Adelaide Research & Scholarship
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https://hdl.handle.net/2440/11500
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| Type: | Journal article |
| Title: | A monophyletic origin of the B chromosomes of Brachycome dichromosomatica (Asteraceae) |
| Author: | Houben, A. Thompson, N. Ahne, R. Leach, C. Verlin, D. Timmis, J. |
| Citation: | Plant Systematics and Evolution, 1999; 219(1):127-135 |
| Publisher: | SPRINGER WIEN |
| Issue Date: | 1999 |
| ISSN: | 0378-2697 1615-6110 |
| Statement of Responsibility: | Houben, Andreas ; Thompson, Nicole ; Ahne, Richard ; Leach, Carolyn ; Verlin, Dawn ; Timmis, Jeremy |
| Abstract: | The A and B chromosomes of different karyotype variants(cytodemes A1, A2, A3 and A4) of Brachycome dichromosomatica were analysed by computer-aided chromosome image analysis and fluorescence in situ hybridisation (FISH). Ribosomal DNA and the B chromosome-specific sequence Bd49 were detected on all B chromosomes. In addition to minor size variation of the Bs, polymorphism of the rDNA and Bd49 position and copy number revealed two major types of B chromosomes. The B chromosomes of all the cytodemes were indistinguishable from each other in length, but that of A3 showed evidence of rearrangements consistent with its long-term geographic isolation. The results presented suggest a monophyletic origin of the B chromosomes of B. dichromosomatica. |
| DOI: | 10.1007/BF01090304 |
| Published version: | http://dx.doi.org/10.1007/bf01090304 |
| Appears in Collections: | Aurora harvest 2 Genetics publications |
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