Evaluation location: California, United States
The germplasm accessions (C0 population) phenotyped in our study were 853 asexually propagated F. ×ananassa, F. chiloensis, and F. virginiana individuals preserved in the UC Davis (UCD) Strawberry Germplasm Collection (SGC) and USDA National Plant Germplasm System (NPGS) collections. We acquired ‘mother’ plants for 265 of these individuals from the USDA NPGS National Clonal Germplasm Repository in Corvallis, Oregon. The other 588 were among holdings in the SCG as of February 1, 2015. C0 individuals were preserved and annually propagated from mother plant stolons at the Wolkskill Experiment Orchard (WEO), Winters, CA, over the course of our studies. UCD and USDA identification and plant introduction numbers, aliases, pedigrees, and passport information for C0 population individuals (n=853) are tabulated in Supplemental File S1). The C0 population was comprised of 788 F. ×ananassa cultivars and other hybrids, 39 F. chiloensis ecotypes, and 36 F. virginiana ecotypes (SupplementalFileS1). The daughter plants (bare-root clones) of C0 individuals were produced from mother plants grown at a low-elevation location (41m; Winters, CA) for the spring-planted 2016 study and a high-elevation location (1284m; Dorris, CA) for the fall-planted 2016 to 2017 study.