Abstract
In Brazil, the main viral disease of melon plant is severe yellowing disease called "Amarelão do Meloeiro," and a polerovirus, cucurbit aphid-borne yellows virus (CABYV) was considered one of the etiological agents. This virus is a recombinant strain originated from CABYV and unknown polerovirus. Due to unsuccessful mechanical inoculations of CABYV to host plants, the study of its biological characterization is hampered. Therefore, an infectious clone of the recombinant strain of CABYV was constructed using the Gibson Assembly technology. The full-length cDNA clones produced in this study showed to be infectious in three cucurbit species; melon (Cucumis melo), squash (a hybrid of Cucurbita maxima × C. moschata), and West Indian gherkin (Cucumis anguria) plants, but not in watermelon, cucumber, and zucchini plants. This insusceptibility of watermelon plants to the infectious clone corroborates the observation that this virus was never found in watermelon plants often located next to the infected melon plants. This infectious clone provides important tools for future study in developing resistant melon variety to CABYV infection.
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