Comparative cytogenetics in three species of Wood-Warblers (Aves: Passeriformes: Parulidae) reveal divergent banding patterns and chromatic heterogeneity for the W chromosome

Authors

  • Alice Lemos Costa Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Cassiane Furlan Lopes Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Marcelo Santos de Souza Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Suziane Alves Barcellos Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Pâmela Giordani Vielmo Laboratório de Diversidade Genética Animal, Curso de Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Ricardo José Gunski Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil
  • Analía Del Valle Garnero Laboratório de Diversidade Genética Animal, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Rio Grande do Sul, Brazil

DOI:

https://doi.org/10.36253/caryologia-839

Keywords:

chromosomal evolution, karyotype, diploid number, chromosomal banding, constitutive heterochromatin

Abstract

Chromosomal rearrangements are an important process in the evolution of species. It is assumed that these rearrangements occur near repetitive sequences and heterochromatic regions. Avian karyotypes have diverse chromosomal band patterns and have been used as the parameters for phylogenetic studies. Although the group has a high diversity of species, no more than 12% has been analyzed cytogenetically, and the Parulidae family are extremely underrepresented in these studies. The aim of this study was to detect independent or simultaneous chromosomal rearrangements, and also to analyze chromosomal banding convergences and divergences of three Wood-Warblers species (Myiothlypis leucoblephara, Basileuterus culicivorus, and Setophaga pitiayumi). Our CBG-band results reveal an unusual W sex chromosome in the three studied species, containing a telomeric euchromatic region. The GTG and RBG bands identify specific regions in the macrochromosomes involved in the rearrangements. Cytogenetic data confirm the identification of speciation processes at the karyotypic of this group.

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Published

2021-07-20

How to Cite

Lemos Costa, A., Furlan Lopes, C., Santos de Souza, M., Alves Barcellos, S., Giordani Vielmo, P., José Gunski, R., & Del Valle Garnero, A. (2021). Comparative cytogenetics in three species of Wood-Warblers (Aves: Passeriformes: Parulidae) reveal divergent banding patterns and chromatic heterogeneity for the W chromosome. Caryologia, 74(1), 43–51. https://doi.org/10.36253/caryologia-839

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