New Karyotype Information for Ctenomys (Rodentia: Ctenomyidae) from Midwest and Northern Brazil.

IF 1.7 4区 生物学 Q4 CELL BIOLOGY
Cytogenetic and Genome Research Pub Date : 2024-01-01 Epub Date: 2024-02-23 DOI:10.1159/000538014
Thays Duarte de Oliveira, Natasha A Bertocchi, Bruno Busnello Kubiak, Daniel Galiano, Sérgio Luiz Althoff, Thales R O de Freitas
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引用次数: 0

Abstract

Introduction: Its wide karyotypic variation characterizes the genus Ctenomys, and in Brazil, the genus is distributed in the country's southern, Midwest, and northern regions. Recently, populations of Ctenomys have been found in the Midwest and northern Brazil, with two new lineages named C. sp. "xingu" and C. sp. "central."

Methods: This work combines classical cytogenetic and molecular analyses to provide new chromosomal information on the boliviensis group distributed in northern and Midwestern Brazil. This includes the validation of the karyotype of C. bicolor and C. nattereri and the description of the karyotype of C. sp. "xingu" and C. sp. "central."

Results: We found three different karyotypes: 2n = 40 for C. bicolor; 2n = 36 for C. nattereri, and specimens from a locality belonging to C. sp. "central"; 2n = 34 for the lineage C. sp. "xingu" and specimens from a locality belonging to C. sp. "central." Furthermore, GTG banding revealed homologous chromosomes between species/lineages and allowed the identification of the rearrangements that occurred, which proved the occurrence of fissions.

Conclusion: Considering our results on the variation of 2n in the boliviensis group, we found two possibilities: the first, deduced by parsimony, is that 2n = 36 appeared initially, and two fissions produced gave rise to 2n = 40, and an independent fusion gave rise to 2n = 34 from 2n = 36; moreover, the second explanation is that all karyotypes arose independently.

来自巴西中西部和北部的栉水母(啮齿目:栉水母科)的新核型信息。
栉水母属的核型变异很大,在巴西,该属分布于该国的南部、中西部和北部地区。最近,在巴西中西部和北部发现了栉水母种群,其中有两个新的品系,分别被命名为 "新古 "栉水母和 "中部 "栉水母。这项工作结合了经典的细胞遗传学和分子分析,为分布在巴西北部和中西部的 Boliviensis 群提供了新的染色体信息。这包括验证 C. bicolor 和 C. nattereri 的核型,以及描述 C. sp. "xingu "和 C. sp. "central "的核型。我们发现了三种不同的核型:C. bicolor 的核型为 2n=40;C. nattereri 的核型为 2n=36,其标本来自属于 C. sp. "中央 "的地点;C. sp. "xingu "系的核型为 2n=34,其标本来自属于 C. sp. "中央 "的地点。此外,GTG 带显示了物种/品系之间的同源染色体,并可确定发生的重排,这证明发生了裂殖。考虑到我们对 Boliviensis 群体中 2n 变异的研究结果,我们发现了两种可能性:第一种可能性是,根据解析法推断,2n=36 最初出现,两次裂变产生了 2n=40,而一次独立的融合又从 2n=36 产生了 2n=34;此外,第二种解释是,所有核型都是独立产生的。
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来源期刊
Cytogenetic and Genome Research
Cytogenetic and Genome Research 生物-细胞生物学
CiteScore
3.10
自引率
5.90%
发文量
25
审稿时长
1 months
期刊介绍: During the last decades, ''Cytogenetic and Genome Research'' has been the leading forum for original reports and reviews in human and animal cytogenetics, including molecular, clinical and comparative cytogenetics. In recent years, most of its papers have centered on genome research, including gene cloning and sequencing, gene mapping, gene regulation and expression, cancer genetics, comparative genetics, gene linkage and related areas. The journal also publishes key papers on chromosome aberrations in somatic, meiotic and malignant cells. Its scope has expanded to include studies on invertebrate and plant cytogenetics and genomics. Also featured are the vast majority of the reports of the International Workshops on Human Chromosome Mapping, the reports of international human and animal chromosome nomenclature committees, and proceedings of the American and European cytogenetic conferences and other events. In addition to regular issues, the journal has been publishing since 2002 a series of topical issues on a broad variety of themes from cytogenetic and genome research.
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