Association mapping of resistance to tan spot in the Global Durum Panel
Tan spot, caused by the necrotrophic fungal pathogen Pyrenophora tritici-repentis (Ptr), is an important disease of durum and common wheat worldwide. Compared to common wheat, less is known about the genetics and molecular basis of tan spot resistance in durum wheat. We evaluated 510 durum lines fro...
| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
American Phytopathological Society
2023
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/132254 |
| _version_ | 1855539772352626688 |
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| author | Szabo-Hever, Agnes Singh, Gurminder Peters Haugrud, Amanda Running, Katherine Seneviratne, Sudeshi Zhang, Zengcui Shi, Gongjun Bassi, Filippo Maccaferri, Marco Cattivelli, Luigi Tuberosa, Roberto Friesen, Timothy L Liu, Zhaohui Xu, Steven Faris, Justin |
| author_browse | Bassi, Filippo Cattivelli, Luigi Faris, Justin Friesen, Timothy L Liu, Zhaohui Maccaferri, Marco Peters Haugrud, Amanda Running, Katherine Seneviratne, Sudeshi Shi, Gongjun Singh, Gurminder Szabo-Hever, Agnes Tuberosa, Roberto Xu, Steven Zhang, Zengcui |
| author_facet | Szabo-Hever, Agnes Singh, Gurminder Peters Haugrud, Amanda Running, Katherine Seneviratne, Sudeshi Zhang, Zengcui Shi, Gongjun Bassi, Filippo Maccaferri, Marco Cattivelli, Luigi Tuberosa, Roberto Friesen, Timothy L Liu, Zhaohui Xu, Steven Faris, Justin |
| author_sort | Szabo-Hever, Agnes |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Tan spot, caused by the necrotrophic fungal pathogen Pyrenophora tritici-repentis (Ptr), is an important disease of durum and common wheat worldwide. Compared to common wheat, less is known about the genetics and molecular basis of tan spot resistance in durum wheat. We evaluated 510 durum lines from the Global Durum wheat Panel (GDP) for sensitivity to the necrotrophic effectors (NEs) Ptr ToxA and Ptr ToxB, and for reaction to Ptr isolates representing races 1–5. Overall, susceptible durum lines were most prevalent in South Asia, the Middle East, and North Africa. Genome-wide association analysis showed the resistance locus Tsr7 was significantly associated with tan spot caused by races 2 and 3, but not races 1, 4, or 5. The NE sensitivity genes Tsc1 and Tsc2 were associated with susceptibility to Ptr ToxC- and Ptr ToxB-producing isolates, respectively, but Tsn1 was not associated with tan spot caused by Ptr ToxA-producing isolates, which further validates that the Tsn1-Ptr ToxA interaction does not play a significant role in tan spot development in durum. A unique locus on chromosome arm 2AS was associated with tan spot caused by race 4, a race once considered avirulent. A novel trait characterized by expanding chlorosis leading to increased disease severity caused by the Ptr ToxB-producing race 5 isolate DW5 was identified, and this trait was governed by a locus on chromosome 5B. We recommend that durum breeders select resistance alleles at the Tsr7, Tsc1, Tsc2, and the chromosome 2AS loci to obtain broad resistance to tan spot. |
| format | Journal Article |
| id | CGSpace132254 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | American Phytopathological Society |
| publisherStr | American Phytopathological Society |
| record_format | dspace |
| spelling | CGSpace1322542026-01-14T02:36:04Z Association mapping of resistance to tan spot in the Global Durum Panel Szabo-Hever, Agnes Singh, Gurminder Peters Haugrud, Amanda Running, Katherine Seneviratne, Sudeshi Zhang, Zengcui Shi, Gongjun Bassi, Filippo Maccaferri, Marco Cattivelli, Luigi Tuberosa, Roberto Friesen, Timothy L Liu, Zhaohui Xu, Steven Faris, Justin genetics disease resistance fungal pathogens host parasite interactions Tan spot, caused by the necrotrophic fungal pathogen Pyrenophora tritici-repentis (Ptr), is an important disease of durum and common wheat worldwide. Compared to common wheat, less is known about the genetics and molecular basis of tan spot resistance in durum wheat. We evaluated 510 durum lines from the Global Durum wheat Panel (GDP) for sensitivity to the necrotrophic effectors (NEs) Ptr ToxA and Ptr ToxB, and for reaction to Ptr isolates representing races 1–5. Overall, susceptible durum lines were most prevalent in South Asia, the Middle East, and North Africa. Genome-wide association analysis showed the resistance locus Tsr7 was significantly associated with tan spot caused by races 2 and 3, but not races 1, 4, or 5. The NE sensitivity genes Tsc1 and Tsc2 were associated with susceptibility to Ptr ToxC- and Ptr ToxB-producing isolates, respectively, but Tsn1 was not associated with tan spot caused by Ptr ToxA-producing isolates, which further validates that the Tsn1-Ptr ToxA interaction does not play a significant role in tan spot development in durum. A unique locus on chromosome arm 2AS was associated with tan spot caused by race 4, a race once considered avirulent. A novel trait characterized by expanding chlorosis leading to increased disease severity caused by the Ptr ToxB-producing race 5 isolate DW5 was identified, and this trait was governed by a locus on chromosome 5B. We recommend that durum breeders select resistance alleles at the Tsr7, Tsc1, Tsc2, and the chromosome 2AS loci to obtain broad resistance to tan spot. 2023-10-13T14:49:14Z 2023-10-13T14:49:14Z Journal Article https://hdl.handle.net/10568/132254 en Limited Access American Phytopathological Society Agnes Szabo-Hever, Gurminder Singh, Amanda Peters Haugrud, Katherine Running, Sudeshi Seneviratne, Zengcui Zhang, Gongjun Shi, Filippo Bassi, Marco Maccaferri, Luigi Cattivelli, Roberto Tuberosa, Timothy L Friesen, Zhaohui Liu, Steven Xu, Justin Faris. (18/5/2023). Association mapping of resistance to tan spot in the Global Durum Panel. Phytopathology. |
| spellingShingle | genetics disease resistance fungal pathogens host parasite interactions Szabo-Hever, Agnes Singh, Gurminder Peters Haugrud, Amanda Running, Katherine Seneviratne, Sudeshi Zhang, Zengcui Shi, Gongjun Bassi, Filippo Maccaferri, Marco Cattivelli, Luigi Tuberosa, Roberto Friesen, Timothy L Liu, Zhaohui Xu, Steven Faris, Justin Association mapping of resistance to tan spot in the Global Durum Panel |
| title | Association mapping of resistance to tan spot in the Global Durum Panel |
| title_full | Association mapping of resistance to tan spot in the Global Durum Panel |
| title_fullStr | Association mapping of resistance to tan spot in the Global Durum Panel |
| title_full_unstemmed | Association mapping of resistance to tan spot in the Global Durum Panel |
| title_short | Association mapping of resistance to tan spot in the Global Durum Panel |
| title_sort | association mapping of resistance to tan spot in the global durum panel |
| topic | genetics disease resistance fungal pathogens host parasite interactions |
| url | https://hdl.handle.net/10568/132254 |
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