organism: Populus x canadensis
description: Dormant fertile P. deltoides branches were collected from mature trees in January of 2012. Branches from the male P. nigra individual were forced in greenhouse conditions and pollen collected and desiccated, and stored at 4ÁC prior to being irradiated. Gamma irradiation was performed as follows: Dried pollen from male Populus nigra trees was transferred to scintillation vials and subjected to 100 Gy of gamma irradiation using a JL Shepherd Model 143-68 Irradiator (Center for Comparative Medicine, UC Davis, CA). 
attributes.tag: cultivar
attributes.value: F1 interpsecific hybrids between male Populus nigra (individual SO361SL from Greenwood Resources Inc. (OR)) and female Populus deltoides female trees (SO546SL, Greenwood Resources Inc. (OR)).
attributes.tag: label
attributes.value: IFG_100_39
attributes.tag: tissue_type
attributes.value: Leaf
attributes.tag: biomaterial_provider
attributes.value: Andrew T. Groover, Institute of Forest Genetics, Pacific Southwest Research Station, U.S. Forest Service, Davis, CA 95616, U.S.A.
attributes.tag: treatment
attributes.value: gamma irradiation (100 Gy for the IFG_100 samples and no irradiation for the IFG_0 samples)
attributes.tag: geo_loc_name
attributes.value: missing
attributes.tag: age
attributes.value: missing
attributes.tag: BioSampleModel
attributes.value: Plant