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Field response and molecular screening of European wheat germplasm against powdery mildew at the Himalayan region of Pakistan

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Abstract

Wheat powdery mildew possesses a significant threat to wheat crops not only on a global scale but also in the northern region of Pakistan. Recognizing the need for effective measures, the exploration and utilization of exotic germplasm take on critical importance. To address this, a series of trials were made to investigate the response of 30 European (EU) lines, in addition to the local checks (Siran, Atta-Habib (AH) and Ghanimat-e-IBGE) against wheat powdery mildew at the Himalayan region of Pakistan. The study involved field testing from 2018 to 2022 across multiple locations, resulting in 38 different environments (location × year). In addition to field evaluations, molecular genotyping was also performed. The disease was absent on the tested lines during 2018, 2019, and 2020 whereas it ranged from 0 to 100% at Chitral location during 2021, where 100% was observed only for one EU wheat line “Matrix.” The disease prevailed only at Gilgit location (0–60% for EU wheat line “F236”) and at Nagar location (0–10% for EU wheat lines Substance and Nelson) during the disease season of 2022. Most of the EU wheat lines showed very low ACI values, due to an overall low disease pressure. Matrix showed the maximum ACI (1.54) followed by Ritter (1.25) and Bli_autrichion (0.87), whereas the minimum (0.1) was for Substance, JB_Asano, and KWS_Loft followed by Canon (0.19), all exhibiting partial resistance. The molecular marker-based screening revealed that Pm38 was the most prevalent and detected in 100% of wheat lines followed by Pm39 (60%) and Pm8 (30%). Six wheat lines (20%) possessed all three Pm genes (Pm8, Pm38, and Pm39) concurrently. The variability observed in this study can be utilized in future breeding efforts aimed at developing resistant wheat varieties.

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Acknowledgements

We are thankful to the research scientists and field working staff at IBGE and Hazara University Mansehra, particularly Mr. Shahzad Ahmad and Mr. Aizaz Arshad. Special thanks to European colleagues who sent their material for testing in Pakistan.

Funding

The work received financial support from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 773311 (RustWatch) and the CIMMYT funding through Agriculture Innovation Programme (AIP GRANT number PIO grant # AID-BFS-G-11-00002 and ICC W0266.02).

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AI, ZUR, MRK, AMK, SUK, MA, JI, MUR, MA, MQ, IA, ZHF, MH, IH, JA, and SA conducted the field trial. AI conducted molecular genotyping. AI, ZUR, MRK, and SA analyzed the data. JI, MUR, MI, MQ, IA, ZHF, MH, IH, and JA provided the technical support for the field trials at multi-locations. AI wrote the manuscript. ZUR, MRK, and SA revised the manuscript. SA provided funding resources for the study. SA designed the study.

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Correspondence to Aamir Iqbal or Sajid Ali.

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This is an observational study on plants. The Institute of Biotechnology and Genetic Engineering, The University of Agriculture, Peshawar, Pakistan has evaluated the ethical aspects in Board of Studies and did not consider necessary to get ethical approval.

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Iqbal, A., Rehman, Z.U., Khan, M.R. et al. Field response and molecular screening of European wheat germplasm against powdery mildew at the Himalayan region of Pakistan. J Appl Genetics 64, 667–678 (2023). https://doi.org/10.1007/s13353-023-00789-1

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