PGRU Onion (Allium) Collection
The PGRU onion (Allium) collection consists of more than 1100 different accessions. Alliums are a biennial crop (needing 2 years to produce seed). Those accessions needing regeneration are chosen yearly by Dr. Zachary Stansell, geneticist and acting vegetable crop curator. The short-day onion collection for the Plant Genetic Resources Unit is maintained by a partnership with New Mexico State University. In our collection, we house 4 unique species: cepa (onion), cepa L. var. Cepa (spring onion), fistulosum (Welsh onion), and tuberosum (garlic chives).
The PGRU Allium collection spans almost 100 years of history, with our first accession collected from Greece in 1918 to our most recent addition from the United States in 2004. Our collection has grown through the donation, collection, and development of Apium germplasm. Onions hail from almost all parts of the world, and our collection is no exception with germplasm from Turkey, various parts of the United States, Japan, and Morocco.
Visit the ONION crop page in GRIN-Global to find citations, descriptor data, and genetic markers.
Read here to learn more about our research project on the regeneration of Short-Day Onions and PGRU's research on onion diversity!
For more information on growing practices, head to the ONION production page.
Looking for plant germplasm? Review our distribution policy for germplasm requests.
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Onion Production in the United States
Data from USDA NASS
PGRU Onion Accession Distribution 1987-2021
Data from GRIN-Global