Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat
Key message: QTL mapping identified key genomic regions associated with adult-plant resistance to tan spot, which are effective even in the presence of the sensitivity gene Tsn1, thus serving as a new genetic solution to develop disease-resistant wheat cultivars. Abstract: Improving resistance t...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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SPRINGER
2021
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/87606 |
| _version_ | 1848764929680605184 |
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| author | Dinglasan, E.G. Peressini, T. Marathamuthu, Kalai See, Pao Theen Snyman, L. Platz, G. Godwin, I. Voss-Fels, K.P. Moffat, Caroline Hickey, L.T. |
| author_facet | Dinglasan, E.G. Peressini, T. Marathamuthu, Kalai See, Pao Theen Snyman, L. Platz, G. Godwin, I. Voss-Fels, K.P. Moffat, Caroline Hickey, L.T. |
| author_sort | Dinglasan, E.G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Key message: QTL mapping identified key genomic regions associated with adult-plant resistance to tan spot, which are effective even in the presence of the sensitivity gene Tsn1, thus serving as a new genetic solution to develop disease-resistant wheat cultivars.
Abstract: Improving resistance to tan spot (Pyrenophora tritici-repentis; Ptr) in wheat by eliminating race-specific susceptibility genes is a common breeding approach worldwide. The potential to exploit variation in quantitative forms of resistance, such as adult-plant resistance (APR), offers an alternative approach that could lead to broad-spectrum protection. We previously identified wheat landraces in the Vavilov diversity panel that exhibited high levels of APR despite carrying the sensitivity gene Tsn1. In this study, we characterised the genetic control of APR by developing a recombinant inbred line population fixed for Tsn1, but segregating for the APR trait. Linkage mapping using DArTseq markers and disease response phenotypes identified a QTL associated with APR to Ptr race 1 (producing Ptr ToxA- and Ptr ToxC) on chromosome 2B (Qts.313-2B), which was consistently detected in multiple adult-plant experiments. Additional loci were also detected on chromosomes 2A, 3D, 5A, 5D, 6A, 6B and 7A at the seedling stage, and on chromosomes 1A and 5B at the adult stage. We demonstrate that Qts.313-2B can be combined with other adult-plant QTL (i.e. Qts.313-1A and Qts.313-5B) to strengthen resistance levels. The APR QTL reported in this study provide a new genetic solution to tan spot in Australia and could be deployed in wheat cultivars, even in the presence of Tsn1, to decrease production losses and reduce the application of fungicides |
| first_indexed | 2025-11-14T11:27:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-87606 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:27:10Z |
| publishDate | 2021 |
| publisher | SPRINGER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-876062022-03-03T00:57:52Z Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat Dinglasan, E.G. Peressini, T. Marathamuthu, Kalai See, Pao Theen Snyman, L. Platz, G. Godwin, I. Voss-Fels, K.P. Moffat, Caroline Hickey, L.T. Science & Technology Life Sciences & Biomedicine Agronomy Plant Sciences Genetics & Heredity Horticulture Agriculture PYRENOPHORA-TRITICI-REPENTIS QUANTITATIVE TRAIT LOCI RACE-NONSPECIFIC RESISTANCE PTR TOXB NECROTROPHIC EFFECTORS IDENTIFICATION QTL SENSITIVITY DISEASE SUSCEPTIBILITY Key message: QTL mapping identified key genomic regions associated with adult-plant resistance to tan spot, which are effective even in the presence of the sensitivity gene Tsn1, thus serving as a new genetic solution to develop disease-resistant wheat cultivars. Abstract: Improving resistance to tan spot (Pyrenophora tritici-repentis; Ptr) in wheat by eliminating race-specific susceptibility genes is a common breeding approach worldwide. The potential to exploit variation in quantitative forms of resistance, such as adult-plant resistance (APR), offers an alternative approach that could lead to broad-spectrum protection. We previously identified wheat landraces in the Vavilov diversity panel that exhibited high levels of APR despite carrying the sensitivity gene Tsn1. In this study, we characterised the genetic control of APR by developing a recombinant inbred line population fixed for Tsn1, but segregating for the APR trait. Linkage mapping using DArTseq markers and disease response phenotypes identified a QTL associated with APR to Ptr race 1 (producing Ptr ToxA- and Ptr ToxC) on chromosome 2B (Qts.313-2B), which was consistently detected in multiple adult-plant experiments. Additional loci were also detected on chromosomes 2A, 3D, 5A, 5D, 6A, 6B and 7A at the seedling stage, and on chromosomes 1A and 5B at the adult stage. We demonstrate that Qts.313-2B can be combined with other adult-plant QTL (i.e. Qts.313-1A and Qts.313-5B) to strengthen resistance levels. The APR QTL reported in this study provide a new genetic solution to tan spot in Australia and could be deployed in wheat cultivars, even in the presence of Tsn1, to decrease production losses and reduce the application of fungicides 2021 Journal Article http://hdl.handle.net/20.500.11937/87606 10.1007/s00122-021-03861-8 English SPRINGER restricted |
| spellingShingle | Science & Technology Life Sciences & Biomedicine Agronomy Plant Sciences Genetics & Heredity Horticulture Agriculture PYRENOPHORA-TRITICI-REPENTIS QUANTITATIVE TRAIT LOCI RACE-NONSPECIFIC RESISTANCE PTR TOXB NECROTROPHIC EFFECTORS IDENTIFICATION QTL SENSITIVITY DISEASE SUSCEPTIBILITY Dinglasan, E.G. Peressini, T. Marathamuthu, Kalai See, Pao Theen Snyman, L. Platz, G. Godwin, I. Voss-Fels, K.P. Moffat, Caroline Hickey, L.T. Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title | Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title_full | Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title_fullStr | Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title_full_unstemmed | Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title_short | Genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| title_sort | genetic characterization of adult-plant resistance to tan spot (syn, yellow spot) in wheat |
| topic | Science & Technology Life Sciences & Biomedicine Agronomy Plant Sciences Genetics & Heredity Horticulture Agriculture PYRENOPHORA-TRITICI-REPENTIS QUANTITATIVE TRAIT LOCI RACE-NONSPECIFIC RESISTANCE PTR TOXB NECROTROPHIC EFFECTORS IDENTIFICATION QTL SENSITIVITY DISEASE SUSCEPTIBILITY |
| url | http://hdl.handle.net/20.500.11937/87606 |