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Identification of Viroids in Citrus Orchards in Tunisia

The cachexia disease caused by specific variants of Citrus viroid II (CVd-II) has been identified in commercial orchards of Cassar Clementine and common mandarin in Tunisia. Since commercial cultivars are usually grown on sour orange rootstock in Tunisia, exocortis symptoms have not been observed. W...

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Main Authors: Najar, Asma, Durán-Vila, Núria, Caruana, M. L.
Format: Objeto de conferencia
Language:Inglés
Published: IOCV 2021
Subjects:
Citrus exocortis viroid
Cachexia
H20 Plant diseases
U30 Research methods
Viroids
Citrus
Tunisia
Rootstocks
Tolerance to diseases
Plant diseases
Disease symptoms
Inoculation
Online Access:http://hdl.handle.net/20.500.11939/7817
https://iocv.ucr.edu/sites/g/files/rcwecm4696/files/2020-06/398-400%20IOCV15.pdf
Summary:The cachexia disease caused by specific variants of Citrus viroid II (CVd-II) has been identified in commercial orchards of Cassar Clementine and common mandarin in Tunisia. Since commercial cultivars are usually grown on sour orange rootstock in Tunisia, exocortis symptoms have not been observed. Within the framework of the National Program for the selection of varieties free of virus and virus-like agents, indexing for citrus viroids allowed the identification of additional viroids in tolerant scion/rootstock combinations. In addition to CVd-II and Citrus exocortis viroid, we identified Citrus viroid I, Citrus viroid III and Citrus viroid IV.

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