Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/195098
Type: Artigo de periódico
Title: Integration Of A B Chromosome Into The A Genome Of A Wasp, Revisited.
Author: Araújo, S M S R
Pompolo, S G
Perfectti, F
Camacho, J P M
Abstract: 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.
Subject: Animals
Brazil
Chromosomes
Evolution, Molecular
Female
Genetics, Population
Genome
Male
Meiosis
Ploidies
Wasps
Rights: fechado
Identifier DOI: 10.1098/rspb.2002.2040
Address: http://www.ncbi.nlm.nih.gov/pubmed/12137577
Date Issue: 2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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