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<p>Stripe rust of wheat, caused by <i>Puccinia striiformis</i> f. sp. <i>tritici</i> (<i>Pst</i>), is a macrocyclic, heteroecious fungus that produces wind-borne urediniospores capable of infecting wheat fields thousands of kilometers away. Understanding the frequency and distribution of <i>Pst</i> pathotypes is essential for effective disease management. In this study, stripe rust-infected wheat leaves were collected from seven Indian states and analyzed at the ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla. A total of 42 samples from the 2019–2020 season and 30 samples from the 2020–2021 season were examined. Pathotype analysis revealed that 238S119 was the most frequent, followed by 46S119 and 110S119. Pathotypes 6S0 and 7S0 were found at low frequencies during the 2019–2020 season but were not observed in 2020–2021. Virulence frequency analysis showed that all identified pathotypes were avirulent to the <i>Yr5</i> and <i>Yr10</i> genes, while demonstrating virulence against thirteen other <i>Yr</i> genes (<i>Yr1</i>, <i>Yr7</i>, <i>Yr6</i>, <i>Yr3</i>, <i>Yr8</i>, <i>Yr9</i>, <i>Yr2</i>, <i>YrSd</i>, <i>Yr4</i>, <i>Yr2</i>, <i>YrSu</i>, and <i>Yr9</i>). These findings are crucial for ensuring sustainable wheat production in India and beyond by facilitating more effective management of wheat stripe rust.</p>

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Virulence analysis and geographical distribution of Puccinia striiformis f. sp. tritici pathotypes in North Western plains zone of India (2019–2021)

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Muhammad Rafi Bawari,
  • Ajit Singh,
  • Rajender Singh Beniwal,
  • Keshav Saharan,
  • Om Prakash Gangwar,
  • Pramod Prasad,
  • Subodh Kumar,
  • Subhash Chander Bhardwaj

摘要

Stripe rust of wheat, caused by Puccinia striiformis f. sp. tritici (Pst), is a macrocyclic, heteroecious fungus that produces wind-borne urediniospores capable of infecting wheat fields thousands of kilometers away. Understanding the frequency and distribution of Pst pathotypes is essential for effective disease management. In this study, stripe rust-infected wheat leaves were collected from seven Indian states and analyzed at the ICAR-Indian Institute of Wheat and Barley Research, Regional Station, Shimla. A total of 42 samples from the 2019–2020 season and 30 samples from the 2020–2021 season were examined. Pathotype analysis revealed that 238S119 was the most frequent, followed by 46S119 and 110S119. Pathotypes 6S0 and 7S0 were found at low frequencies during the 2019–2020 season but were not observed in 2020–2021. Virulence frequency analysis showed that all identified pathotypes were avirulent to the Yr5 and Yr10 genes, while demonstrating virulence against thirteen other Yr genes (Yr1, Yr7, Yr6, Yr3, Yr8, Yr9, Yr2, YrSd, Yr4, Yr2, YrSu, and Yr9). These findings are crucial for ensuring sustainable wheat production in India and beyond by facilitating more effective management of wheat stripe rust.