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Comparative cytogenetics of two species of Dermanura (Chiroptera, Phyllostomidae) in Midwestern Brazil
Comparative Cytogenetics ( IF 1 ) Pub Date : 2021-04-02 , DOI: 10.3897/compcytogen.v15i2.60577
Ricardo Firmino de Sousa , Paulo Cesar Venere , Karina de Cassia Faria

Dermanura Gervais, 1856 is represented by small frugivorous bats of the Stenodermatinae subfamily. The taxonomy of this group presents controversies and has been subject to changes, especially since the morphological characters evaluated have left gaps that are difficult to fill regarding good species characterization. Previous studies performed in Dermanura cinerea Gervais, 1856 found that the karyotype of this species has a diploid number of chromosomes equal to 30 and 56 autosomal arms. The objective of the present study was to describe, for the first time, the karyotypes of the species Dermanura anderseni (Osgood, 1916) and Dermanura gnoma (Handley, 1987) based on classical cytogenetic markers. For both species, the diploid number found was 2n = 30 and NFa = 56. Two pairs of chromosomes showed markings of the nucleolus organizing regions (AgNORs) in the species D. anderseni and only one pair in D. gnoma, differing from what has already been described for D. cinerea. The two species analyzed here also showed differences in the sex chromosome system, with D. gnoma showing a neo-XY type system while in D. anderseni the classic XY sexual system was observed. In both species, visualization of the constitutive heterochromatin occurred in the pericentromeric region of all chromosomes, as well as in the short arms of the subtelocentric chromosomes. The present work represents an important expansion of karyotypic information for the subfamily Stenodermatinae, bringing chromosomal features that are possible to use in the taxonomic implications of the group.

中文翻译:

在巴西中西部的两种德曼努拉(Chiroptera,Phyllostomidae)的比较细胞遗传学。

Dermanura Gervais,1856年以Stenodermatinae亚科的小型节食蝙蝠为代表。该组的分类法存在争议,并且已经发生变化,尤其是由于评估的形态特征留下了难以填补的良好物种表征方面的空白。先前在1856年在灰皮果蝇(Dermanura cinerea Gervais)中进行的研究发现,该物种的核型具有等于30和56个常染色体臂的二倍体染色体数。本研究的目的是首次描述基于经典细胞遗传标记的Dermanura anderseni(Osgood,1916)和Dermanura gnoma(Handley,1987)的核型。对于这两个物种,发现的二倍体数为2n = 30,NFa = 56。两对染色体显示了D. anderseni物种中核仁组织区(AgNORs)的标记,而D. gnoma中只有一对,这与灰葡萄球菌的描述不同。此处分析的两个物种也显示出性染色体系统的差异,其中侏儒D. gnoma显示出新的XY型系统,而在D. anderseni中观察到了经典的XY性系统。在这两个物种中,组成型异染色质的可视化发生在所有染色体的着丝粒区域以及亚末中心染色体的短臂中。目前的工作代表了细皮亚科的核型信息的重要扩展,带来了可用于该组分类学意义的染色体特征。侏儒症,不同于已被描述为灰质D. cinerea。此处分析的两个物种也显示出性染色体系统的差异,其中侏儒D. gnoma显示出新的XY型系统,而在D. anderseni中观察到了经典的XY性系统。在这两个物种中,组成型异染色质的可视化发生在所有染色体的着丝粒区域以及亚末中心染色体的短臂中。目前的工作代表了细皮亚科的核型信息的重要扩展,带来了可用于该组分类学意义的染色体特征。侏儒,不同于已被描述为灰黄褐藻。此处分析的两个物种也显示出性染色体系统的差异,其中侏儒D. gnoma显示出新的XY型系统,而在D. anderseni中观察到了经典的XY性系统。在这两个物种中,组成型异染色质的可视化发生在所有染色体的着丝粒区域以及亚末中心染色体的短臂中。目前的工作代表了细皮亚科的核型信息的重要扩展,带来了可用于该组分类学意义的染色体特征。侏儒显示了新的XY型系统,而在D. anderseni中观察到了经典的XY性系统。在这两个物种中,组成型异染色质的可视化发生在所有染色体的着丝粒区域以及亚末中心染色体的短臂中。目前的工作代表了细皮亚科的核型信息的重要扩展,带来了可用于该组分类学意义的染色体特征。侏儒显示了新的XY型系统,而在D. anderseni中观察到了经典的XY性系统。在这两个物种中,组成型异染色质的可视化发生在所有染色体的着丝粒区域以及亚末中心染色体的短臂中。目前的工作代表了细皮亚科的核型信息的重要扩展,带来了可用于该组分类学意义的染色体特征。
更新日期:2021-04-02
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