A multiplex PCR method discriminating between the TYLCV and TYLCV-Mld clades of Tomato yellow leaf curl virus

Lefeuvre Pierre, Hoareau Murielle, Delatte Hélène, Reynaud Bernard, Lett Jean-Michel. 2007. A multiplex PCR method discriminating between the TYLCV and TYLCV-Mld clades of Tomato yellow leaf curl virus. Journal of Virological Methods, 144 (1) : 165-168.

https://doi.org/10.1016/j.jviromet.2007.03.020

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Résumé : Tomato yellow leaf curl virus (TYLCV) is one of the causal agents of tomato yellow leaf curl disease (TYLCD) and can cause up to 100% yield losses in tomato fields. As TYLCV continues to spread, many isolates have been described in different parts of the world. Recently two closely related but distinct TYLCV clades, called TYLCV and TYLCV-Mld, have been identified. Isolates from those two clades differ mainly in the nucleotide sequences of their replication associated protein genes but do not display significantly different symptomatology. In order to improve monitoring of the rapidly expanding worldwide TYLCD epidemic, a multiplex polymerase chain reaction assay (mPCR) was developed. A set of three primers were designed to detect and characterize the TYLCV and TYLCV-Mld clade isolates. The specificity and sensitivity of the mPCR were validated on TYLCV infected tomato plants and Bemisia tabaci whiteflies. Being cheap, fast and highly sensitive this new diagnostic tool should greatly simplify efforts to trace the global spread of TYLCV

Mots-clés Agrovoc : Solanum lycopersicum, géminivirus enroulement jaune tomat, épidémiologie, PCR, identification, begomovirus

Mots-clés complémentaires : Émergence, Tomato yellow leaf curl virus

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

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