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A Proposed Barley Karyotype Revision Based on C-Band Chromosome Identification¹

Individual chromosomes of barley (Hordeum vulgare L.) were identified by C-banding the primary trisomics for chromosomes 1, 2, 3, and 4 of the cultivar ‘Betze’. Karyotype analysis of C-banded chromosomes indicated that chromosome 2 was the longest chromosome while chromosome 1 had the most median centromere. Chromosomes associated with linkage groups 1, 2, 3, and 4 were similar to those described as 3, 2, 1, and 4, respectively, in the previous standard barley karyotype. A key to chromosome identification is pre~ented and a revision of the barley karyotype is proposed so that the chromosomes described correspond to the numbering of the linkage groups as currently being used for barley. The reliability of C-banding for barley chromosome identification is discussed.

Key Words: Trisomics • Linkage Groups • Heterochromatin • Hordeum vulgare L.

² Former research assistant and professor, respectively. Crop Science Dep., Univ. of Guelph.

Received for publication May 5, 1978.