Giemsa C-banded karyotypes of diploid and tetraploidHordeum bulbosum (Poaceae) |
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| Authors: | Ib Linde-Laursen Roland von Bothmer Niels Jacobsen |
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| Institution: | (1) Agricultural Research Department, Risø National Laboratory, Postboks 49, DK-4000 Roskilde, Denmark;(2) Department of Crop Genetics and Breeding, The Swedish University of Agricultural Sciences, Svalöv, Sweden;(3) Institute of Botany, The Royal Veterinary and Agricultural University, Frederiksberg C (Copenhagen), Denmark |
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| Abstract: | The similar-looking basic genomes ofHordeum bulbosum (2x and 4x) have five rather similar metacentric, one submetacentric, and one satellited choromosome. C-banding patterns are characterized by one or two centromeric, or juxtacentromeric, small to larger bands in most chromosomes, by bands at the nucleolar organizers, by small or very small telomeric bands, and by the nearly complete lack of intercalary bands. Banding pattern polymorphism is widespread. Banding patterns supported by chromosome morphology enable identification of homologues, and discrimination between non-homologues inH. bulbosum (2x). The C-banded karyotype ofH. bulbosum (4x) supports an autopolyploid origin, but it was possible to identify only homologues of submetacentrics and SAT-chromosomes. |
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| Keywords: | Angiosperms Poaceae Hordeum bulbosum Cytotypes chromosome analysis Giemsa C-banding patterns autopolyploidy relationships |
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