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Diversity of DNA beta, a satellite molecule associated with some monopartite begomoviruses.
TLDR
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). Expand
Geminivirus transmission and biological characterisation of Bemisia tabaci (Gennadius) biotypes from different geographic regions
TLDR
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. Expand
Revision of Begomovirus taxonomy based on pairwise sequence comparisons
TLDR
Revised guidelines for the classification and nomenclature of begomoviruses are proposed and genome-wide pairwise identities of 91 % and 94 % are proposed as the demarcation threshold for begomviruses belonging to different species and strains, respectively. Expand
Virology division news: Revision of taxonomic criteria for species demarcation in the family Geminiviridae, and an updated list of begomovirus species
TLDR
Members of the family Geminiviridae characteristically have circular single-stranded DNAgenomes packaged within twinned (so-called geminate) particles that cause yield losses to many crop plants throughout the world. Expand
Detection of subgroup III geminivirus isolates in leaf extracts by degenerate primers and polymerase chain reaction
TLDR
The demonstrated exclusive specificity of the assay for subgroup III geminiviruses offers a highly simplified PCR-based assay that permits the detection of a geographically diverse collection of WFT geminIViruses infecting cultivated crops, ornamentals, and weed hosts with minimal sample preparation. Expand
Variation in biological characteristics and esterase patterns among populations of Bemisia tabaci, and the association of one population with silverleaf symptom induction
TLDR
From these data, it was possible to correlate a specific esterase banding pattern (A or B) with reproductive capabilities and the ability to induce SSL and WS symptoms and, in transmission studies, whiteflies from cotton or pumpkin sources did not induce silverleaf or white stem symptoms in Cucurbita spp. Expand
Three cadherin alleles associated with resistance to Bacillus thuringiensis in pink bollworm
TLDR
The results reported here identify the cadherin gene as a leading target for DNA-based screening of resistance to Bt crops in lepidopteran pests. Expand
A genome-wide pairwise-identity-based proposal for the classification of viruses in the genus Mastrevirus (family Geminiviridae)
TLDR
A user-friendly computer program is presented, SDT (species demarcation tool), for calculating and graphically displaying pairwise genome identity scores, and modified versions of these protocols are proposed that should substantially minimise the degree of classification inconsistency under the current system. Expand
Molecular Evidence for Five Distinct Bemisia tabaci (Homoptera: Aleyrodidae) Geographic Haplotypes Associated with Cassava Plants in Sub-Saharan Africa
TLDR
P phylogenetic analysis of B. tabaci mtCOI haplotypes examined thus far from the African continent has revealed five major cassava-associated haplotypes, which grouped primarily based on extant geography, with the exception of one and two collections from Cameroon and Zimbabwe, respectively. Expand
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