Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina

Autores
Leofanti, Gabriela Agustina; Camadro, Elsa Lucila
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Bromus Section Ceratochloa includes temperate forage species. South American species form a morphologically very variable hexaploid complex (2n = 6x = 42), with a controversial taxonomic classification. Reproductive biology has been studied in several of them, but the number of analyzed plants has seldom been reported. Further investigations might clarify breeding relations and the adequacy of current classifications. Pollen viability and size, which can provide evidence of spontaneous hybridization, were studied in seven accessions (six plants/accession) classified as B. catharticus var. catharticus, var. elata, and var. rupestris; B. parodii; B. bonariensis; B. lithobius; and B. coloratus. Variability was detected among accessions for average pollen viability (54%–82%) and pollen size (15.8%– 26.2% n.). Meiotic analyses were performed in a sample of genotypes from five accessions with <70% pollen viability and/or variability in pollen size. Normal and abnormal meiocytes (11.9%–44.5%) were recorded at various meiotic stages in one randomly taken genotype from each sample. Since these cleistogamous species can produce chasmogamous flowers, the analyzed accessions, conserved as “species”, are apparently of hybrid origin. Segregation in hybrid populations could add to the confusion in taxonomy, affecting both conservation of genetic diversity and efficiency of parental selection in breeding.
Fil: Leofanti, Gabriela Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Fil: Camadro, Elsa Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Materia
FORAGE GRASSES
HYBRIDS
MEIOSIS
POLLEN SIZE
POLLEN VIABILITY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/91767
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from ArgentinaLeofanti, Gabriela AgustinaCamadro, Elsa LucilaFORAGE GRASSESHYBRIDSMEIOSISPOLLEN SIZEPOLLEN VIABILITYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Bromus Section Ceratochloa includes temperate forage species. South American species form a morphologically very variable hexaploid complex (2n = 6x = 42), with a controversial taxonomic classification. Reproductive biology has been studied in several of them, but the number of analyzed plants has seldom been reported. Further investigations might clarify breeding relations and the adequacy of current classifications. Pollen viability and size, which can provide evidence of spontaneous hybridization, were studied in seven accessions (six plants/accession) classified as B. catharticus var. catharticus, var. elata, and var. rupestris; B. parodii; B. bonariensis; B. lithobius; and B. coloratus. Variability was detected among accessions for average pollen viability (54%–82%) and pollen size (15.8%– 26.2% n.). Meiotic analyses were performed in a sample of genotypes from five accessions with <70% pollen viability and/or variability in pollen size. Normal and abnormal meiocytes (11.9%–44.5%) were recorded at various meiotic stages in one randomly taken genotype from each sample. Since these cleistogamous species can produce chasmogamous flowers, the analyzed accessions, conserved as “species”, are apparently of hybrid origin. Segregation in hybrid populations could add to the confusion in taxonomy, affecting both conservation of genetic diversity and efficiency of parental selection in breeding.Fil: Leofanti, Gabriela Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; ArgentinaFil: Camadro, Elsa Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; ArgentinaTubitak Scientific & Technical Research Council Turkey2016-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/91767Leofanti, Gabriela Agustina; Camadro, Elsa Lucila; Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina; Tubitak Scientific & Technical Research Council Turkey; Turkish Journal of Botany; 41; 2; 10-2016; 127-1331300-008X1303-6106CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://journals.tubitak.gov.tr/botany/abstract.htm?id=20246info:eu-repo/semantics/altIdentifier/doi/10.3906/bot-1607-46info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:58Zoai:ri.conicet.gov.ar:11336/91767instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:59.081CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
title Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
spellingShingle Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
Leofanti, Gabriela Agustina
FORAGE GRASSES
HYBRIDS
MEIOSIS
POLLEN SIZE
POLLEN VIABILITY
title_short Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
title_full Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
title_fullStr Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
title_full_unstemmed Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
title_sort Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina
dc.creator.none.fl_str_mv Leofanti, Gabriela Agustina
Camadro, Elsa Lucila
author Leofanti, Gabriela Agustina
author_facet Leofanti, Gabriela Agustina
Camadro, Elsa Lucila
author_role author
author2 Camadro, Elsa Lucila
author2_role author
dc.subject.none.fl_str_mv FORAGE GRASSES
HYBRIDS
MEIOSIS
POLLEN SIZE
POLLEN VIABILITY
topic FORAGE GRASSES
HYBRIDS
MEIOSIS
POLLEN SIZE
POLLEN VIABILITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Bromus Section Ceratochloa includes temperate forage species. South American species form a morphologically very variable hexaploid complex (2n = 6x = 42), with a controversial taxonomic classification. Reproductive biology has been studied in several of them, but the number of analyzed plants has seldom been reported. Further investigations might clarify breeding relations and the adequacy of current classifications. Pollen viability and size, which can provide evidence of spontaneous hybridization, were studied in seven accessions (six plants/accession) classified as B. catharticus var. catharticus, var. elata, and var. rupestris; B. parodii; B. bonariensis; B. lithobius; and B. coloratus. Variability was detected among accessions for average pollen viability (54%–82%) and pollen size (15.8%– 26.2% n.). Meiotic analyses were performed in a sample of genotypes from five accessions with <70% pollen viability and/or variability in pollen size. Normal and abnormal meiocytes (11.9%–44.5%) were recorded at various meiotic stages in one randomly taken genotype from each sample. Since these cleistogamous species can produce chasmogamous flowers, the analyzed accessions, conserved as “species”, are apparently of hybrid origin. Segregation in hybrid populations could add to the confusion in taxonomy, affecting both conservation of genetic diversity and efficiency of parental selection in breeding.
Fil: Leofanti, Gabriela Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Fil: Camadro, Elsa Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
description Bromus Section Ceratochloa includes temperate forage species. South American species form a morphologically very variable hexaploid complex (2n = 6x = 42), with a controversial taxonomic classification. Reproductive biology has been studied in several of them, but the number of analyzed plants has seldom been reported. Further investigations might clarify breeding relations and the adequacy of current classifications. Pollen viability and size, which can provide evidence of spontaneous hybridization, were studied in seven accessions (six plants/accession) classified as B. catharticus var. catharticus, var. elata, and var. rupestris; B. parodii; B. bonariensis; B. lithobius; and B. coloratus. Variability was detected among accessions for average pollen viability (54%–82%) and pollen size (15.8%– 26.2% n.). Meiotic analyses were performed in a sample of genotypes from five accessions with <70% pollen viability and/or variability in pollen size. Normal and abnormal meiocytes (11.9%–44.5%) were recorded at various meiotic stages in one randomly taken genotype from each sample. Since these cleistogamous species can produce chasmogamous flowers, the analyzed accessions, conserved as “species”, are apparently of hybrid origin. Segregation in hybrid populations could add to the confusion in taxonomy, affecting both conservation of genetic diversity and efficiency of parental selection in breeding.
publishDate 2016
dc.date.none.fl_str_mv 2016-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/91767
Leofanti, Gabriela Agustina; Camadro, Elsa Lucila; Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina; Tubitak Scientific & Technical Research Council Turkey; Turkish Journal of Botany; 41; 2; 10-2016; 127-133
1300-008X
1303-6106
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91767
identifier_str_mv Leofanti, Gabriela Agustina; Camadro, Elsa Lucila; Pollen viability and meiotic abnormalities in brome grasses (Bromus L., section Ceratochloa) from Argentina; Tubitak Scientific & Technical Research Council Turkey; Turkish Journal of Botany; 41; 2; 10-2016; 127-133
1300-008X
1303-6106
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://journals.tubitak.gov.tr/botany/abstract.htm?id=20246
info:eu-repo/semantics/altIdentifier/doi/10.3906/bot-1607-46
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Tubitak Scientific & Technical Research Council Turkey
publisher.none.fl_str_mv Tubitak Scientific & Technical Research Council Turkey
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269777793384448
score 13.13397

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