Open AccessComparative cytogenetics in three species of Wood-Warblers (Aves: Passeriformes: Parulidae) reveal divergent banding patterns and chromatic heterogeneity for the W chromosome
Author(s) -
Alice Lemos Costa,
Cassiane Furlan Lopes,
Marcelo Santos de Souza,
Suziane Alves Barcellos,
Pâmela Giordani Vielmo,
Ricardo José Gunski,
Analía Del Valle Garnero
Publication year - 2021
Publication title -
caryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.319
H-Index - 29
eISSN - 2165-5391
pISSN - 0008-7114
DOI - 10.36253/caryologia-839
Subject(s) - biology , karyotype , heterochromatin , microchromosome , evolutionary biology , chromosome , euchromatin , cytogenetics , genetics , phylogenetic tree , chromosomal rearrangement , g banding , gene
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.