Dnaddr.yuan_p-11-22.4.var -

: Almost certainly stands for "variant" or "variable," common in bioinformatics or programming.

: Likely the name of the lead researcher or the lab where the data originated.

: This often looks like an abbreviation for a genus/species or a specific project database (e.g., Dendrobium or a specific DNA address protocol).

Is it part of a or an "arg" (alternate reality game)?