Tepary bean (Phaseolus acutifolius) is being re-visited by several dry bean breeding programs as a source of tolerance to various biotic and abiotic stresses. It is already the source of tolerance to common bacterial blight used by all North American breeders. In the field last summer, we observed halo blight and bacterial brown spot tolerance in our interspecies hybrid offspring from crosses between susceptible common bean and tepary. We would like to propose a continuation of the tepary bean genetics project and expand it to include direct collaboration with colleagues in Colombia and Puerto Rico to assess stress tolerance in progeny from crosses between common and tepary bean. We will investigate chilling tolerance and disease resistance in Saskatoon and heat and drought tolerance in Puerto Rico and Colombia. We would use the genomic resources generated under IMAP to map the tepary genome as well as assess the level of introgression of tepary genome in the most promising interspecies hybrids.