Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis

Roots are essential for drought adaptation because of their involvement in water and nutrient uptake. As the study of the root system architecture (RSA) is costly and time-consuming, it is not generally considered in breeding programs. Thus, the identification of molecular markers linked to RSA trai...

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Autores: Rufo, Rubén, Salvi, Silvio, Royo i Calpe, Conxita, Soriano Soriano, José Miguel
Tipo de recurso: artículo
Estado:Versión publicada
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:10459.1/467767
Acceso en línea:https://doi.org/10.3390/agronomy10050613
https://hdl.handle.net/10459.1/467767
Access Level:acceso abierto
Palabra clave:Drought stress
Association mapping
Root system architecture
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spelling Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysisRufo, RubénSalvi, SilvioRoyo i Calpe, ConxitaSoriano Soriano, José MiguelDrought stressAssociation mappingRoot system architectureRoots are essential for drought adaptation because of their involvement in water and nutrient uptake. As the study of the root system architecture (RSA) is costly and time-consuming, it is not generally considered in breeding programs. Thus, the identification of molecular markers linked to RSA traits is of special interest to the breeding community. The reported correlation between the RSA of seedlings and adult plants simplifies its assessment. Methods: In this study, a panel of 170 bread wheat landraces from 24 Mediterranean countries was used to identify molecular markers associated with the seminal RSA and related traits: seminal root angle, total root number, root dry weight, seed weight and shoot length, and grain yield (GY). Results: A genome-wide association study identified 135 marker-trait associations explaining 6% to 15% of the phenotypic variances for root related traits and 112 for GY. Fifteen QTL hotspots were identified as the most important for controlling root trait variation and were shown to include 31 candidate genes related to RSA traits, seed size, root development, and abiotic stress tolerance (mainly drought). Co-location for root related traits and GY was found in 17 genome regions. In addition, only four out of the fifteen QTL hotspots were reported previously. Conclusions: The variability found in the Mediterranean wheat landraces is a valuable source of root traits to introgress into adapted phenotypes through marker-assisted breeding. The study reveals new loci affecting root development in wheat.This study was funded by projects AGL2015-65351-R and RTA2015-00072-C03-01 of the Spanish Ministry of Economy and Competitiveness. R.R. is a recipient of a PhD grant from the Spanish Ministry of Economy and Competitiveness.MDPI2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.3390/agronomy10050613https://hdl.handle.net/10459.1/467767reponame: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/AGL2015-65351-R/ESReproducció del document publicat a https://doi.org/10.3390/agronomy10050613Agronomy, 2020, vol. 10, núm. 613cc-by (c) Rufo et al., 2020Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:recercat.cat:10459.1/4677672026-05-29T05:05:01Z
dc.title.none.fl_str_mv Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
title Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
spellingShingle Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
Rufo, Rubén
Drought stress
Association mapping
Root system architecture
title_short Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
title_full Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
title_fullStr Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
title_full_unstemmed Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
title_sort Exploring the genetic architecture of root-related traits in Mediterranean bread wheat landraces by genome-wide association analysis
dc.creator.none.fl_str_mv Rufo, Rubén
Salvi, Silvio
Royo i Calpe, Conxita
Soriano Soriano, José Miguel
author Rufo, Rubén
author_facet Rufo, Rubén
Salvi, Silvio
Royo i Calpe, Conxita
Soriano Soriano, José Miguel
author_role author
author2 Salvi, Silvio
Royo i Calpe, Conxita
Soriano Soriano, José Miguel
author2_role author
author
author
dc.subject.none.fl_str_mv Drought stress
Association mapping
Root system architecture
topic Drought stress
Association mapping
Root system architecture
description Roots are essential for drought adaptation because of their involvement in water and nutrient uptake. As the study of the root system architecture (RSA) is costly and time-consuming, it is not generally considered in breeding programs. Thus, the identification of molecular markers linked to RSA traits is of special interest to the breeding community. The reported correlation between the RSA of seedlings and adult plants simplifies its assessment. Methods: In this study, a panel of 170 bread wheat landraces from 24 Mediterranean countries was used to identify molecular markers associated with the seminal RSA and related traits: seminal root angle, total root number, root dry weight, seed weight and shoot length, and grain yield (GY). Results: A genome-wide association study identified 135 marker-trait associations explaining 6% to 15% of the phenotypic variances for root related traits and 112 for GY. Fifteen QTL hotspots were identified as the most important for controlling root trait variation and were shown to include 31 candidate genes related to RSA traits, seed size, root development, and abiotic stress tolerance (mainly drought). Co-location for root related traits and GY was found in 17 genome regions. In addition, only four out of the fifteen QTL hotspots were reported previously. Conclusions: The variability found in the Mediterranean wheat landraces is a valuable source of root traits to introgress into adapted phenotypes through marker-assisted breeding. The study reveals new loci affecting root development in wheat.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3390/agronomy10050613
https://hdl.handle.net/10459.1/467767
url https://doi.org/10.3390/agronomy10050613
https://hdl.handle.net/10459.1/467767
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/AGL2015-65351-R/ES
Reproducció del document publicat a https://doi.org/10.3390/agronomy10050613
Agronomy, 2020, vol. 10, núm. 613
dc.rights.none.fl_str_mv cc-by (c) Rufo et al., 2020
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Rufo et al., 2020
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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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