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ViroBland: A Small-Scale Mixed Pre-training Corpus

ViroBland is a small (216 Mbp) mixed pre-training corpus that combines broad genomic context with enriched viral signals. It is built with source-wise stratified sampling to balance three heterogeneous data sources, enabling compute-efficient and reproducible pre-training while retaining strong viral in-domain coverage.

Overview

  • Scale: Small (216 Mbp; ~216M bases)
  • Sources: 3 (Human reference + Multi-species + Viral in-domain)
  • Final split sizes: Train 32,023 / Val 4,000 / Test 2,662 sequences

Data Sources

  1. Human Reference (GRCh38 / hg38; following HyenaDNA)
  2. Multi-species Diversity (Nucleotide Transformer dataset)
  3. Viral In-domain Data (OpenVirus)
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Models trained or fine-tuned on YDXX/ViroBlend