Abstract
The USDA Agricultural Research Service (ARS) National Small Grains Collection (NSGC) has 207 landrace barleys obtained from a nursery grown in the Ukraine in 1930 by N.I. Vavilov, many of which have multiple resistance (MR) to disease similar to accessions from Ethiopia. The original collection locations of the accessions from the Vavilov nursery are unknown. The purpose of this study was to determine, using molecular markers, if the MR accessions of unknown origin from the Vavilov nursery are genetically related to MR accessions from Ethiopia. The genetic relatedness among susceptible accessions of unknown origin and among a selection of landrace accessions from the NSGC barley core subset was also assessed. Simple sequence repeat (SSR) and Diversity Array Technology PL (DArT) marker data were used to generate similarity matrices with Dice’s similarity coefficients. Cluster analysis from these results showed that the unknown-origin MR accessions grouped with accessions from Ethiopia. Susceptible accessions of unknown origin were genetically similar to accessions from western Asia, especially near the Caucasus, and from both southern and northern Europe. Based on similarity of marker profiles, some accessions from the core collection are likely duplicates. Future work will seek to identify the probable origin of the remainder of the unknown origin accessions and to more thoroughly characterize the genetic diversity within NSGC barley core subset.
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Bonman, J.M., Gu, Y., Coleman-Derr, D. et al. Inferring geographic origin of barley (Hordeum vulgare L. subsp. vulgare) accessions using molecular markers. Genet Resour Crop Evol 58, 291–298 (2011). https://doi.org/10.1007/s10722-010-9574-4
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DOI: https://doi.org/10.1007/s10722-010-9574-4