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Type: Artigo de periódico
Title: Integration of a B chromosome into the A genome of a wasp, revisited
Author: Araujo, SMSR
Pompolo, SG
Perfectti, F
Camacho, JPM
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 Viqosa 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: B-chromosome frequency
population dynamics
Trypoxylon albitarse
meiotic behaviour
Country: Inglaterra
Editor: Royal Soc
Citation: Proceedings Of The Royal Society B-biological Sciences. Royal Soc, v. 269, n. 1499, n. 1475, n. 1478, 2002.
Rights: fechado
Identifier DOI: 10.1098/rspb.2002.2040
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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