Molecular Characterization of Squash Leaf Curl China Virus Infecting Pumpkin in Kanchanaburi Province

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Wiwat Piyatasse
Ratchanee Hongprayoon

Abstract

Molecular characterization of Squash leaf curl China virus (SLCCNV) was carried out on tissues taken from 19 pumpkin samples that showed begomovirus-like symptoms. The samples were collected from Wang Dong subdistrict, Muang district, Kanchanaburi province in 2016. They underwent preliminary screening with six antibodies specific to cucurbit-infecting viruses, and negative results were obtained from 14 samples. However,
all of them were positive for the specific primers to the coat protein genes belonging to Tomato leaf curl New Delhi virus (ToLCNDV) and SLCCNV. Sample KN44 was selected for genome amplification by rolling circle amplification. A single-cut digestion with BamHI for DNA-A and HindIII for DNA-B was performed and the DNA was cloned into pQE80-L plasmid vector. The recombinant plasmid was transformed into Escherichia coli DH5a for nucleotide sequencing. The results revealed that the DNA-A component was closely related to SLCCNV isolate Thailand segment A at 97.95 % identity. There were 5 open reading frames (ORFs) comprising AV1, AV2, AC1, AC2 and AC3. The DNA-B component was closely related to SLCCNV isolate Hainan segment B at 91.05% identity and contained 2 ORFs comprising BV1 and BC1. This study is special for a number of reasons, one of which is that this is the first time that genetic information concerned with the SLCCNV DNA-A and DNA-B genomes has been researched and made available in Thailand. This work will surely be of further benefit to researchers and plant breeders in the fields of disease resistance and disease surveillance.

Article Details

How to Cite
Piyatasse, W. ., & Hongprayoon, R. . (2020). Molecular Characterization of Squash Leaf Curl China Virus Infecting Pumpkin in Kanchanaburi Province. King Mongkut’s Agricultural Journal, 38(3), 342–350. retrieved from https://li01.tci-thaijo.org/index.php/agritechjournal/article/view/215379
Section
Research Articles

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