Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)

Clonal strains of the dinoflagellate Gymnodinium nolleri Ellegaard and Moestrup were intercrossed to determine if cyst-related traits are genetically regulated and to clarify unknown aspects in the sexuality of this species. The objectives were to determine whether the parental identity influenced t...

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Detalles Bibliográficos
Autores: Figueroa, Rosa Isabel, Rengefors, Karin, Bravo, Isabel
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/323296
Acceso en línea:http://hdl.handle.net/10261/323296
Access Level:acceso abierto
Palabra clave:Medio Marino
Centro Oceanográfico de Vigo
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spelling Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)Figueroa, Rosa IsabelRengefors, KarinBravo, IsabelMedio MarinoCentro Oceanográfico de VigoClonal strains of the dinoflagellate Gymnodinium nolleri Ellegaard and Moestrup were intercrossed to determine if cyst-related traits are genetically regulated and to clarify unknown aspects in the sexuality of this species. The objectives were to determine whether the parental identity influenced the physiological and morphological aspects of the cyst offspring, and to describe and compare nuclear development and cell division of encysting and non-encysting zygotes. Variables characteristic of each parental cross (difference in growth rates among parents, cyst production (CP), and genetic distance (GD) among parents assessed via an amplified fragment length analysis analysis) were studied to seek for possible relationships of the parental crosses with some characteristics of the cyst offspring (cyst size, length of dormancy period, germination success, and germling viability (V)). A principal component analysis using these variables showed three main results: (1) the dormancy period of cysts responded to a simple pattern of inheritance, (2) the larger the GD between parents, the smaller the CP, and progeny V, and (3) the size of cysts was influenced by both CP and the parental strain identity. A stable inheritance of the short dormancy period (14.6±5.5 days), dominant over medium (31.0±8.5 days) and long periods (52.7±9.2 days), was confirmed through two subsequent generations of cysts. The regulation of the sexual processes by a multiple loci system is discussed based on the pattern of inheritance of the dormancy period and the number of sexual recombination events recorded within cultures with self-CP capability. Fusion of the gamete nuclei happened 0–48 h after the total cytoplasmic fusion. The nucleus of the zygote was bilobed and had thick and distinct chromosomes. Similar processes of nuclear and cell division occurred in the non-encysting or encysting planozygote, and were characterized by the loss of the chromosomal structure, an apparent increase of the DNA content, and the formation of thinner chromosomes.Sí202320232006info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/323296reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3232962026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
title Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
spellingShingle Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
Figueroa, Rosa Isabel
Medio Marino
Centro Oceanográfico de Vigo
title_short Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
title_full Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
title_fullStr Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
title_full_unstemmed Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
title_sort Effects of parental factors and meiosis on sexual offspring of Gymnodinium nolleri (Dinophyceae)
dc.creator.none.fl_str_mv Figueroa, Rosa Isabel
Rengefors, Karin
Bravo, Isabel
author Figueroa, Rosa Isabel
author_facet Figueroa, Rosa Isabel
Rengefors, Karin
Bravo, Isabel
author_role author
author2 Rengefors, Karin
Bravo, Isabel
author2_role author
author
dc.subject.none.fl_str_mv Medio Marino
Centro Oceanográfico de Vigo
topic Medio Marino
Centro Oceanográfico de Vigo
description Clonal strains of the dinoflagellate Gymnodinium nolleri Ellegaard and Moestrup were intercrossed to determine if cyst-related traits are genetically regulated and to clarify unknown aspects in the sexuality of this species. The objectives were to determine whether the parental identity influenced the physiological and morphological aspects of the cyst offspring, and to describe and compare nuclear development and cell division of encysting and non-encysting zygotes. Variables characteristic of each parental cross (difference in growth rates among parents, cyst production (CP), and genetic distance (GD) among parents assessed via an amplified fragment length analysis analysis) were studied to seek for possible relationships of the parental crosses with some characteristics of the cyst offspring (cyst size, length of dormancy period, germination success, and germling viability (V)). A principal component analysis using these variables showed three main results: (1) the dormancy period of cysts responded to a simple pattern of inheritance, (2) the larger the GD between parents, the smaller the CP, and progeny V, and (3) the size of cysts was influenced by both CP and the parental strain identity. A stable inheritance of the short dormancy period (14.6±5.5 days), dominant over medium (31.0±8.5 days) and long periods (52.7±9.2 days), was confirmed through two subsequent generations of cysts. The regulation of the sexual processes by a multiple loci system is discussed based on the pattern of inheritance of the dormancy period and the number of sexual recombination events recorded within cultures with self-CP capability. Fusion of the gamete nuclei happened 0–48 h after the total cytoplasmic fusion. The nucleus of the zygote was bilobed and had thick and distinct chromosomes. Similar processes of nuclear and cell division occurred in the non-encysting or encysting planozygote, and were characterized by the loss of the chromosomal structure, an apparent increase of the DNA content, and the formation of thinner chromosomes.
publishDate 2006
dc.date.none.fl_str_mv 2006
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/323296
url http://hdl.handle.net/10261/323296
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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