High Levels of Chromosomal Differentiation in Euchroma gigantea L. 1735 (Coleoptera, Buprestidae).

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dc.contributorRita de Cássia de Moura, UFPE
dc.contributorNATONIEL FRANKLIN DE MELO, CPATSA
dc.contributorMaria José de Souza, UFPE.
dc.creatorMOURA, R. de C. de
dc.creatorMELO, N. F. de
dc.creatorSOUZA, M. J. de
dc.date2011-04-09T20:52:52Z
dc.date2011-04-09T20:52:52Z
dc.date2008-06-05
dc.date2008
dc.date2018-09-03T11:11:11Z
dc.date.accessioned2026-07-07T05:36:03Z
dc.descriptionEuchroma giganteawas karyotypically studied using conventional staining, C-banding, silver nitrate staining and ribosomal fluorescent in situ hybridization (rDNA FISH). Broad wide autosomal polymorphism and a complex sex determination system were found in this beetle. Karyotype complements ranging from 2n = 32, X1X2X3Y1Y2Y3 to 2n = 36,X1X2X3Y1Y2Y3 were detected in the sample analyzed. Punctiform suernumerary chromosomes were present in the different karyotypes. The karyotypic evolution of Brazilian E. giganteamay have taken two directions, reduction in the diploid number of 2n = 36 to 24 through centric fusions or 2n = 24 to 36 due to chromosomal fissions. In addition, pericentric inversions were also involved. The complex multiple sex mechanism of this species seems to be old and well established since it is found in specimens from different populations. Small pericentromeric blocks of constitutive heterochromatin were located on the autosomes and terminal blocks were also found on some small pairs. The sex chromosomes showed larger constitutive heterochromatin blocks. Silver nitrate staining during prophase I of meiosis showed labeling of the sex chromosome chain. However, the rDNA sites could only be precisely determined by FISH, which permitted the identification of these ribosomal sites on chromosomes X1 and X2 of this species.
dc.identifierGenetics and Molecular Biology, Ribeirão Preto, v. 31, n. 2, p. 431-437, 2008.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/162807
dc.identifier.urihttp://hdl.handle.net/123456789/496169
dc.languageeng
dc.rightsopenAccess
dc.subjectCromossomo
dc.subjectRON
dc.subjectDNAr
dc.subjectColeóptero
dc.titleHigh Levels of Chromosomal Differentiation in Euchroma gigantea L. 1735 (Coleoptera, Buprestidae).
dc.typeArtigo de periódico

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