Apomeiosis stability in weeping lovegrass: genetic control across time and environments

Autores
Quevedo, Martín Raúl; Selva, Juan Pablo; Echenique, Carmen Viviana; Zappacosta, Diego Carlos
Año de publicación
2025
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Weeping lovegrass (Eragrostis curvula) is a perennial grass that exhibits a specific form of embryo sac development known as Eragrostis-type, that is being used as a model species to investigate the genetic and epigenetic regulation of apomixis. Most apomictic plants are facultative, with sexuality typically strongly repressed or expressed at very low levels under normal conditions. Stressful situations can de-repress sexuality, increasing the occurrence of sexual processes in apomictic plants. In E. curvula, mapping studies have shown that apomeiosis is controlled by a single genomic region. However, the frequency of apomictic reproduction varies widely among hybrids(from 3% to 97%), suggesting that additional regulatory mechanisms may be involved. This study aimed to evaluate the stability of apomeiosis expression in sibling plants exhibiting differentfrequencies of apomeiosis, assessed across multiple years and contrasting environmental conditions. Plants from a mapping population derived from a cross between the tetraploid cultivars OTA-S and Don Walter were analyzed. Panicles were collected at the onset of anthesis for phenotypic analysis based on the identification of structures characteristic of either apomictic or sexual development. Samples from plants growing in the greenhouse and also under field conditions collected during spring flowering periods (November-December) for at least three years were evaluated. Eleven plants were selected to be evaluated based on their apomeiosisfrequency: low (≤ 30%), medium (30–70%), or high (≥ 70%). Results showed that all the evaluated plants maintained consistent levels of apomeiosis expression across the years. The same situation was observed between samples grown under greenhouse or field conditions. These findings suggest that, while environmental factors may influence the expression of the trait, genetic factors play a more dominant role in regulating apomeiosis in E. curvula.
Fil: Quevedo, Martín Raúl. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Selva, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Echenique, Carmen Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Zappacosta, Diego Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
V International APOMIXIS 2025 Conference
Montpellier
Francia
International Association of Sexual Plant Reproduction Research
Alpha Visa Congrès
Institut de Recherche pour le Développement
Materia
APOMIXIS
TRAIT
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:11336/281482
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/281482
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Apomeiosis stability in weeping lovegrass: genetic control across time and environmentsQuevedo, Martín RaúlSelva, Juan PabloEchenique, Carmen VivianaZappacosta, Diego CarlosAPOMIXISTRAIThttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Weeping lovegrass (Eragrostis curvula) is a perennial grass that exhibits a specific form of embryo sac development known as Eragrostis-type, that is being used as a model species to investigate the genetic and epigenetic regulation of apomixis. Most apomictic plants are facultative, with sexuality typically strongly repressed or expressed at very low levels under normal conditions. Stressful situations can de-repress sexuality, increasing the occurrence of sexual processes in apomictic plants. In E. curvula, mapping studies have shown that apomeiosis is controlled by a single genomic region. However, the frequency of apomictic reproduction varies widely among hybrids(from 3% to 97%), suggesting that additional regulatory mechanisms may be involved. This study aimed to evaluate the stability of apomeiosis expression in sibling plants exhibiting differentfrequencies of apomeiosis, assessed across multiple years and contrasting environmental conditions. Plants from a mapping population derived from a cross between the tetraploid cultivars OTA-S and Don Walter were analyzed. Panicles were collected at the onset of anthesis for phenotypic analysis based on the identification of structures characteristic of either apomictic or sexual development. Samples from plants growing in the greenhouse and also under field conditions collected during spring flowering periods (November-December) for at least three years were evaluated. Eleven plants were selected to be evaluated based on their apomeiosisfrequency: low (≤ 30%), medium (30–70%), or high (≥ 70%). Results showed that all the evaluated plants maintained consistent levels of apomeiosis expression across the years. The same situation was observed between samples grown under greenhouse or field conditions. These findings suggest that, while environmental factors may influence the expression of the trait, genetic factors play a more dominant role in regulating apomeiosis in E. curvula.Fil: Quevedo, Martín Raúl. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Selva, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Echenique, Carmen Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Zappacosta, Diego Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaV International APOMIXIS 2025 ConferenceMontpellierFranciaInternational Association of Sexual Plant Reproduction ResearchAlpha Visa CongrèsInstitut de Recherche pour le DéveloppementInternational Association of Sexual Plant Reproduction Research2025info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectConferenciaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/281482Apomeiosis stability in weeping lovegrass: genetic control across time and environments; V International APOMIXIS 2025 Conference; Montpellier; Francia; 2025; 83-83CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.alphavisa.com/apomixis/2025/Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:31:46Zoai:ri.conicet.gov.ar:11336/281482instacron: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:34982026-02-26 10:31:47.067CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Apomeiosis stability in weeping lovegrass: genetic control across time and environments
title Apomeiosis stability in weeping lovegrass: genetic control across time and environments
spellingShingle Apomeiosis stability in weeping lovegrass: genetic control across time and environments
Quevedo, Martín Raúl
APOMIXIS
TRAIT
title_short Apomeiosis stability in weeping lovegrass: genetic control across time and environments
title_full Apomeiosis stability in weeping lovegrass: genetic control across time and environments
title_fullStr Apomeiosis stability in weeping lovegrass: genetic control across time and environments
title_full_unstemmed Apomeiosis stability in weeping lovegrass: genetic control across time and environments
title_sort Apomeiosis stability in weeping lovegrass: genetic control across time and environments
dc.creator.none.fl_str_mv Quevedo, Martín Raúl
Selva, Juan Pablo
Echenique, Carmen Viviana
Zappacosta, Diego Carlos
author Quevedo, Martín Raúl
author_facet Quevedo, Martín Raúl
Selva, Juan Pablo
Echenique, Carmen Viviana
Zappacosta, Diego Carlos
author_role author
author2 Selva, Juan Pablo
Echenique, Carmen Viviana
Zappacosta, Diego Carlos
author2_role author
author
author
dc.subject.none.fl_str_mv APOMIXIS
TRAIT
topic APOMIXIS
TRAIT
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Weeping lovegrass (Eragrostis curvula) is a perennial grass that exhibits a specific form of embryo sac development known as Eragrostis-type, that is being used as a model species to investigate the genetic and epigenetic regulation of apomixis. Most apomictic plants are facultative, with sexuality typically strongly repressed or expressed at very low levels under normal conditions. Stressful situations can de-repress sexuality, increasing the occurrence of sexual processes in apomictic plants. In E. curvula, mapping studies have shown that apomeiosis is controlled by a single genomic region. However, the frequency of apomictic reproduction varies widely among hybrids(from 3% to 97%), suggesting that additional regulatory mechanisms may be involved. This study aimed to evaluate the stability of apomeiosis expression in sibling plants exhibiting differentfrequencies of apomeiosis, assessed across multiple years and contrasting environmental conditions. Plants from a mapping population derived from a cross between the tetraploid cultivars OTA-S and Don Walter were analyzed. Panicles were collected at the onset of anthesis for phenotypic analysis based on the identification of structures characteristic of either apomictic or sexual development. Samples from plants growing in the greenhouse and also under field conditions collected during spring flowering periods (November-December) for at least three years were evaluated. Eleven plants were selected to be evaluated based on their apomeiosisfrequency: low (≤ 30%), medium (30–70%), or high (≥ 70%). Results showed that all the evaluated plants maintained consistent levels of apomeiosis expression across the years. The same situation was observed between samples grown under greenhouse or field conditions. These findings suggest that, while environmental factors may influence the expression of the trait, genetic factors play a more dominant role in regulating apomeiosis in E. curvula.
Fil: Quevedo, Martín Raúl. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Selva, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Echenique, Carmen Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Zappacosta, Diego Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
V International APOMIXIS 2025 Conference
Montpellier
Francia
International Association of Sexual Plant Reproduction Research
Alpha Visa Congrès
Institut de Recherche pour le Développement
description Weeping lovegrass (Eragrostis curvula) is a perennial grass that exhibits a specific form of embryo sac development known as Eragrostis-type, that is being used as a model species to investigate the genetic and epigenetic regulation of apomixis. Most apomictic plants are facultative, with sexuality typically strongly repressed or expressed at very low levels under normal conditions. Stressful situations can de-repress sexuality, increasing the occurrence of sexual processes in apomictic plants. In E. curvula, mapping studies have shown that apomeiosis is controlled by a single genomic region. However, the frequency of apomictic reproduction varies widely among hybrids(from 3% to 97%), suggesting that additional regulatory mechanisms may be involved. This study aimed to evaluate the stability of apomeiosis expression in sibling plants exhibiting differentfrequencies of apomeiosis, assessed across multiple years and contrasting environmental conditions. Plants from a mapping population derived from a cross between the tetraploid cultivars OTA-S and Don Walter were analyzed. Panicles were collected at the onset of anthesis for phenotypic analysis based on the identification of structures characteristic of either apomictic or sexual development. Samples from plants growing in the greenhouse and also under field conditions collected during spring flowering periods (November-December) for at least three years were evaluated. Eleven plants were selected to be evaluated based on their apomeiosisfrequency: low (≤ 30%), medium (30–70%), or high (≥ 70%). Results showed that all the evaluated plants maintained consistent levels of apomeiosis expression across the years. The same situation was observed between samples grown under greenhouse or field conditions. These findings suggest that, while environmental factors may influence the expression of the trait, genetic factors play a more dominant role in regulating apomeiosis in E. curvula.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Conferencia
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/281482
Apomeiosis stability in weeping lovegrass: genetic control across time and environments; V International APOMIXIS 2025 Conference; Montpellier; Francia; 2025; 83-83
CONICET Digital
CONICET
url http://hdl.handle.net/11336/281482
identifier_str_mv Apomeiosis stability in weeping lovegrass: genetic control across time and environments; V International APOMIXIS 2025 Conference; Montpellier; Francia; 2025; 83-83
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.alphavisa.com/apomixis/2025/
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv International Association of Sexual Plant Reproduction Research
publisher.none.fl_str_mv International Association of Sexual Plant Reproduction Research
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
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