Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae)

C. P. Targueta; M. Rivera; L. B. Lourenço

doi:10.1007/s10709-012-9636-y

Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae)

C. P. Targueta
, M. Rivera
, L. B. Lourenço

Faculty of Exact and Natural Sciences

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n = 22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n = 20. To investigate if 2n = 20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n = 20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n = 22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops.

Original language	English
Pages (from-to)	1339-1347
Number of pages	9
Journal	Genetica
Volume	139
Issue number	10
DOIs	https://doi.org/10.1007/s10709-012-9636-y
State	Published - Oct 2011

Funding

Acknowledgments The authors gratefully acknowledge Dr. Santiago R. Ron for identification of the specimens, and Diego Almeida Reinoso, Margarita Baquero, and Ailin Blasco for helping in the field work. This work was supported by the Brazilian agencies FAPESP (Fundac¸ão de Amparo à Pesquisa do Estado de São Paulo) and Capes (Coordenac¸ão de Aperfeic¸oamento de Pessoal de Nível Superior), and the Ecuadorian agencies SENESCYT (Secretaría Nacional de Edu-cación Superior, Ciencia, Tecnología y Innovación and PUCE (Pon-tificia Universidad Católica del Ecuador).

Funders
Fundação de Amparo à Pesquisa do Estado de São Paulo
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Secretaría de Educación Superior, Ciencia, Tecnología e Innovación
Secretaría Nacional de Ciencia, Tecnología e Innovación
Pontifical Catholic University of Ecuador

Keywords

Anuran cytogenetics
Chromosome
Engystomops
Polyploidy
Sex chromosomes

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title = "Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae)",

abstract = "The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n = 22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n = 20. To investigate if 2n = 20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n = 20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n = 22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops.",

keywords = "Anuran cytogenetics, Chromosome, Engystomops, Polyploidy, Sex chromosomes",

author = "Targueta, \{C. P.\} and M. Rivera and Louren{\c c}o, \{L. B.\}",

year = "2011",

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doi = "10.1007/s10709-012-9636-y",

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AU - Rivera, M.

AU - Lourenço, L. B.

PY - 2011/10

Y1 - 2011/10

N2 - The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n = 22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n = 20. To investigate if 2n = 20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n = 20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n = 22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops.

AB - The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n = 22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n = 20. To investigate if 2n = 20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n = 20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n = 22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops.

KW - Anuran cytogenetics

KW - Chromosome

KW - Engystomops

KW - Polyploidy

KW - Sex chromosomes

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ER -

Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae)

Abstract

Funding

Keywords

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