Ian D. Bedford

TL;DR: The 16S and COI sequence data indicate that the B‐biotype originated in the Old World and is most closely related to B‐like variants from Israel and Yemen, with the next closest relative being a biotype from Sudan.

TL;DR: The recently identified “B” biotype, characterised by a diagnostic esterase banding pattern and by its ability to induce phytotoxic responses in squash, honeysuckle and nightshade was readily distinguished from non-’B’ biotype populations.

TL;DR: Analysis of sequences revealed a highly conserved organization for DNA beta molecules consisting of a single conserved open reading frame, an adenine-rich region, and a region of high sequence conservation [the satellite conserved region (SCR).

TL;DR: It is demonstrated that yellow vein disease of A. conyzoides results from co-infection by AYVV DNA A and a circular DNA that is approximately half its size that is designated DNA beta, which represents a satellite-like DNA.

TL;DR: The analysis shows that DNA 1 components are associated with the majority of begomovirus-DNA beta complexes, being absent from only two of the complexes examined, both of which have their origins in Far East Asia.