Analysis of multiple copies of geminiviral DNA in the genome of four closely related Nicotiana species suggest a unique integration event

Previously, we discovered multiple direct repeats of geminivirus-related DNA (GRD) sequences clustered at a single chromosomal position in Nicotiana tabacum (tobacco). Here we show that, in addition to tobacco, multiple copies of these elements occur in the genomes of three related Nicotiana species...

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