Cytogenetic characterization of Aloysia virgata Ruiz and Pavan (Verbenaceae)

Autor(es)

Brandao, Aline Dias ^[1] ; Viccini, Lyderson Facio ^[2] ; Recco-Pimentel, Shirlei Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Biol Celular, Inst Biol, BR-13083863 Campinas, SP - Brazil

^[2] Univ Fed Juiz de Fora, Inst Ciencias Biol, Dept Biol, BR-36036330 Juiz De Fora, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 52, n. 4, p. 893-899, JUL-AUG 2009.
• Citações Web of Science: 0

Resumo

Since previous cytogenetic reports of Aloysia have only described the meiotic behavior and chromosomal number of some species, the aim of this work was to provide detailed cytogenetic description of Aloysia virgata that would contribute to the understanding of the taxonomical organization of the Verbenaceae. Aloysia virgata had a karyotype with 2n = 36 metacentric chromosomes, all with similar size. The large amount of heterochromatin seen after Giemsa staining was confirmed by C-banding. Four nucleolar organizer regions (NORs) were detected with an rDNA 45S probe in two homologous pairs and two sites of 5S rDNA located on one chromosomal pair were detected by fluorescence in situ hybridization. The interphase nucleus was classified as semi-reticulate. Meiotic analysis showed a normal chromosomal behavior, with 18 bivalents in some parts of prophase I and in metaphase I. The number of chromosomes, NORs and 5S rDNA segments did not exclude a possible polyploid origin. (AU)

• Processo FAPESP: 00/11842-2 - Citogenética comparativa de espécies dos gêneros Lippia, Aloysia e Lantana (Verbenaceae, Lamiales)
• Beneficiário: Aline Dias Brandão
• Modalidade de apoio: Bolsas no Brasil - Mestrado