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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 637937 | US 4808 Minnesota (F. virginiana virginiana) | Fragaria virginiana Mill. subsp. virginiana | Maryland, United States | COR | | Not Available | 2002 | DEVELOPED | 12/06/2001 | | | | | Wild material | US 4808 was collected in 1986 from a wild population of Fragaria viriniana in Minnesota. this clone appears typical of native populations in terms of morphology, runnering, flowering, responses, and fruit development. The outstanding feature of US 4808 is its high degree of resistance to infection by highly viulent strains of Xanthomonas fragariae. It was tested against X. fragariae strains Xf3, Xf6, and ATCC 33239, each representing one of the four recognized differentially pathogenic strain groups of X. fragariae. US 4808 was not tested or selected for reistance to other diseases. In a cross with a highly susceptible variety, US 4808 transmitted resistance to 8-12% of its progeny, depending on the virulence of X. fragariae strains, and it should be a suitable disease-resistant parent for breeding disease-resistant varieties adapted to different cultural systems and environments.
| 1636878 | PI 637937 |
| 1 | PI 637938 | US 4809 | Fragaria ×ananassa Duchesne ex Rozier | Maryland, United States | COR |  | Not Available | 2002 | DEVELOPED | 12/06/2001 | | | | | Cultivar | US 4809 originated from a cross between the variety Earliglow and Fragaria virginiana clone SG-26. US 4809 was selected in 1980 and maintained as a potential parent for additional crosses. SG-26 was received in 1976 and entered in the USDA Plant Introduction system as PI 414129. It was collected in Georgia where it had been in cultivation by the same family since 1900. It presumably was of either pure Fragaria virginiana lineage or a chance seedling resulting from a cross between wild clones of Fragaria virginaiana. the outstanding feature of US 4809 is its high degree of resistance to infection by highly virulent strains of Xanthomanas fragariae. It was tested against X. fragariae strains Xf3, Xf6, 1425, and ATCC 33239, each representing one of the four recognized differentially pathogenic strain groups of X. fragariae. US 4809 was not tested or selected for resistance to other diseases. In a cross with a highly susceptible variety, US 4809 transmitte resistance to 4-18% of its progeny, depending of the virulence of the X. fragariae strains, and it should be a suitable disease-resistant parent for breeding disease-resistant varieties adapted to different cultural systems and environments.
| 1636879 | PI 637938 |