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<p>The tolerance of tomato genotypes to <i>Tobamovirus fructirugosum</i> (ToBRFV), an important pathogen affecting tomato production worldwide was evaluated. This research focuses on quantifying agronomic losses at various crop stages due to ToBRFV infections. Two genotypes, 202–110 F1 and 172–300 F1 (Yuksel), were evaluated under greenhouse conditions using sequential dilutions of the inoculum. Viral presence was confirmed by RT-PCR and disease progress was monitored using severity indices and area under the disease progress curve (AUDPC). Agronomic parameters and viral concentrations were measured. Results showed a higher tolerance in genotype 172–300 F1, which exhibited less disease severity (22.73%) 40&#xa0;days post infection (dpi) and reduced AUDPC values as compared to 202–110 F1. Infection time significantly affected yield losses; early-stage infections (45 dpi), caused 52% yield reduction whereas late-stage infections (105 dpi), caused only 9% loss. Viral load, assessed by ELISA, corroborated these results, showing significantly low concentrations in later infections. The research highlights the role of time infection and genetic resistance in mitigating ToBRFV-induced losses. The 172–300 F1 genotype showed potential in breeding programs targeting ToBRFV resistance. Early infections increase economic losses, emphasizing the importance of integrated pest management including resistant cultivars. These findings provide a framework for designing effective control measures to ensure sustainability of tomato production worldwide.</p>

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Genetic resistance to ToBRFV (Tobamovirus fructirugosum) infection at different plant stages affecting tomato (Solanum lycopersicum L.) yield

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Ubilfrido Vasquez-Gutierrez,
  • Agustín Hernández-Juárez,
  • Gustavo A. Frias-Treviño,
  • Luis A. Aguirre-Uribe,
  • Sonia N. Ramírez-Barrón

摘要

The tolerance of tomato genotypes to Tobamovirus fructirugosum (ToBRFV), an important pathogen affecting tomato production worldwide was evaluated. This research focuses on quantifying agronomic losses at various crop stages due to ToBRFV infections. Two genotypes, 202–110 F1 and 172–300 F1 (Yuksel), were evaluated under greenhouse conditions using sequential dilutions of the inoculum. Viral presence was confirmed by RT-PCR and disease progress was monitored using severity indices and area under the disease progress curve (AUDPC). Agronomic parameters and viral concentrations were measured. Results showed a higher tolerance in genotype 172–300 F1, which exhibited less disease severity (22.73%) 40 days post infection (dpi) and reduced AUDPC values as compared to 202–110 F1. Infection time significantly affected yield losses; early-stage infections (45 dpi), caused 52% yield reduction whereas late-stage infections (105 dpi), caused only 9% loss. Viral load, assessed by ELISA, corroborated these results, showing significantly low concentrations in later infections. The research highlights the role of time infection and genetic resistance in mitigating ToBRFV-induced losses. The 172–300 F1 genotype showed potential in breeding programs targeting ToBRFV resistance. Early infections increase economic losses, emphasizing the importance of integrated pest management including resistant cultivars. These findings provide a framework for designing effective control measures to ensure sustainability of tomato production worldwide.