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NCBI Reference Sequence (RefSeq) staff derive RefSeq sequence records from various types of primary sequence records that submitters deposit to GenBank or another INSDC collaborating database. That includes genome assembly records. Among all of the RefSeq assemblies, there are some that are of such high quality and importance to the research community that NCBI staff manually select and categorize them as reference RefSeq assemblies (also termed reference genomes).  Another category of selected genomes are representative RefSeq assemblies (representative genomes). To learn additional details about reference and representative genomes, see:

You can locate reference and/or representative genomes in the Assembly database as follows: