Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil
The karyotypes of four species of freshwater triclads of the genus Girardia (Platyhelminthes), i.e. G. schubarti, G. tigrina, G. anderlani, and G. biapertura, from populations of different localities of the Rio Grande do Sul State, in southern Brazil, were analyzed. The karyotype of G. biapertura is...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Instituto Internacional de Ecologia
|
| Series: | Brazilian Journal of Biology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842007000500021&lng=en&tlng=en |
| _version_ | 1828286579394740224 |
|---|---|
| author | E. Benya AM. Leal-Zanchet WH. Santos J. Hauser B. Erdtmann |
| author_facet | E. Benya AM. Leal-Zanchet WH. Santos J. Hauser B. Erdtmann |
| author_sort | E. Benya |
| collection | DOAJ |
| description | The karyotypes of four species of freshwater triclads of the genus Girardia (Platyhelminthes), i.e. G. schubarti, G. tigrina, G. anderlani, and G. biapertura, from populations of different localities of the Rio Grande do Sul State, in southern Brazil, were analyzed. The karyotype of G. biapertura is presented for the first time. Three basic complements of 4, 8, and 9 chromosomes were found. Diploids, triploids, or mixoploids (2n/3n) specimens were frequently detected in these populations. The basic chromosomal complement of n = 9 was verified in two different species (G. biapertura and G. anderlani), presenting a large acrocentric chromosome which is rare in the family Dugesiidae. An intra and interspecific chromosomal variability was also detected and its evolutionary implications are discussed. |
| first_indexed | 2024-04-13T09:33:36Z |
| format | Article |
| id | doaj.art-c2301dd55a854a35901371a5c14b106c |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-04-13T09:33:36Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-c2301dd55a854a35901371a5c14b106c2022-12-22T02:52:09ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375674 suppl95195510.1590/S1519-69842007000500021S1519-69842007000500021Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern BrazilE. Benya0AM. Leal-Zanchet1WH. Santos2J. Hauser3B. Erdtmann4Universidade do Vale do Rio dos SinosUniversidade do Vale do Rio dos SinosUniversidade do Vale do Rio dos SinosUniversidade do Vale do Rio dos SinosUniversidade Federal do Rio Grande do SulThe karyotypes of four species of freshwater triclads of the genus Girardia (Platyhelminthes), i.e. G. schubarti, G. tigrina, G. anderlani, and G. biapertura, from populations of different localities of the Rio Grande do Sul State, in southern Brazil, were analyzed. The karyotype of G. biapertura is presented for the first time. Three basic complements of 4, 8, and 9 chromosomes were found. Diploids, triploids, or mixoploids (2n/3n) specimens were frequently detected in these populations. The basic chromosomal complement of n = 9 was verified in two different species (G. biapertura and G. anderlani), presenting a large acrocentric chromosome which is rare in the family Dugesiidae. An intra and interspecific chromosomal variability was also detected and its evolutionary implications are discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842007000500021&lng=en&tlng=enfreshwater planarianscytogeneticsgenetic plasticitychromosome variability |
| spellingShingle | E. Benya AM. Leal-Zanchet WH. Santos J. Hauser B. Erdtmann Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil Brazilian Journal of Biology freshwater planarians cytogenetics genetic plasticity chromosome variability |
| title | Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil |
| title_full | Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil |
| title_fullStr | Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil |
| title_full_unstemmed | Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil |
| title_short | Chromosome polymorphism and complements in populations of Girardia species (Platyhelminthes, Tricladida, Paludicola) from southern Brazil |
| title_sort | chromosome polymorphism and complements in populations of girardia species platyhelminthes tricladida paludicola from southern brazil |
| topic | freshwater planarians cytogenetics genetic plasticity chromosome variability |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842007000500021&lng=en&tlng=en |
| work_keys_str_mv | AT ebenya chromosomepolymorphismandcomplementsinpopulationsofgirardiaspeciesplatyhelminthestricladidapaludicolafromsouthernbrazil AT amlealzanchet chromosomepolymorphismandcomplementsinpopulationsofgirardiaspeciesplatyhelminthestricladidapaludicolafromsouthernbrazil AT whsantos chromosomepolymorphismandcomplementsinpopulationsofgirardiaspeciesplatyhelminthestricladidapaludicolafromsouthernbrazil AT jhauser chromosomepolymorphismandcomplementsinpopulationsofgirardiaspeciesplatyhelminthestricladidapaludicolafromsouthernbrazil AT berdtmann chromosomepolymorphismandcomplementsinpopulationsofgirardiaspeciesplatyhelminthestricladidapaludicolafromsouthernbrazil |