Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae)
Penguins are classified in the order Sphenisciformes into a single family, Spheniscidae. The genus Pygoscelis Wagler, 1832, is composed of three species, Pygoscelis antarcticus Forster, 1781, P. papua Forster, 1781 and P. adeliae Hombron & Jacquinot, 1841. In this work, the objective was to desc...
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ftpensoft:10.3897/CompCytogen.v11i3.13795 2023-05-15T14:01:27+02:00 Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) Gunski,Ricardo Delgado Cañedo,Andrés Del Valle Garnero,Analía Ledesma,Mario Coria,Nestor Montalti,Diego Degrandi,Tiago 2017 text/html https://doi.org/10.3897/CompCytogen.v11i3.13795 https://compcytogen.pensoft.net/article/13795/ en eng Pensoft Publishers info:eu-repo/semantics/altIdentifier/eissn/1993-078X info:eu-repo/semantics/altIdentifier/pissn/1993-0771 info:eu-repo/semantics/openAccess Comparative Cytogenetics 11(3): 541-552 Sphenisciformes karyotype sex chromosomes evolution Research Article 2017 ftpensoft https://doi.org/10.3897/CompCytogen.v11i3.13795 2022-03-01T12:35:08Z Penguins are classified in the order Sphenisciformes into a single family, Spheniscidae. The genus Pygoscelis Wagler, 1832, is composed of three species, Pygoscelis antarcticus Forster, 1781, P. papua Forster, 1781 and P. adeliae Hombron & Jacquinot, 1841. In this work, the objective was to describe and to compare the karyotypes of Pygoscelis penguins contributing genetic information to Sphenisciformes. The metaphases were obtained by lymphocyte culture, and the diploid number and the C-banding pattern were determined. P. antarcticus has 2n = 92, P. papua 2n = 94 and P. adeliae exhibited 2n = 96 in males and 2n = 95 in females. The difference of diploid number in P. adeliae was identified as a multiple sex chromosome system where males have Z1Z1Z2Z2 and females Z1Z2W. The C-banding showed the presence of a heterochromatic block in the long arm of W chromosome and Z2 was almost entirely heterochromatic. The probable origin of a multiple system in P. adeliae was a translocation involving the W chromosome and the chromosome ancestral to Z2. The comparison made possible the identification of a high karyotype homology in Sphenisciformes which can be seen in the conservation of macrochromosomes and in the Z chromosome. The karyotypic divergences in Pygoscelis are restricted to the number of microchromosomes and W, which proved to be highly variable in size and morphology. The data presented in this work corroborate molecular phylogenetic proposals, supporting the monophyletic origin of penguins and intraspecific relations. Article in Journal/Newspaper Antarc* antarcticus Pensoft Publishers Hombron ENVELOPE(-58.650,-58.650,-63.450,-63.450) Jacquinot ENVELOPE(-57.867,-57.867,-63.350,-63.350) Long Arm ENVELOPE(-55.648,-55.648,49.517,49.517) Comparative Cytogenetics 11 3 541 552 |
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Pensoft Publishers |
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ftpensoft |
language |
English |
topic |
Sphenisciformes karyotype sex chromosomes evolution |
spellingShingle |
Sphenisciformes karyotype sex chromosomes evolution Gunski,Ricardo Delgado Cañedo,Andrés Del Valle Garnero,Analía Ledesma,Mario Coria,Nestor Montalti,Diego Degrandi,Tiago Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
topic_facet |
Sphenisciformes karyotype sex chromosomes evolution |
description |
Penguins are classified in the order Sphenisciformes into a single family, Spheniscidae. The genus Pygoscelis Wagler, 1832, is composed of three species, Pygoscelis antarcticus Forster, 1781, P. papua Forster, 1781 and P. adeliae Hombron & Jacquinot, 1841. In this work, the objective was to describe and to compare the karyotypes of Pygoscelis penguins contributing genetic information to Sphenisciformes. The metaphases were obtained by lymphocyte culture, and the diploid number and the C-banding pattern were determined. P. antarcticus has 2n = 92, P. papua 2n = 94 and P. adeliae exhibited 2n = 96 in males and 2n = 95 in females. The difference of diploid number in P. adeliae was identified as a multiple sex chromosome system where males have Z1Z1Z2Z2 and females Z1Z2W. The C-banding showed the presence of a heterochromatic block in the long arm of W chromosome and Z2 was almost entirely heterochromatic. The probable origin of a multiple system in P. adeliae was a translocation involving the W chromosome and the chromosome ancestral to Z2. The comparison made possible the identification of a high karyotype homology in Sphenisciformes which can be seen in the conservation of macrochromosomes and in the Z chromosome. The karyotypic divergences in Pygoscelis are restricted to the number of microchromosomes and W, which proved to be highly variable in size and morphology. The data presented in this work corroborate molecular phylogenetic proposals, supporting the monophyletic origin of penguins and intraspecific relations. |
format |
Article in Journal/Newspaper |
author |
Gunski,Ricardo Delgado Cañedo,Andrés Del Valle Garnero,Analía Ledesma,Mario Coria,Nestor Montalti,Diego Degrandi,Tiago |
author_facet |
Gunski,Ricardo Delgado Cañedo,Andrés Del Valle Garnero,Analía Ledesma,Mario Coria,Nestor Montalti,Diego Degrandi,Tiago |
author_sort |
Gunski,Ricardo |
title |
Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
title_short |
Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
title_full |
Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
title_fullStr |
Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
title_full_unstemmed |
Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
title_sort |
multiple sex chromosome system in penguins (pygoscelis, spheniscidae) |
publisher |
Pensoft Publishers |
publishDate |
2017 |
url |
https://doi.org/10.3897/CompCytogen.v11i3.13795 https://compcytogen.pensoft.net/article/13795/ |
long_lat |
ENVELOPE(-58.650,-58.650,-63.450,-63.450) ENVELOPE(-57.867,-57.867,-63.350,-63.350) ENVELOPE(-55.648,-55.648,49.517,49.517) |
geographic |
Hombron Jacquinot Long Arm |
geographic_facet |
Hombron Jacquinot Long Arm |
genre |
Antarc* antarcticus |
genre_facet |
Antarc* antarcticus |
op_source |
Comparative Cytogenetics 11(3): 541-552 |
op_relation |
info:eu-repo/semantics/altIdentifier/eissn/1993-078X info:eu-repo/semantics/altIdentifier/pissn/1993-0771 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3897/CompCytogen.v11i3.13795 |
container_title |
Comparative Cytogenetics |
container_volume |
11 |
container_issue |
3 |
container_start_page |
541 |
op_container_end_page |
552 |
_version_ |
1766271290034880512 |