RT Conference Proceedings T1 The begomovirus tomato leaf curl New Delhi virus is not seed-transmitted in melon A1 M. Fortes, Isabel A1 Pérez-Padilla, Verónica A1 Romero-Rodríguez, Beatriz A1 Fernández Muñoz, Rafael A1 Moyano, Cristina A1 Castillo-Garriga, Araceli A1 De León, Leandro A1 Moriones, Enrique K1 Virus fitopatógenos K1 Melones K1 Tomates - Enfermedades y plagas K1 Semillas - Enfermedades y plagas AB Transmission of plant viruses through seed can be one of the major factors contributing to longdistancedispersal through global trade of seeds and can have important ecologicalconsequences for virus dissemination. Begomoviruses (genus Begomovirus, familyGeminiviridae), and among them isolates of the species Tomato leaf curl New Delhi virus(ToLCNDV), cause significant yield losses in economically important crops worldwide. Theseviruses are horizontally transmitted in nature in a circulative and persistent manner by thewhitefly Bemisia tabaci but in recent years several reports have raised the possibility of verticaltransmission through seeds for some members of this genus. We have investigated the possibletransmission by melon (Cucumis melo L.) seeds of a ToLCNDV isolate of the “Spain” strain,in three different melon cultivars (all susceptible to ToLCNDV). The presence of ToLCNDVin floral tissues and the detection of viral DNA in seeds reveals the seed-borne nature of thisvirus. However, grow-out studies conducted with the progeny of melon plants germinated fromseeds collected from ToLCNDV-infected plants and evaluated at early (1 leaf) or at late (20leaves) growth stages did not support the vertical transmission of ToLCNDV from seeds to theoffspring. YR 2022 FD 2022 LK https://hdl.handle.net/10630/24431 UL https://hdl.handle.net/10630/24431 LA eng NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 4 mar 2026