The BreedStream R package was designed for primary deployment in the form of a Shiny App. This Shiny App, BreedStream was designed as a full end-to-end analysis and prediction pipeline for the University of Wisconsin - Madison Corn Breeding Programs led by Drs. Shawn Kaeppler and Natalia de Leon. This package represents a serious of functions primarily utilized by the aforementioned Shiny App. The functions found within the BreedStream R package are largely built on the foundations of the StageWise and COMA R packages, both of which were developed by Dr. Jeff Endelman at the University of Wisconsin - Madison and can be found on his GitHub. Another source for inspiration was SimpleMating developed by the Resende Lab at the University of Florida.