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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 700112 | 'Empire' | Andropogon gerardi Vitman | Wisconsin, United States | S9 | | | 2022 | DEVELOPED | | | | | | | Empire big bluestem is a 54-clone synthetic selected for high biomass yield. Empire is broadly adapted to USDA hardiness zones 3 through 7, ranging from the Great Plains to the Eastern USA. While Empire was developed as a high-biomass cultivar for use in establishing perennial biomass production for conversion to bioenergy, it has a heading date similar to many other big bluestem cultivars, suggesting that it could be used as a forage crop as well, for either hay or pasture production. Under an optimal single-harvest biomass production management, Empire ranked #1 in biomass yield for eight of 12 locations in multiple-year trials, averaged over a total of 40 environments (location-trial-years). Biomass yield of Empire, averaged over 12 locations, was 30% higher than for Goldmine, 46% higher than for Champ, and 52% higher than for Bonanza. Ground cover of Empire was slightly higher than for most check cultivars, averaging 80% across all 12 locations. Empire is broadly adapted to USDA hardiness zones 3 to 6, extending from the Great Plains to the Eastern USA, and was released to the public by the USDA-ARS in 2021. | 2137511 | PI 700112 |