Phylogenetic relationship of TJ1 isolate of<i>Banana bunchy top virus</i>from Pakistan by DNA-R sequence analysis
Bibliographic record
Abstract
The disease caused by the Banana bunchy top virus (BBTV) is a major problem in banana crops. It spreads either through vegetative propagation of the plant and (or) by means of a vector, Pentalonia nigronervosa. Planting material for banana cultivation was introduced to Sindh (a major banana-growing province of Pakistan) from many countries where BBTV was present. A recent BBTV epidemic in the Sindh region resulted in considerable damage to the banana crop. To determine the probable origin of this epidemic, BBTV was isolated from bananas in Sindh, and the DNA-R of the resulting TJ1 isolate was cloned, sequenced, and subjected to phylogenetic analysis. Analysis with the complete sequence of the DNA-R showed that the TJ1 isolate is a member of the South-Pacific group. Analysis with the coding or the conserved regions of the DNA-R supported the same grouping. The TJ1 isolate shows the highest homology with the Egyptian isolate within this group, followed by the Australian and Indian isolates. All these isolates seem to have evolved from a common ancestor.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".