Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)

Autores
Torgasheva, Anna A.; Savchenko, Ekaterina; Gomez Fernandez, Maria Jimena; Mirol, Patricia Monica; Borodin, Pavel M.
Año de publicación
2016
Idioma
ruso
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Tuco-tucos, South American rodents of the genus Ctenomys represent an interesting model of speciation. Their strict territorial and solitary life under the earth, vast but highly fragmented habitats, low migration activity were the causes of their very fast radiation. About 60 species of this genus have been described. They are found in a variety of habitats, from the mountains of the Andes to the coastal dunes of the Atlantic, from humid steppes of Pampas to dry deserts of Chaco. Tuco-tucos have a very high level of chromosomal polymorphism and polytypism based on Robertsonian and whole-arm reciprocal translocations and inversions, and can therefore be used to test different versions of chromosomal speciation hypothesis. The classic version of this hypothesis emphasizes the sterility of the hybrids, due to incorrect or incomplete chromosome synapsis in heterozygotes for rearrangements, germ cells death, chromosome nondisjunction and the generation of unbalanced gametes. The modern version of chromosomal speciation hypothesis suggests that the reduction of gene flow across chromosomal hybrid zones is due to the suppression of recombination in hybrids around the break points of rearrangements distinguishing the parental species. Field studies have not revealed strong negative effects of chromosomal heterozygosity on the fitness of the carriers. These results cast doubt on the validity of the classic version of the hypothesis. Analysis of chromosome behavior in the meiotic prophase in the chromosomal heterozygotes revealed significant changes in the frequency and distribution of recombination: crossingover suppression around the breakpoint and chiasma distalization. These changes can modulate the flow of genes between chromosomal races and amplify the divergence which has arisen due to spatial isolation. These data confirm the recombinational model of chromosomal speciation.
Fil: Torgasheva, Anna A.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; Rusia
Fil: Savchenko, Ekaterina. Institute of Cytology and Genetics; Rusia
Fil: Gomez Fernandez, Maria Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Mirol, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Borodin, Pavel M.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; Rusia
Materia
Speciation
Tuco-Tuco
Chromosomes
Immunolocalization
Meiosis
Recombination
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/49341

id CONICETDig_e6a8998434cc5391e6b4dcfc762967da
oai_identifier_str oai:ri.conicet.gov.ar:11336/49341
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)Хромосомы и видообразование у туко-туко (Ctenomys, Hystricognathi, Rodentia)Torgasheva, Anna A.Savchenko, EkaterinaGomez Fernandez, Maria JimenaMirol, Patricia MonicaBorodin, Pavel M.SpeciationTuco-TucoChromosomesImmunolocalizationMeiosisRecombinationhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Tuco-tucos, South American rodents of the genus Ctenomys represent an interesting model of speciation. Their strict territorial and solitary life under the earth, vast but highly fragmented habitats, low migration activity were the causes of their very fast radiation. About 60 species of this genus have been described. They are found in a variety of habitats, from the mountains of the Andes to the coastal dunes of the Atlantic, from humid steppes of Pampas to dry deserts of Chaco. Tuco-tucos have a very high level of chromosomal polymorphism and polytypism based on Robertsonian and whole-arm reciprocal translocations and inversions, and can therefore be used to test different versions of chromosomal speciation hypothesis. The classic version of this hypothesis emphasizes the sterility of the hybrids, due to incorrect or incomplete chromosome synapsis in heterozygotes for rearrangements, germ cells death, chromosome nondisjunction and the generation of unbalanced gametes. The modern version of chromosomal speciation hypothesis suggests that the reduction of gene flow across chromosomal hybrid zones is due to the suppression of recombination in hybrids around the break points of rearrangements distinguishing the parental species. Field studies have not revealed strong negative effects of chromosomal heterozygosity on the fitness of the carriers. These results cast doubt on the validity of the classic version of the hypothesis. Analysis of chromosome behavior in the meiotic prophase in the chromosomal heterozygotes revealed significant changes in the frequency and distribution of recombination: crossingover suppression around the breakpoint and chiasma distalization. These changes can modulate the flow of genes between chromosomal races and amplify the divergence which has arisen due to spatial isolation. These data confirm the recombinational model of chromosomal speciation.Fil: Torgasheva, Anna A.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; RusiaFil: Savchenko, Ekaterina. Institute of Cytology and Genetics; RusiaFil: Gomez Fernandez, Maria Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Mirol, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Borodin, Pavel M.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; RusiaInstitute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences2016-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/49341Torgasheva, Anna A.; Savchenko, Ekaterina; Gomez Fernandez, Maria Jimena; Mirol, Patricia Monica; Borodin, Pavel M.; Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia); Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences; Vavilov Journal of Genetics and Breeding; 20; 4; 9-2016; 408-4152500-04622500-3259CONICET DigitalCONICETrusinfo:eu-repo/semantics/altIdentifier/url/http://vavilov.elpub.ru/jour/article/view/693info:eu-repo/semantics/altIdentifier/doi/10.18699/VJ16.170info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:27Zoai:ri.conicet.gov.ar:11336/49341instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:45:27.812CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
Хромосомы и видообразование у туко-туко (Ctenomys, Hystricognathi, Rodentia)
title Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
spellingShingle Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
Torgasheva, Anna A.
Speciation
Tuco-Tuco
Chromosomes
Immunolocalization
Meiosis
Recombination
title_short Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
title_full Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
title_fullStr Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
title_full_unstemmed Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
title_sort Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)
dc.creator.none.fl_str_mv Torgasheva, Anna A.
Savchenko, Ekaterina
Gomez Fernandez, Maria Jimena
Mirol, Patricia Monica
Borodin, Pavel M.
author Torgasheva, Anna A.
author_facet Torgasheva, Anna A.
Savchenko, Ekaterina
Gomez Fernandez, Maria Jimena
Mirol, Patricia Monica
Borodin, Pavel M.
author_role author
author2 Savchenko, Ekaterina
Gomez Fernandez, Maria Jimena
Mirol, Patricia Monica
Borodin, Pavel M.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Speciation
Tuco-Tuco
Chromosomes
Immunolocalization
Meiosis
Recombination
topic Speciation
Tuco-Tuco
Chromosomes
Immunolocalization
Meiosis
Recombination
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Tuco-tucos, South American rodents of the genus Ctenomys represent an interesting model of speciation. Their strict territorial and solitary life under the earth, vast but highly fragmented habitats, low migration activity were the causes of their very fast radiation. About 60 species of this genus have been described. They are found in a variety of habitats, from the mountains of the Andes to the coastal dunes of the Atlantic, from humid steppes of Pampas to dry deserts of Chaco. Tuco-tucos have a very high level of chromosomal polymorphism and polytypism based on Robertsonian and whole-arm reciprocal translocations and inversions, and can therefore be used to test different versions of chromosomal speciation hypothesis. The classic version of this hypothesis emphasizes the sterility of the hybrids, due to incorrect or incomplete chromosome synapsis in heterozygotes for rearrangements, germ cells death, chromosome nondisjunction and the generation of unbalanced gametes. The modern version of chromosomal speciation hypothesis suggests that the reduction of gene flow across chromosomal hybrid zones is due to the suppression of recombination in hybrids around the break points of rearrangements distinguishing the parental species. Field studies have not revealed strong negative effects of chromosomal heterozygosity on the fitness of the carriers. These results cast doubt on the validity of the classic version of the hypothesis. Analysis of chromosome behavior in the meiotic prophase in the chromosomal heterozygotes revealed significant changes in the frequency and distribution of recombination: crossingover suppression around the breakpoint and chiasma distalization. These changes can modulate the flow of genes between chromosomal races and amplify the divergence which has arisen due to spatial isolation. These data confirm the recombinational model of chromosomal speciation.
Fil: Torgasheva, Anna A.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; Rusia
Fil: Savchenko, Ekaterina. Institute of Cytology and Genetics; Rusia
Fil: Gomez Fernandez, Maria Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Mirol, Patricia Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Borodin, Pavel M.. Novosibirsk State University; Rusia. Institute of Cytology and Genetics; Rusia
description Tuco-tucos, South American rodents of the genus Ctenomys represent an interesting model of speciation. Their strict territorial and solitary life under the earth, vast but highly fragmented habitats, low migration activity were the causes of their very fast radiation. About 60 species of this genus have been described. They are found in a variety of habitats, from the mountains of the Andes to the coastal dunes of the Atlantic, from humid steppes of Pampas to dry deserts of Chaco. Tuco-tucos have a very high level of chromosomal polymorphism and polytypism based on Robertsonian and whole-arm reciprocal translocations and inversions, and can therefore be used to test different versions of chromosomal speciation hypothesis. The classic version of this hypothesis emphasizes the sterility of the hybrids, due to incorrect or incomplete chromosome synapsis in heterozygotes for rearrangements, germ cells death, chromosome nondisjunction and the generation of unbalanced gametes. The modern version of chromosomal speciation hypothesis suggests that the reduction of gene flow across chromosomal hybrid zones is due to the suppression of recombination in hybrids around the break points of rearrangements distinguishing the parental species. Field studies have not revealed strong negative effects of chromosomal heterozygosity on the fitness of the carriers. These results cast doubt on the validity of the classic version of the hypothesis. Analysis of chromosome behavior in the meiotic prophase in the chromosomal heterozygotes revealed significant changes in the frequency and distribution of recombination: crossingover suppression around the breakpoint and chiasma distalization. These changes can modulate the flow of genes between chromosomal races and amplify the divergence which has arisen due to spatial isolation. These data confirm the recombinational model of chromosomal speciation.
publishDate 2016
dc.date.none.fl_str_mv 2016-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/49341
Torgasheva, Anna A.; Savchenko, Ekaterina; Gomez Fernandez, Maria Jimena; Mirol, Patricia Monica; Borodin, Pavel M.; Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia); Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences; Vavilov Journal of Genetics and Breeding; 20; 4; 9-2016; 408-415
2500-0462
2500-3259
CONICET Digital
CONICET
url http://hdl.handle.net/11336/49341
identifier_str_mv Torgasheva, Anna A.; Savchenko, Ekaterina; Gomez Fernandez, Maria Jimena; Mirol, Patricia Monica; Borodin, Pavel M.; Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia); Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences; Vavilov Journal of Genetics and Breeding; 20; 4; 9-2016; 408-415
2500-0462
2500-3259
CONICET Digital
CONICET
dc.language.none.fl_str_mv rus
language rus
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://vavilov.elpub.ru/jour/article/view/693
info:eu-repo/semantics/altIdentifier/doi/10.18699/VJ16.170
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences
publisher.none.fl_str_mv Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842268732709142528
score 13.13397