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

IF 2.1 4区生物学 Q2 Agricultural and Biological Sciences Caryologia Pub Date : 2021-07-20 DOI:10.36253/CARYOLOGIA-839

A. Costa, Cassiane Furlan Lopes, Marcelo Santos de Souza, S. A. Barcellos, Pâmela Giordani Vielmo, R. J. Gunski, A. D. Garnero

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引用次数: 1

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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三种林莺(雀鸟:雀形目:林莺科)的细胞遗传学比较揭示了其W染色体的不同带型和颜色异质性

染色体重排是物种进化过程中的一个重要过程。假设这些重排发生在重复序列和异色区附近。鸟类核型具有不同的染色体带型，已被用作系统发育研究的参数。尽管该类群的物种多样性很高，但细胞遗传学分析的数量不超过12%，而且Parulidae家族在这些研究中的代表性极低。本研究的目的是检测3种林莺(myiothlyypis leucoblephara, Basileuterus culicivorus和Setophaga pitiayumi)的独立或同时染色体重排，并分析染色体带带的收敛性和差异性。我们的cbg波段结果显示，在三个被研究的物种中有一个不寻常的W性染色体，包含一个端粒共染区。GTG和RBG带确定了参与重排的大染色体中的特定区域。细胞遗传学数据证实了该群体核型中物种形成过程的鉴定。

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来源期刊

Caryologia 生物-遗传学

CiteScore

1.60

自引率

23.80%

发文量

审稿时长

12 months

期刊介绍： Caryologia is devoted to the publication of original papers, and occasionally of reviews, about plant, animal and human karyological, cytological, cytogenetic, embryological and ultrastructural studies. Articles about the structure, the organization and the biological events relating to DNA and chromatin organization in eukaryotic cells are considered. Caryologia has a strong tradition in plant and animal cytosystematics and in cytotoxicology. Bioinformatics articles may be considered, but only if they have an emphasis on the relationship between the nucleus and cytoplasm and/or the structural organization of the eukaryotic cell.