Innate and acquired variation of nuclear DNA contents of marine copepods
Feulgen staining revealed significant geographical differences in mean DNA contents of somatic nuclei of adult female Calanus glacialis and Pseudocalanus acuspes from the Canadian arctic and Nova Scotia; the latter exhibited seasonal differences near Halifax in 1987 but not 1989–1990. Female P. elon...
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1992
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crcansciencepubl:10.1139/g92-090 2024-09-15T18:00:43+00:00 Innate and acquired variation of nuclear DNA contents of marine copepods Escribano, Ruben McLaren, Ian A. Breteler, W. C. M. Klein 1992 http://dx.doi.org/10.1139/g92-090 http://www.nrcresearchpress.com/doi/pdf/10.1139/g92-090 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Genome volume 35, issue 4, page 602-610 ISSN 0831-2796 1480-3321 journal-article 1992 crcansciencepubl https://doi.org/10.1139/g92-090 2024-07-11T04:12:00Z Feulgen staining revealed significant geographical differences in mean DNA contents of somatic nuclei of adult female Calanus glacialis and Pseudocalanus acuspes from the Canadian arctic and Nova Scotia; the latter exhibited seasonal differences near Halifax in 1987 but not 1989–1990. Female P. elongatus reared for 96 generations in the laboratory had significantly less DNA per nucleus than did first-generation females from the same North Sea wild stock. Nuclei of C. glacialis reared from juvenile stages (copepodid III) in four food–temperature treatments had significantly more DNA at high food and low temperature. There were also significant treatment effects in P. elongatus and P. acuspes reared from egg to adult. There were always significant differences in DNA contents among females within samples and treatments. Increased variance among nuclei within individual C. glacialis may have resulted from suboptimal laboratory conditions. Body lengths in rearing experiments were positively correlated with nuclear DNA contents in C. glacialis and P. elongatus; there was no correlation of lengths with nucleus number in P. acuspes. Development rate of late-stage C. glacialis was negatively related to nuclear DNA contents. The slight, but significant, differences among females within and among samples and treatments suggest that their DNA contents are both inherent and subject to slight environmental effects. Results are also consistent with earlier indications that body sizes and development rates of copepods, because of restricted variation in cell number, are partly under nucleotypic control.Key words: Copepoda, genome size, intraspecific variation, nucleotypic effects, body size, development rate. Article in Journal/Newspaper Calanus glacialis Copepods Canadian Science Publishing Genome 35 4 602 610 |
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Open Polar |
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Canadian Science Publishing |
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English |
description |
Feulgen staining revealed significant geographical differences in mean DNA contents of somatic nuclei of adult female Calanus glacialis and Pseudocalanus acuspes from the Canadian arctic and Nova Scotia; the latter exhibited seasonal differences near Halifax in 1987 but not 1989–1990. Female P. elongatus reared for 96 generations in the laboratory had significantly less DNA per nucleus than did first-generation females from the same North Sea wild stock. Nuclei of C. glacialis reared from juvenile stages (copepodid III) in four food–temperature treatments had significantly more DNA at high food and low temperature. There were also significant treatment effects in P. elongatus and P. acuspes reared from egg to adult. There were always significant differences in DNA contents among females within samples and treatments. Increased variance among nuclei within individual C. glacialis may have resulted from suboptimal laboratory conditions. Body lengths in rearing experiments were positively correlated with nuclear DNA contents in C. glacialis and P. elongatus; there was no correlation of lengths with nucleus number in P. acuspes. Development rate of late-stage C. glacialis was negatively related to nuclear DNA contents. The slight, but significant, differences among females within and among samples and treatments suggest that their DNA contents are both inherent and subject to slight environmental effects. Results are also consistent with earlier indications that body sizes and development rates of copepods, because of restricted variation in cell number, are partly under nucleotypic control.Key words: Copepoda, genome size, intraspecific variation, nucleotypic effects, body size, development rate. |
format |
Article in Journal/Newspaper |
author |
Escribano, Ruben McLaren, Ian A. Breteler, W. C. M. Klein |
spellingShingle |
Escribano, Ruben McLaren, Ian A. Breteler, W. C. M. Klein Innate and acquired variation of nuclear DNA contents of marine copepods |
author_facet |
Escribano, Ruben McLaren, Ian A. Breteler, W. C. M. Klein |
author_sort |
Escribano, Ruben |
title |
Innate and acquired variation of nuclear DNA contents of marine copepods |
title_short |
Innate and acquired variation of nuclear DNA contents of marine copepods |
title_full |
Innate and acquired variation of nuclear DNA contents of marine copepods |
title_fullStr |
Innate and acquired variation of nuclear DNA contents of marine copepods |
title_full_unstemmed |
Innate and acquired variation of nuclear DNA contents of marine copepods |
title_sort |
innate and acquired variation of nuclear dna contents of marine copepods |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/g92-090 http://www.nrcresearchpress.com/doi/pdf/10.1139/g92-090 |
genre |
Calanus glacialis Copepods |
genre_facet |
Calanus glacialis Copepods |
op_source |
Genome volume 35, issue 4, page 602-610 ISSN 0831-2796 1480-3321 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/g92-090 |
container_title |
Genome |
container_volume |
35 |
container_issue |
4 |
container_start_page |
602 |
op_container_end_page |
610 |
_version_ |
1810437886460297216 |