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<p>Stripe rust (yellow rust), caused by <i>Puccinia striiformis</i> f. sp. <i>tritici</i> (<i>Pst</i>), is a serious disease of wheat worldwide, including India. The deployment of resistant cultivars is considered the most cost-effective and eco-friendly approach to manage this disease. In the present study, 54 wheat varieties/genotypes were screened for seedling resistance to stripe rust against 10 <i>Pst</i> pathotypes, evaluated for adult plant resistance (APR), and analyzed genetically using markers closely linked to <i>Yr</i> genes. In the seedling resistance tests, the wheat variety PBW725 was found resistant to all tested <i>Pst</i> pathotypes. Variety WH1105 exhibited resistance to pathotypes 46S119, 110S84, K, 111S68, and 7S0; HD2967 was resistant to 78S84, 110S84, 111S68, and 7S0; and HD3086 showed resistance to 110S84, 111S68, and 7S0. The adult plant resistance response of PBW725 and seven other genotypes was highly promising against stripe rust, while five genotypes exhibited moderate resistance with stripe rust severity levels of ≤ 20%. The genotypic differences among varieties and genotypes were distinguished using <i>Yr</i> gene-linked markers such as STS9/10, IAG95-STS-Sr31/Yr9, Xpsp3000-1B, XGWM11-Yr15/Yr24, VENTRIUP-Yr17, Xbarc187-Yr24, and Xwmc44-Yr29/Lr46. The seedling and adult plant resistance responses observed in some of the screened genotypes could be crucial for breeding programs focused on enhancing wheat resistance to stripe rust. These findings are important for developing stripe rust-resistant wheat cultivars by pyramiding effective all-stage resistance (ASR) and adult plant resistance (APR) <i>Yr</i> genes.</p>

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Genetic and phenotypic evaluation of wheat genotypes for stripe rust resistance

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Muhammad Rafi Bawari,
  • Rajender Singh Beniwal,
  • Om Prakash Gangwar,
  • Pramod Prasad,
  • Ajit Singh

摘要

Stripe rust (yellow rust), caused by Puccinia striiformis f. sp. tritici (Pst), is a serious disease of wheat worldwide, including India. The deployment of resistant cultivars is considered the most cost-effective and eco-friendly approach to manage this disease. In the present study, 54 wheat varieties/genotypes were screened for seedling resistance to stripe rust against 10 Pst pathotypes, evaluated for adult plant resistance (APR), and analyzed genetically using markers closely linked to Yr genes. In the seedling resistance tests, the wheat variety PBW725 was found resistant to all tested Pst pathotypes. Variety WH1105 exhibited resistance to pathotypes 46S119, 110S84, K, 111S68, and 7S0; HD2967 was resistant to 78S84, 110S84, 111S68, and 7S0; and HD3086 showed resistance to 110S84, 111S68, and 7S0. The adult plant resistance response of PBW725 and seven other genotypes was highly promising against stripe rust, while five genotypes exhibited moderate resistance with stripe rust severity levels of ≤ 20%. The genotypic differences among varieties and genotypes were distinguished using Yr gene-linked markers such as STS9/10, IAG95-STS-Sr31/Yr9, Xpsp3000-1B, XGWM11-Yr15/Yr24, VENTRIUP-Yr17, Xbarc187-Yr24, and Xwmc44-Yr29/Lr46. The seedling and adult plant resistance responses observed in some of the screened genotypes could be crucial for breeding programs focused on enhancing wheat resistance to stripe rust. These findings are important for developing stripe rust-resistant wheat cultivars by pyramiding effective all-stage resistance (ASR) and adult plant resistance (APR) Yr genes.