You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Integration of a B Chromosome into the A Genome of a Wasp, Revisited
S. M. S. R. Araújo, S. G. Pompolo, F. Perfectti and J. P. M. Camacho
Proceedings: Biological Sciences
Vol. 269, No. 1499 (Jul. 22, 2002), pp. 1475-1478
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/3068119
Page Count: 4
You can always find the topics here!Topics: Chromosomes, Genomes, Haploidy, Acrocentric chromosomes, Population growth, Metagenomics, Mosaic, Population dynamics, Population parameters, Female animals
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
A previous study showed that in the haplodiploid solitary wasp Trypoxylon albitarse, most individuals carry one B chromosome per haploid genome, the same dosage as the standard (A) chromosomes, indicating a possible regularization of B-chromosome meiotic behaviour and its integration into the A genome. In a new sampling, we have analysed 15 populations (including 9 out of the 10 previously analysed) to test the evolution of this integration process. The new results provide a direct report of the invasion process in the Porto Firme population, where B frequency has dramatically increased in only four generations. In the populations from the Viçosa region, however, B frequency has remained stable, although the principal B type, the metacentric one, has increased in frequency at the expense of the acrocentric one in several populations. The implications of these new results on the hypothesis of the integration of these B chromosomes, as regular members of the A genome, are discussed.
Proceedings: Biological Sciences © 2002 Royal Society