A monophyletic origin of the B chromosomes of Brachycome dichromosomatica (Asteraceae)

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dc.contributor.authorHouben, A.
dc.contributor.authorThompson, N.
dc.contributor.authorAhne, R.
dc.contributor.authorLeach, C.
dc.contributor.authorVerlin, D.
dc.contributor.authorTimmis, J.
dc.date.issued1999
dc.description.abstractThe 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.
dc.description.statementofresponsibilityHouben, Andreas ; Thompson, Nicole ; Ahne, Richard ; Leach, Carolyn ; Verlin, Dawn ; Timmis, Jeremy
dc.identifier.citationPlant Systematics and Evolution, 1999; 219(1):127-135
dc.identifier.doi10.1007/BF01090304
dc.identifier.issn0378-2697
dc.identifier.issn1615-6110
dc.identifier.urihttp://hdl.handle.net/2440/11500
dc.language.isoen
dc.publisherSPRINGER WIEN
dc.source.urihttps://doi.org/10.1007/bf01090304
dc.titleA monophyletic origin of the B chromosomes of Brachycome dichromosomatica (Asteraceae)
dc.typeJournal article
pubs.publication-statusPublished

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