Secoviridae: The Amalgamation of the Families <i>Sequiviridae</i> and <i>Comoviridae</i>
Bibliographic record
Abstract
Abstract Several plant viruses share features with animal and human viruses of the family Picornaviridae , including a conserved structure of both the virus particle and the viral genome, expressing viral proteins by proteolytic cleavage of large polyproteins and encoding replication proteins with conserved sequence motifs. Members of the family Comoviridae were originally described as the only plant picorna‐like viruses. Other plant picorna‐like viruses were later discovered and classified in the family Sequiviridae . Sequiviridae and Comoviridae are related to each other in phylogenetic studies and share the common property of encoding specialized proteins to enable their movement in the plant. Recently, it was proposed to regroup plant picorna‐like viruses into a single family termed ‘secoviridae’. The proposed family amalgamates the families Comoviridae and Sequiviridae , and incorporates other plant picorna‐like viruses currently classified in the genera Sadwavirus and Cheravirus , and the proposed genus ‘ Torradovirus ’. Key concepts: Many plant viruses are related to the animal and human picornaviridae and to other picorna‐like viruses infecting algae and arthropods. A recent update in the taxonomy of plant picorna‐like viruses has lead to the creation of the family ‘secoviridae’ which amalgamates the families Comoviridae and Sequiviridae as well as the existing genera Cheravirus , Sequivirus and the proposed genus ‘torradovirus’. Secoviridae share many common characteristics including having both similar virus particle structures and genomic organizations, and requiring a specialized protein to facilitate their movement within the host plant. Secoviridae produce their proteins in the form of large polyproteins that are cleaved at specific sites by a viral proteinase. Replication of the viral RNA occurs in large protein complexes in association with intracellular membranes from the host. Plant cells infected with secoviridae generally display tubular structures that are composed of the viral movement protein, contain virus‐like particles and traverse the cell wall. These tubular structures are probably involved in the movement of the virus from cell to cell. Secoviridae can be transmitted through seeds and pollen or with the help of nematode or arthropod vectors and their spread in the field is largely dependent on their mode of transmission.
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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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".