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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 548520 | 'Preston' | Glycine max (L.) Merr. | Iowa, United States | SOY | | | 1986 | DEVELOPED | | | | | | Cultivar | Preston is of Maturity Group II and best adapted to approximately 41 to 43? N Lat. It has purple flowers, tawny pubescence, brown pods at maturity, and dull-yellow seeds with gray hila. In comparison with 'Century', Preston has about 3.5% higher seed yield, more lodging susceptibility, 3 mg seed-1 lower seed weight, 0.3 percentage units lower protein, 0.3 percentage units higher oil, lower seed quality, superior hypocotyl elongation at 25 ?C, and less resistance to Fe-deficiency chlorosis on calcareous soil. The two cultivars have similar shattering resistance and time of maturity. Preston is moderately resistant to purple stain [caused by Cercospora kikuchii (T. Matsu. and Tomoyasu) Gardner]. It is susceptible to Phytophthora rot [caused by Phytophthora megasperma (Drechs.) f. sp. glycinea Kuan and Erwin], brown stem rot [caused by Phialophora gregata (Allington and Chamberlain) W. Gams], bacterial tan spot (caused by Corynebacterium flaccum-faciens), soybean mosaic virus, and Fe-deficiency chlorosis on calcareous soil. | 1443456 | PI 548520 |