Czech J. Genet. Plant Breed., X:X | DOI: 10.17221/54/2026-CJGPB

 Evaluation of Tomato yellow leaf curl virus (TYLCV) resistance and yield performance of different genotypes of tomatoOriginal Paper

Mollah Naimuzzaman ORCID...¹, Faizur Rahman ORCID...², Md. Fayez Al-Hakim Khan ORCID...², Md Mahabub Hasan ORCID...², Farhana Tasmim ORCID...², Real Chandra Das ORCID...², Md. Rishad Khan ORCID...², Md. Mahdi Hasan Munna ORCID...³, Md Abdul Halim ORCID...^4,7, Kun Cho ORCID...^5,6, Md. Omar Sharif ORCID...¹, Swapan Kumar Roy ORCID...², Farjana Sultana ORCID...², Fahim Ahmed ORCID...²

¹ Department of Agroforestry and Environmental Science, Faculty of Agriculture, Sylhet Agricultural University, Sylhet, Bangladesh

² College of Agricultural Sciences, IUBAT-International University of Business Agriculture and Technology, Dhaka, Bangladesh

³ Department of Agronomy and Haor AgricultureFaculty of Agriculture, Sylhet Agricultural University, Sylhet, Bangladesh

⁴ Global Center for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, Australia

⁵ Biopharmaceutical Mass Spectrometry Research Unit, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute, Ochang, Cheongju, Republic of Korea

⁶ Division of Bio-Analytical Science, University of Science and Technology (UST), Daejeon, Republic of Korea

⁷ Department of Biotechnology, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh

 Since Tomato yellow leaf curl virus (TYLCV) causes severe losses in tomato crops worldwide the search for genetic resources for breeding high-yielding, disease-resistant varieties remains challenging. We tested 25 tomato genotypes under field conditions to identify high-yielding disease-resistant genotypes. We identified several promising genotypes using advanced statistical methods, particularly genotype G13 which had a high yield of 8.8 kg per plant with 8.7 fruits per cluster and showed a low disease severity under high natural infection pressure. The genotypes G2, G3, G10, G11 showed moderate resistance, with disease severity ranging from 12.5% to 19.4%. The highest-yielding genotypes also had higher numbers of branches and fruit clusters. The high heritability of these traits indicates their potential usefulness as selection criteria in breeding programmes. The identified genotypes might provide useful genetic resources for developing high-yielding tomato varieties suitable for cultivation in TYLCV-prone areas. This work bridges the critical gap between disease resistance and yield potential, giving farmers actionable options to protect their harvests.

Keywords: disease severity; genetic variability; heritability; principal component analysis; whitefly (Bemisia tabaci)

Received: April 28, 2026; Revised: July 27, 2026; Accepted: July 29, 2026; Prepublished online: August 20, 2026