (percent leaf area infection) (r = 0.56, P < 0.05) while increased susceptibility in cultivars detected increased variance in virulence of the isolates (r = 0.76, P < 0.01). A significant isolate × cultivar interaction indicated specificity between isolates and cultivars, however, cluster analysis indicated low to moderate physiological specialization. Similarity in wheat cultivars in response to pathogen isolates also was determined by cluster analysis. The use of diverse isolates of the fungus would facilitate evaluation of resistance in wheat cultivars to tan spot.http://www.ppjonline.org/upload/pdf/PPJ-OA-01-2021-0012.pdfcultivar responseisolate virulence tan spotwheat |
| spellingShingle | Kazi A. Kader Robert M. Hunger Mark E. Payton Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma The Plant Pathology Journal cultivar response isolate virulence tan spot wheat |
| title | Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma |
| title_full | Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma |
| title_fullStr | Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma |
| title_full_unstemmed | Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma |
| title_short | Isolate Virulence and Cultivar Response in the Winter Wheat: (Tan Spot) Pathosystem in Oklahoma |
| title_sort | isolate virulence and cultivar response in the winter wheat tan spot pathosystem in oklahoma |
| topic | cultivar response isolate virulence tan spot wheat |
| url | http://www.ppjonline.org/upload/pdf/PPJ-OA-01-2021-0012.pdf |
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