AI Insight
Plant and animal genome assemblies deposited in international databases frequently lack essential biological context such as ploidy, cultivar information, and subgenome structure because these attributes are optional and entered as uncontrolled free text. The authors developed a pipeline to recover this missing information from linked publications, which successfully found ploidy information for about half of 1,059 plant assemblies tested, but found publications without ploidy statements for nearly one-third. They propose making ploidy, cultivar, and subgenome structure mandatory controlled-vocabulary fields at the time of genome submission to prevent future data gaps.
Why it matters
Without standardized metadata, researchers cannot properly interpret or compare genome assemblies, which limits the utility of these publicly funded resources for crop improvement, evolutionary studies, and other genomic research. Implementing mandatory controlled vocabularies at submission would ensure that essential biological context is captured systematically rather than requiring labor-intensive recovery from literature.
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⚠️ Preprint – Noch nicht peer-reviewed
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Plant and metazoan genome assemblies are being deposited in the International Nucleotide Sequence Database Collaboration (INSDC) archives at an accelerating rate, but the biological context needed to interpret them, such as ploidy, cultivar, and subgenome structure, is often missing from the record: these attributes are optional in most submission checklists and, when supplied, are entered as free text. We describe the gap in three layers. Ploidy varies within a species and cannot be inferred from taxonomy; chromosome-naming conventions differ between assemblies of the same crop; and that inconsistency is concentrated in species named by subgenome and is not associated with the size of the research community, which points to the lack of a shared convention. As a case study, we built a pipeline that recovers these attributes from the publications linked to an assembly. On a benchmark of 82 assemblies, its current version reported one wrong ploidy, and across 1,059 plant assemblies an earlier, less strict version found the ploidy in a publication for about half; for nearly a third, it found a publication but no statement of ploidy in it. Recovery from the literature can annotate assemblies already deposited but cannot stop new ones from arriving incomplete. We therefore propose that ploidy, cultivar, and subgenome structure be captured at submission as mandatory, controlled-vocabulary attributes, building on existing INSDC and Genomic Standards Consortium checklists.