In a survey conducted in 2012 and 2013, 1166 samples from alfalfa plants and 202 samples from symptomatic weeds and cultivated plants growing adjacent to alfalfa fields were collected. Using DAS-ELISA, Alfalfa mosaic virus (AMV) was detected in 58.4% of the alfalfa samples and in 63.9% of the weeds and cultivated plants samples. ELISA detection of AMV was confirmed by testing representative samples from all regions by RT-PCR using a pair of primers (AMV/F and AMV/R) specific to the AMV coat protein (CP) gene. The size of the major product obtained from AMV-infected plants was identical to the 700 bp size expected from the CP gene of AMV. The amino acids and the nucleotide sequences of 17 Saudi AMV isolates from alfalfa, and 16 from other cultivated plants and weeds detected in different regions in Saudi Arabia showed a percentage of similarity that ranged between 87.9%–100% among them and 86.2% - 100% when compared with sequences of 15 different AMV isolates reported in the GenBank. This is the first time AMV was detected in Vigna unguiculata and in the following weed plant species: Chenopodium quinoa, Convolvulus arvensis, Malva parviflora, Hibiscus spp., Hippuris vulgaris, Cichorium intybus, and Flaveria trinervia in Saudi Arabia.
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This Project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number (10-BIO 979-02).
This research is part of a project funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Grant Number (10-BIO 979-02). This manuscript complies with the Ethical Rules applicable for this journal. The authors declare that they have no conflict of interest. This article does not contain any studies with human participants or animals performed by any of the authors. Informed consent was obtained from all individual participants included in the study. It also complies with all details of the relevant ethical rules that came under the following headings:
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Abdalla, O.A., AL-Shahwan, I.M., AL-Saleh, M.A. et al. Molecular characterization of Alfalfa mosaic virus (AMV) isolates in alfalfa and other plant species in different regions in Saudi Arabia. Eur J Plant Pathol (2020) doi:10.1007/s10658-019-01910-z
- Saudi Arabia