Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe
For studying meiosis in males, large samples of Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) were collected in Norway, Sweden, Finland and northwest Russia. In addition to all-female populations, males were present in 10 out of 47 populations; still, all populations were highly female-b...
Published in: | Comparative Cytogenetics |
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Online Access: | https://zenodo.org/record/575426 https://doi.org/10.3897/compcytogen.v7i3.6126 |
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ftzenodo:oai:zenodo.org:575426 2023-05-15T17:43:27+02:00 Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe Nokkala, Christina Nokkala, Seppo Kuznetsova, Valentina 2013-09-30 https://zenodo.org/record/575426 https://doi.org/10.3897/compcytogen.v7i3.6126 unknown https://zenodo.org/communities/biosyslit https://zenodo.org/record/575426 https://doi.org/10.3897/compcytogen.v7i3.6126 oai:zenodo.org:575426 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Comparative Cytogenetics 7((3)) 241-251 Cacopsylla myrtilli parthenogenesis spanandric males asynaptic meiosis nonfunctional males info:eu-repo/semantics/article publication-article 2013 ftzenodo https://doi.org/10.3897/compcytogen.v7i3.6126 2023-03-10T21:55:03Z For studying meiosis in males, large samples of Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) were collected in Norway, Sweden, Finland and northwest Russia. In addition to all-female populations, males were present in 10 out of 47 populations; still, all populations were highly female-biased, the proportion of males varying from 0.1% to 9.1%. These males are thus rare or so-called spanandric males. Males in northern Norway, Finland and northwest Russia showed normal chiasmate meiosis, while complete absence of chiasmata due to asynapsis was found in males collected in Norway and northern Sweden. In asynaptic meiosis, all univalent chromosomes divided during the first meiotic division resulting in incomplete second meiotic division and formation of diploid sperms. Hence, males in these populations are nonfunctional and do not contribute to the genetic constitution of the population, but appear in every generation as reversals from apomictic parthenogenesis and the mode of parthenogenesis is of obligatory type. Article in Journal/Newspaper Northern Norway Northern Sweden Northwest Russia Zenodo Norway Comparative Cytogenetics 7 3 241 251 |
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Cacopsylla myrtilli parthenogenesis spanandric males asynaptic meiosis nonfunctional males |
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Cacopsylla myrtilli parthenogenesis spanandric males asynaptic meiosis nonfunctional males Nokkala, Christina Nokkala, Seppo Kuznetsova, Valentina Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
topic_facet |
Cacopsylla myrtilli parthenogenesis spanandric males asynaptic meiosis nonfunctional males |
description |
For studying meiosis in males, large samples of Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) were collected in Norway, Sweden, Finland and northwest Russia. In addition to all-female populations, males were present in 10 out of 47 populations; still, all populations were highly female-biased, the proportion of males varying from 0.1% to 9.1%. These males are thus rare or so-called spanandric males. Males in northern Norway, Finland and northwest Russia showed normal chiasmate meiosis, while complete absence of chiasmata due to asynapsis was found in males collected in Norway and northern Sweden. In asynaptic meiosis, all univalent chromosomes divided during the first meiotic division resulting in incomplete second meiotic division and formation of diploid sperms. Hence, males in these populations are nonfunctional and do not contribute to the genetic constitution of the population, but appear in every generation as reversals from apomictic parthenogenesis and the mode of parthenogenesis is of obligatory type. |
format |
Article in Journal/Newspaper |
author |
Nokkala, Christina Nokkala, Seppo Kuznetsova, Valentina |
author_facet |
Nokkala, Christina Nokkala, Seppo Kuznetsova, Valentina |
author_sort |
Nokkala, Christina |
title |
Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
title_short |
Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
title_full |
Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
title_fullStr |
Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
title_full_unstemmed |
Meiosis in rare males in parthenogenetic Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) populations from northern Europe |
title_sort |
meiosis in rare males in parthenogenetic cacopsylla myrtilli (wagner, 1947) (hemiptera, psyllidae) populations from northern europe |
publishDate |
2013 |
url |
https://zenodo.org/record/575426 https://doi.org/10.3897/compcytogen.v7i3.6126 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway Northern Sweden Northwest Russia |
genre_facet |
Northern Norway Northern Sweden Northwest Russia |
op_source |
Comparative Cytogenetics 7((3)) 241-251 |
op_relation |
https://zenodo.org/communities/biosyslit https://zenodo.org/record/575426 https://doi.org/10.3897/compcytogen.v7i3.6126 oai:zenodo.org:575426 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3897/compcytogen.v7i3.6126 |
container_title |
Comparative Cytogenetics |
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7 |
container_issue |
3 |
container_start_page |
241 |
op_container_end_page |
251 |
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1766145537388576768 |