Appearance of aneuploidy in the germ and somatic lines is usually associated with chromosome and genome rearrangements leading to polysomies and cancer. However, aneuploidy plays an important role in chromosome evolution and in the regulation of the ontogenetic development and phenotypic expression. The latter is known as chromosome diminutions. In Oligochaeta (mainly family Naididae but also Lumbricidae, Erpobdellidae and Branchiobdellidae), we have equated the variability of the chromosome count numbers with aneuploidy based on the results of our analyses and identified chromosome-like nondisjunctions as a major mechanism responsible for it. Another author detected Robertsonian-like translocations producing aneuploidy in Eisenia fetida (Lumbricidae, Oligochaeta). Our observations, nevertheless, show that, among karyotyped haploid/diploid cells, the most frequent were haploid (1n) or diploid (2n) chromosome counts connected by multiples. The number of aneuploidy counts was decreasing with the increase of x in expressions 1n + x/1n – x or 2n + x/2n – x. Noteworthy is that not all frequencies of chromosomes in a pair have the same probability. For example, odd aneuploidy numbers of chromosomes are significantly less frequent than the even ones. The wide spread of aneuploidy among Oligochaeta supports the punctuated equilibria model of evolution.
| Published in | Ecology and Evolutionary Biology (Volume 1, Issue 3) |
| DOI | 10.11648/j.eeb.20160103.13 |
| Page(s) | 57-63 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2024. Published by Science Publishing Group |
Oligochaeta, Earthworm, Aneuploidy, Evolution, Macroevolution, Microevolution
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APA Style
Tomáš Pavlíček, Tova Cohen, Shweta Yadav, Michèle Glasstetter, Petr Král, et al. (2016). Aneuploidy Occurrence in Oligochaeta. Ecology and Evolutionary Biology, 1(3), 57-63. https://doi.org/10.11648/j.eeb.20160103.13
ACS Style
Tomáš Pavlíček; Tova Cohen; Shweta Yadav; Michèle Glasstetter; Petr Král, et al. Aneuploidy Occurrence in Oligochaeta. Ecol. Evol. Biol. 2016, 1(3), 57-63. doi: 10.11648/j.eeb.20160103.13
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Download@article{10.11648/j.eeb.20160103.13,
author = {Tomáš Pavlíček and Tova Cohen and Shweta Yadav and Michèle Glasstetter and Petr Král and Oren Pearlson},
title = {Aneuploidy Occurrence in Oligochaeta},
journal = {Ecology and Evolutionary Biology},
volume = {1},
number = {3},
pages = {57-63},
doi = {10.11648/j.eeb.20160103.13},
url = {https://doi.org/10.11648/j.eeb.20160103.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.eeb.20160103.13},
abstract = {Appearance of aneuploidy in the germ and somatic lines is usually associated with chromosome and genome rearrangements leading to polysomies and cancer. However, aneuploidy plays an important role in chromosome evolution and in the regulation of the ontogenetic development and phenotypic expression. The latter is known as chromosome diminutions. In Oligochaeta (mainly family Naididae but also Lumbricidae, Erpobdellidae and Branchiobdellidae), we have equated the variability of the chromosome count numbers with aneuploidy based on the results of our analyses and identified chromosome-like nondisjunctions as a major mechanism responsible for it. Another author detected Robertsonian-like translocations producing aneuploidy in Eisenia fetida (Lumbricidae, Oligochaeta). Our observations, nevertheless, show that, among karyotyped haploid/diploid cells, the most frequent were haploid (1n) or diploid (2n) chromosome counts connected by multiples. The number of aneuploidy counts was decreasing with the increase of x in expressions 1n + x/1n – x or 2n + x/2n – x. Noteworthy is that not all frequencies of chromosomes in a pair have the same probability. For example, odd aneuploidy numbers of chromosomes are significantly less frequent than the even ones. The wide spread of aneuploidy among Oligochaeta supports the punctuated equilibria model of evolution.},
year = {2016}
}
TY - JOUR T1 - Aneuploidy Occurrence in Oligochaeta AU - Tomáš Pavlíček AU - Tova Cohen AU - Shweta Yadav AU - Michèle Glasstetter AU - Petr Král AU - Oren Pearlson Y1 - 2016/12/02 PY - 2016 N1 - https://doi.org/10.11648/j.eeb.20160103.13 DO - 10.11648/j.eeb.20160103.13 T2 - Ecology and Evolutionary Biology JF - Ecology and Evolutionary Biology JO - Ecology and Evolutionary Biology SP - 57 EP - 63 PB - Science Publishing Group SN - 2575-3762 UR - https://doi.org/10.11648/j.eeb.20160103.13 AB - Appearance of aneuploidy in the germ and somatic lines is usually associated with chromosome and genome rearrangements leading to polysomies and cancer. However, aneuploidy plays an important role in chromosome evolution and in the regulation of the ontogenetic development and phenotypic expression. The latter is known as chromosome diminutions. In Oligochaeta (mainly family Naididae but also Lumbricidae, Erpobdellidae and Branchiobdellidae), we have equated the variability of the chromosome count numbers with aneuploidy based on the results of our analyses and identified chromosome-like nondisjunctions as a major mechanism responsible for it. Another author detected Robertsonian-like translocations producing aneuploidy in Eisenia fetida (Lumbricidae, Oligochaeta). Our observations, nevertheless, show that, among karyotyped haploid/diploid cells, the most frequent were haploid (1n) or diploid (2n) chromosome counts connected by multiples. The number of aneuploidy counts was decreasing with the increase of x in expressions 1n + x/1n – x or 2n + x/2n – x. Noteworthy is that not all frequencies of chromosomes in a pair have the same probability. For example, odd aneuploidy numbers of chromosomes are significantly less frequent than the even ones. The wide spread of aneuploidy among Oligochaeta supports the punctuated equilibria model of evolution. VL - 1 IS - 3 ER -
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