Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions
Wheat (Triticum aestivum L.) is frequently affected by Septoria nodorum blotch (SNB), a fungal disease that significantly reduces wheat yields. In this study, two recombinant inbred line (RIL) populations, developed from crosses involving two elite CIMMYT breeding lines (WUYA and KATH) and a common...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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BMC
2025
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/178355 |
| _version_ | 1855520994803843072 |
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| author | Li, Cong He, Xinyao Ma, Jian Singh, Pawan |
| author_browse | He, Xinyao Li, Cong Ma, Jian Singh, Pawan |
| author_facet | Li, Cong He, Xinyao Ma, Jian Singh, Pawan |
| author_sort | Li, Cong |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Wheat (Triticum aestivum L.) is frequently affected by Septoria nodorum blotch (SNB), a fungal disease that significantly reduces wheat yields. In this study, two recombinant inbred line (RIL) populations, developed from crosses involving two elite CIMMYT breeding lines (WUYA and KATH) and a common susceptible male parent (CIANO T79), were used to detect quantitative trait loci (QTL) associated with SNB resistance. High-density genetic maps were constructed for these RIL populations by incorporating presence/absence variation (PAV) markers using the DArTseq genotyping platform. Three major and stable QTL linked to SNB resistance were identified on chromosomes 2A, 4B, and 5B. Among these, QSnb.cim-2A accounted for 22.16%–28.74% and 17.62%–19.71% of the phenotypic variation in the WUYA/CIANO T79 and KATH/CIANO T79 populations, respectively, and it was also validated in the CASCABEL/CIANO T79 RIL population. The remaining two QTL, QSnb.cim-4B and QSnb.cim-5B, were found to be associated with Rht-B1b and tsn1, respectively. The combined effect of these three QTL significantly improved SNB resistance while also reducing plant height, indicating their promising utilization in wheat breeding programs. |
| format | Journal Article |
| id | CGSpace178355 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | BMC |
| publisherStr | BMC |
| record_format | dspace |
| spelling | CGSpace1783552025-11-28T02:04:52Z Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions Li, Cong He, Xinyao Ma, Jian Singh, Pawan soft wheat leptosphaeria nodorum quantitative trait loci mapping disease resistance Wheat (Triticum aestivum L.) is frequently affected by Septoria nodorum blotch (SNB), a fungal disease that significantly reduces wheat yields. In this study, two recombinant inbred line (RIL) populations, developed from crosses involving two elite CIMMYT breeding lines (WUYA and KATH) and a common susceptible male parent (CIANO T79), were used to detect quantitative trait loci (QTL) associated with SNB resistance. High-density genetic maps were constructed for these RIL populations by incorporating presence/absence variation (PAV) markers using the DArTseq genotyping platform. Three major and stable QTL linked to SNB resistance were identified on chromosomes 2A, 4B, and 5B. Among these, QSnb.cim-2A accounted for 22.16%–28.74% and 17.62%–19.71% of the phenotypic variation in the WUYA/CIANO T79 and KATH/CIANO T79 populations, respectively, and it was also validated in the CASCABEL/CIANO T79 RIL population. The remaining two QTL, QSnb.cim-4B and QSnb.cim-5B, were found to be associated with Rht-B1b and tsn1, respectively. The combined effect of these three QTL significantly improved SNB resistance while also reducing plant height, indicating their promising utilization in wheat breeding programs. 2025-09-24 2025-11-27T20:31:08Z 2025-11-27T20:31:08Z Journal Article https://hdl.handle.net/10568/178355 en Open Access application/pdf BMC Li, C., He, X., Ma, J., & Singh, P. K. (2025). Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions. Phytopathology Research, 7(1), 82. https://doi.org/10.1186/s42483-025-00371-z |
| spellingShingle | soft wheat leptosphaeria nodorum quantitative trait loci mapping disease resistance Li, Cong He, Xinyao Ma, Jian Singh, Pawan Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title | Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title_full | Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title_fullStr | Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title_full_unstemmed | Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title_short | Identification and validation of a major QTL on chromosome 2A for wheat-Parastagonospora nodorum interactions |
| title_sort | identification and validation of a major qtl on chromosome 2a for wheat parastagonospora nodorum interactions |
| topic | soft wheat leptosphaeria nodorum quantitative trait loci mapping disease resistance |
| url | https://hdl.handle.net/10568/178355 |
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