Summary
Dialect-1, species-specific repetitive DNA sequence of barley Hordeum vulgare, was cloned and analysed by Southern blot and in situ hybridization. Dialect-1 is dispersed through all barley chromosomes with copy number 5,000 per genome. Two DNA fragments related to Dialect-1 were revealed in λ phage library, subcloned and mapped. All three clones are structurally heterogenous and it is suggested that the full-length genomic repeat encompassing Dialect-1 is large in size. The Dialect-1 DNA repeat is represented in the genomes of H. vulgare and ssp. agriocrithon and spontaneum in similar form and copy number; it is present in rearranged form with reduced copy number in the genomes of H. bulbosum and H. murinum, and it is absent from genomes of several wild barley species as well as from genomes of wheat, rye, oats and maize. Dialect-1 repeat may be used as a molecular marker in taxonomic studies and for identification of barley chromosomes in interspecies hybrids.
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Communicated by Yu. Gleba
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Sonina, N.V., Lushnikova, A.A., Tihonov, A.P. et al. Dialect-I, species-specific repeated DNA sequence from barley, Hordeum vulgare . Theoret. Appl. Genetics 78, 589–593 (1989). https://doi.org/10.1007/BF00290846
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DOI: https://doi.org/10.1007/BF00290846