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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 704478 | 'Top Shelf' | Hordeum vulgare L. subsp. vulgare | Oregon, United States | NSGC |  | | 2024 | DEVELOPED | | | | | | Cultivar | ‘Top Shelf’ is a two-row winter barley (Hordeum vulgare L.) released by Oregon Agricultural Experiment Station in 2023. It is a malting cultivar that is known to be a non-producer of glycosidic nitrile (GN0). Glycosidic nitrile is the precursor to a regulated compound (ethyl carbamate) in distilled spirits and thus, the GN0 trait is becoming a requisite for malting cultivars geared towards distilling. While GN0 spring cultivars have been commercially available for over 20 years, Top Shelf is the first winter GN0 cultivar to be released in North America, and only the second globally. In addition to its GN0 status it meets or exceeds contemporary agronomic and malt quality expectations. Over five years of field trials in Oregon it performed equal to or better than the check entries. It shows high yields, percentages of plump seed, and test weights. It also has good resistance to scald and preliminary data suggest resistance to barley stripe rust. These results were confirmed in field trials in southern Idaho, a major malting barley production region, and a target environment for this cultivar. Under standard malting protocols Top Shelf meets the guidelines for malt for all-malt and/or grain distilling, with high extract, enzymatic activity, and free amino nitrogen. When malted under optimized conditions, mimicking commercial distilling malt production, it produced even better results. As one of only a handful of GN0 cultivars available in the United States with potential for mainstream production, Top Shelf provides an important option for the distilling supply chain. | 2165795 | PI 704478 |