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The cold-hardy  Vitis  (grape) collection at the USDA/ARS Plant Genetic Resources Unit in Geneva, N.Y., comprises ≈1300 accessions. While much of the collection has been evaluated for morphological and viticultural traits, little of it has been well-characterized genetically. Lack of genetic information hampers the identification of accessions, the determination of genetic relationships among them, the evaluation of potential new accessions, and the construction of a core subset of the collection. Because simple sequence repeat DNA polymorphisms (SSRs or microsatellites) have already been proven to be useful genetic markers in  Vitis vinifera  (non-cold-hardy wine, raisin, and table grapes), our research focuses on the use of the markers both for the identification (“fingerprinting”) of species, hybrids, subspecies, cultivars (varieties), and accessions of cold-hardy  Vitis , and for the determination of genetic relationships between these taxa. Our latest research results in this area will be presented.

Progress in the Characterization of Cold-hardy Grapes using Simple Sequence Repeat DNAs (SSRs)