(...) DNA extracted from CoYMV virions consists of linear and circular forms, which migrate separately in agarose gels. CoYMV genomic DNA appears to have two single-stranded discontinuities and was not shown to be infectious. Preliminary data on three other viruses similar to CoYMV in size and morphology-banana streak virus (BSV), canna yellow mottle virus (CaYMV), and Kalanchoe top-spotting virus (KaTSV)-indicate that they also contain double-stranded DNA of similar size. These plant viruses are of potential interest for use as vectors for gene transfer in higher plants
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B. E. L. Lockhart (1990) studied this question.