Giemsa C-banding Karyotypes of Two Subspecies of Hordeum brevisubulatum from China

Ib Linde-Laursen, R. Bothmer

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    C-banding patterns ofH. brevisubulatum subsp.brevisubulatum (2x) and subsp.turkestanicum (4x) had conspicuous telomeric C-bands in at least one chromosome arm with a minor difference in average band size between subspecies. Other conspicuous bands were few in number as in other taxa of the species complex. The C-banded area of the chromosomes was estimated to be 7 to 8 and 6 per cent, respectively. C-banding- and SAT-chromosome polymorphisms were observed in both subspecies. The latter and previous observations indicate that the number of SAT-chromosomes is a less reliable diagnostic character. Nucleolar organizer region polymorphisms were demonstrated through silver nitrate staining of nucleoli. C-banding patterns corroborated that tetra- and hexaploid cytotypes of subsp.turkestanicum form an autopolyploid series. Reliable identification ofH. brevisubulatum taxa based on cytological criteria should include the simultaneous use of C-banding patterns, and number and morphology of marker chromosomes.
    Original languageEnglish
    JournalPlant Systematics and Evolution
    Issue number3-4
    Pages (from-to)259-267
    Publication statusPublished - 1984


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