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@@ -120,3 +120,24 @@ guix. To freeze dependencies: pip freeze --path venv/lib/python3.8/site-packages > requirements.txt ``` + +## QTLReaper (rust-qtlreaper) and Trait Files + +To run QTL computations, this system makes use of the [rust-qtlreaper](https://github.com/chfi/rust-qtlreaper.git) utility. + +To do this, the system needs to export the trait data into a tab-separated file, that can then be passed to the utility using the `--traits` option. For more information about the available options, please [see the rust-qtlreaper](https://github.com/chfi/rust-qtlreaper.git) repository. + +### Traits File Format + +The traits file begins with a header row/line with the column headers. The first column in the file has the header **"Trait"**. Every other column has a header for one of the strains in consideration. + +Under the **"Trait"** column, the traits are numbered from **T1** to **T<n>** where **<n>** is the count of the total number of traits in consideration. + +As an example, you could end up with a trait file like the following: + +```txt +Traits BXD27 BXD32 DBA/2J BXD21 ... +T1 10.5735 9.27408 9.48255 9.18253 ... +T2 6.4471 6.7191 5.98015 6.68051 ... +... +``` |