Abstract
This study aims to identifying and characterizing some molecular properties of geminiviruses co-infection in squash field crop cultivated in Egypt. Squash crops observed to be heavily infected with several insect vectors, also severe chlorosis and stunting was observed. Electron microscopic analysis has revealed geminate capsid particles which indicate the infection of Geminiviruses, especially SqLCV which represent an economic problem to squash filed crop in Egypt. We have investigated possible mixed infections with different plant viruses associated with chlorotic stunt diseases and or other genus groups of geminiviruses. The main objective of this study is to investigate the recombination events, possible recombinants and variants among these genera in the same family differing in vector transmission. This is the first report of the molecular characterization, phylogenetic analysis and putative recombination events of the full length genome of the Chickpea Chlorotic Dwarf Mastrevirus in Egypt. And the first report of co-infection with another begomovirus infecting squash plants. A full length clone of both viruses were isolated and characterized at the molecular level. The complete nucleotide sequence of DNA-A was determined (2,572 bp) and submitted to the genbank under accession no. KF692356. The isolate from Egypt has about 97.8 % homology with the Chickpea chlorotic dwarf virus (CpCDV) isolate from Syria DNA-A isolate FR687959, a 83.2 % homology with the Sudan isolate AM933134 and a 82.7 % homology with Pakistan isolate FR687960. To best of our knowledge this is the first report of complete genome of CpCDV that infect squash plants in Egypt and worldwide.
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Acknowledgments
This work has been done by the full funding of the Agricultural Genetic Engineering Research Institute. A partial funding from the Science and Development Fund, STDF during a collection mission funded by Project #892 for whitefly and virus collection has contributed in enhancing our virus collection. The thanks also are extended to Eng. Nasser El-Torky, PICO Company Lab Executive Manager for his help in virus collection in Mansoria and El-Behira region.
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Fahmy, I.F., Taha, O. & El-Ashry, A.N. First genome analysis and molecular characterization of Chickpea chlorotic dwarf virus Egyptian isolate infecting squash. VirusDis. 26, 33–41 (2015). https://doi.org/10.1007/s13337-014-0246-4
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DOI: https://doi.org/10.1007/s13337-014-0246-4