2012 Annual Report 1a.Objectives (from AD-416): This project is the study of the North American plums, subgenus Prunus section Prunocerasus. Specific objectives include the collection and identification of the plant specimens from the wild to increase Prunus germplasm availability at the National Germplasm Repository at Davis, CA and the clarification of their phylogenetic framework (relatedness, evolution, and character/trait diversification). A subset of representatives of the subgenus Prunus section Prunocerasus and other taxa (genus Prunus) available at the National Germplasm Repository will be included in this research to assess the morphological and genetic valus of the newly collected material. Identification of species relatedness and further classification will allow the NPGS to manimize resources and to increase the species/groups genetic variability (heterozygosity) available at the germplasm repository. 1b.Approach (from AD-416): Collection of the plant specimens, a total of 27 species with 5-10 accessions per taxa, will be made from the wild (excluding P. mume, P. salicina, and P. japonica). The majority of these species have been identified to be of importance and needed by the Natioanal Clonal Germpalsm Repository in the Prunus vulnerability statement 2010. 3.Progress Report: Collection trips were made throughout the eastern United States. This resulted in Prunus seed being collected from wild relative trees. These seeds have been transmitted to the National Clonal Germplasm Respository (NCGR). This is within NCGR CRIS Project objective 1, to strategically expand the genetic diversity in the collections. This project was extended and we have not received the report yet.