Original: The genetic material can be ssRNA, dsRNA, ssDNA or dsDNA ('ss-' or 'ds-' prefix denotes single strand or double strand) between 5,000 and 500,000 nucleotides long with either circular or linear arrangement.
Simplified: The genetic material can be ssRNA, dsRNA, ssDNA, or double-stranded DNA between 5 and 500 kilo base pairs long with either circular or linear arrangement.