The genomes of many yam species contain transcriptionally active endogenous geminiviral sequences that may be functionally expressed.

ABSTRACT: Endogenous viral sequences are essentially 'fossil records' that can sometimes reveal the genomic features of long extinct virus species. Although numerous known instances exist of single-stranded DNA (ssDNA) genomes becoming stably integrated within the genomes of bacteria and animals, there remain very few examples of such integration events in plants. The best studied of these events are those which yielded the geminivirus-related DNA elements found within the nuclear genomes of various Nicotiana species. Although other ssDNA virus-like sequences are included within the draft genomes of various plant species, it is not entirely certain that these are not contaminants. The Nicotiana geminivirus-related DNA elements therefore remain the only definitively proven instances of

SUBMITTER: Filloux D 

PROVIDER: S-EPMC5014472 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature