Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes

Two dominant, closely linked and complementary genes, Btr1 and Btr2, control rachis brittleness in barley. Recessive mutations in any of these genes turn the fragile rachis (brittle) into a tough rachis phenotype (non‐brittle). The cross of parents with alternative mutations in the btr genes leads t...

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Detalles Bibliográficos
Autores: Fernández Calleja, Miriam, Casas Cendoya, Ana Maria, Pérez Torres, Antonio, Gracia Gimeno, Ma. Pilar, Igartua Arregui, Ernesto
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/83146
Acceso en línea:https://doi.org/10.1111/pbr.12776
http://hdl.handle.net/10459.1/83146
Access Level:acceso abierto
Palabra clave:Brittle rachis
Shattering
Domestication
Hybrid breeding
Dominance
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spelling Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genesFernández Calleja, MiriamCasas Cendoya, Ana MariaPérez Torres, AntonioGracia Gimeno, Ma. PilarIgartua Arregui, ErnestoBrittle rachisShatteringDomesticationHybrid breedingDominanceTwo dominant, closely linked and complementary genes, Btr1 and Btr2, control rachis brittleness in barley. Recessive mutations in any of these genes turn the fragile rachis (brittle) into a tough rachis phenotype (non‐brittle). The cross of parents with alternative mutations in the btr genes leads to a brittle F1 hybrid that presents grain retention problems. We evaluated rachis fragility through a mechanical test and under natural conditions, in F1 crosses with different compositions at the btr genes. Brittleness was significantly higher in Btr1btr1Btr2btr2 crosses compared to hybrids and inbred parents carrying one of the mutations (btr1btr1Btr2Btr2/Btr1Btr1btr2btr2). This fact could jeopardize the efficient harvest of hybrids bearing alternative mutations, reducing the choice of possible crosses for hybrid barley breeding and hindering the exploitation of potential heterotic patterns. Furthermore, non‐brittle hybrids showed higher brittleness than inbreds, suggesting the presence of other dominant factors affecting the trait. In conclusion, this work encourages a deeper study of the genetic control of the rachis brittleness trait and urges the consideration of rachis tenacity as a target for hybrid barley breeding.This work was supported by the Spanish Ministry of Economy, Industry and Competitiveness grants RFP2015 00006‐00‐00, and RTA2012‐00033‐C03‐02, and by the contract “Iberia region hybrid barley variety development and understanding effects of adaptation genes in hybrids,” between CSIC and Syngenta Crop Protection AG, which included funding for MFC PhD scholarship.John Wiley & Sons202220222020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttps://doi.org/10.1111/pbr.12776http://hdl.handle.net/10459.1/83146http://hdl.handle.net/10459.1/83146reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/MINECO//RTA2012‐00033‐C03‐02Versió postprint del document publicat a https://doi.org/10.1111/pbr.12776Plant Breeding, 2020, vol. 139, núm. 2, p. 317-327(c) John Wiley & Sons, 2020info:eu-repo/semantics/openAccessoai:recercat.cat:10459.1/831462026-05-29T05:05:01Z
dc.title.none.fl_str_mv Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
title Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
spellingShingle Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
Fernández Calleja, Miriam
Brittle rachis
Shattering
Domestication
Hybrid breeding
Dominance
title_short Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
title_full Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
title_fullStr Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
title_full_unstemmed Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
title_sort Rachis brittleness in a hybrid–parent barley (Hordeum vulgare) breeding germplasm with different combinations at the non‐brittle rachis genes
dc.creator.none.fl_str_mv Fernández Calleja, Miriam
Casas Cendoya, Ana Maria
Pérez Torres, Antonio
Gracia Gimeno, Ma. Pilar
Igartua Arregui, Ernesto
author Fernández Calleja, Miriam
author_facet Fernández Calleja, Miriam
Casas Cendoya, Ana Maria
Pérez Torres, Antonio
Gracia Gimeno, Ma. Pilar
Igartua Arregui, Ernesto
author_role author
author2 Casas Cendoya, Ana Maria
Pérez Torres, Antonio
Gracia Gimeno, Ma. Pilar
Igartua Arregui, Ernesto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Brittle rachis
Shattering
Domestication
Hybrid breeding
Dominance
topic Brittle rachis
Shattering
Domestication
Hybrid breeding
Dominance
description Two dominant, closely linked and complementary genes, Btr1 and Btr2, control rachis brittleness in barley. Recessive mutations in any of these genes turn the fragile rachis (brittle) into a tough rachis phenotype (non‐brittle). The cross of parents with alternative mutations in the btr genes leads to a brittle F1 hybrid that presents grain retention problems. We evaluated rachis fragility through a mechanical test and under natural conditions, in F1 crosses with different compositions at the btr genes. Brittleness was significantly higher in Btr1btr1Btr2btr2 crosses compared to hybrids and inbred parents carrying one of the mutations (btr1btr1Btr2Btr2/Btr1Btr1btr2btr2). This fact could jeopardize the efficient harvest of hybrids bearing alternative mutations, reducing the choice of possible crosses for hybrid barley breeding and hindering the exploitation of potential heterotic patterns. Furthermore, non‐brittle hybrids showed higher brittleness than inbreds, suggesting the presence of other dominant factors affecting the trait. In conclusion, this work encourages a deeper study of the genetic control of the rachis brittleness trait and urges the consideration of rachis tenacity as a target for hybrid barley breeding.
publishDate 2020
dc.date.none.fl_str_mv 2020
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1111/pbr.12776
http://hdl.handle.net/10459.1/83146
http://hdl.handle.net/10459.1/83146
url https://doi.org/10.1111/pbr.12776
http://hdl.handle.net/10459.1/83146
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//RTA2012‐00033‐C03‐02
Versió postprint del document publicat a https://doi.org/10.1111/pbr.12776
Plant Breeding, 2020, vol. 139, núm. 2, p. 317-327
dc.rights.none.fl_str_mv (c) John Wiley & Sons, 2020
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) John Wiley & Sons, 2020
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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