Create README.md

README.md

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+---
+tags:
+- biology
+- DNA
+- genomics
+---
+
+# Pretraining dataset
+
+For pretraining and validation, we curated a dataset comprising all 19,551 representative genomes sourced from the National Center for Biotechnology Information (NCBI)
+database by February 23, 2024, including 18,268 bacterial, 647 archaeal, 577 fungal, 40 viral, and 1 human reference genome. 
+Then, to create samples, we created chunks of 3200 long nucleotide sequences with 100 bases overlapping. 
+The resulting train set has 27,831,882 samples, the validation set has 3,478,985, and the test set has 3,478,986 samples. 
+
+
+## Dataset Structure
+
+Each dataset sample contains the following information:  
+
+- **`assembly_accession`**: Genome assembly identifier  
+- **`seq_id`**: Accession identifier  
+- **`assembly_id`**: Line number in the file  
+- **`start`**: Start position of the sequence read within the accession ID  
+- **`sequence`**: DNA sequence data  
+- **`sequence_length`**: Length of the DNA sequence sample  
+- **`split`**: Dataset split category