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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ftdoajarticles:oai:doaj.org/article:d7b50c18f6c44f4f9caf118e181aee46 2023-05-15T13:44:08+02:00 Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) Ricardo José Gunski Andrés Delgado Cañedo Analía Del Valle Garnero Mario Angel Ledesma Nestor Coria Diego Montalti Tiago Marafiga Degrandi 2017-08-01T00:00:00Z https://doi.org/10.3897/CompCytogen.v11i3.13795 https://doaj.org/article/d7b50c18f6c44f4f9caf118e181aee46 EN eng Pensoft Publishers https://compcytogen.pensoft.net/articles.php?id=13795 https://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=13795 https://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_xml&item_id=13795 https://doaj.org/toc/1993-0771 https://doaj.org/toc/1993-078X doi:10.3897/CompCytogen.v11i3.13795 1993-078X 1993-0771 https://doaj.org/article/d7b50c18f6c44f4f9caf118e181aee46 Comparative Cytogenetics, Vol 11, Iss 3, Pp 541-552 (2017) Genetics QH426-470 article 2017 ftdoajarticles https://doi.org/10.3897/CompCytogen.v11i3.13795 2022-12-31T11:48:18Z 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 Directory of Open Access Journals: DOAJ Articles 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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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Genetics QH426-470 |
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Genetics QH426-470 Ricardo José Gunski Andrés Delgado Cañedo Analía Del Valle Garnero Mario Angel Ledesma Nestor Coria Diego Montalti Tiago Marafiga Degrandi Multiple sex chromosome system in penguins (Pygoscelis, Spheniscidae) |
topic_facet |
Genetics QH426-470 |
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 |
Ricardo José Gunski Andrés Delgado Cañedo Analía Del Valle Garnero Mario Angel Ledesma Nestor Coria Diego Montalti Tiago Marafiga Degrandi |
author_facet |
Ricardo José Gunski Andrés Delgado Cañedo Analía Del Valle Garnero Mario Angel Ledesma Nestor Coria Diego Montalti Tiago Marafiga Degrandi |
author_sort |
Ricardo José Gunski |
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://doaj.org/article/d7b50c18f6c44f4f9caf118e181aee46 |
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, Vol 11, Iss 3, Pp 541-552 (2017) |
op_relation |
https://compcytogen.pensoft.net/articles.php?id=13795 https://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=13795 https://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_xml&item_id=13795 https://doaj.org/toc/1993-0771 https://doaj.org/toc/1993-078X doi:10.3897/CompCytogen.v11i3.13795 1993-078X 1993-0771 https://doaj.org/article/d7b50c18f6c44f4f9caf118e181aee46 |
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 |
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1766198067990626304 |