Abstract.
Dot-like micro B chromosomes of Brachycome dichromosomatica were analysed for their sequence composition. Southern hybridization patterns of a total micro B probe to genomic DNA from plants with and without micro Bs demonstrated that the micro Bs shared sequences with the A chromosomes. In addition to telomere, rDNA and common A and B chromosome sequences, a new B-specific, highly methylated tandem repeat (Bdm29) was detected. After in situ hybridization with Bdm29 the entire micro B chromosome was labelled and clustering of the condensed micro Bs could be observed at interphase. A high number of Bdm29-like sequences were also found in the larger B chromosomes of B. dichromosomatica and in other Bs within the genus Brachycome.
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Received: 30 May 1997; in revised form: 20 August 1997 / Accepted: 20 August 1997
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Houben, A., Leach, C., Verlin, D. et al. A repetitive DNA sequence common to the different B chromosomes of the genus Brachycome . Chromosoma 106, 513–519 (1997). https://doi.org/10.1007/PL00007689
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DOI: https://doi.org/10.1007/PL00007689