Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum

Climate change is increasing the frequency and severity of drought worldwide, threatening the environmental resilience of cultivated grasses. However, the genetic diversity in many wild grasses could contribute to the development of climate-adapted varieties. Here, we elucidated the impact of polypl...

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Autores: Wang, Yuanyuan, Chen, Guang, Zeng, Fanrong, Deng, Fenglin, Yang, Zujun, Han, Zhigang, Xu, Shengchun, Nevo, Eviatar, Catalán, Pilar, Chen, Zhong-Hua
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:161048
Acceso en línea:http://zaguan.unizar.es/record/161048
Access Level:acceso abierto
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spelling Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridumWang, YuanyuanChen, GuangZeng, FanrongDeng, FenglinYang, ZujunHan, ZhigangXu, ShengchunNevo, EviatarCatalán, PilarChen, Zhong-HuaClimate change is increasing the frequency and severity of drought worldwide, threatening the environmental resilience of cultivated grasses. However, the genetic diversity in many wild grasses could contribute to the development of climate-adapted varieties. Here, we elucidated the impact of polyploidy on drought responses using allotetraploid Brachypodium hybridum (B. hybridum) and its progenitor diploid species Brachypodium stacei (B. stacei). Our findings suggest that progenitor species’ genomic legacies resulting from hybridization and whole-genome duplications conferred greater ecological adaptive advantages to B. hybridum compared with B. stacei. Genes related to stomatal regulation and the immune response from S-subgenomes were under positive selection during speciation, underscoring their evolutionary importance in adapting to environmental stresses. Biased expression in polyploid subgenomes (B. stacei-type and B. distachyon-type) significantly influenced differential gene expression, with the dominant subgenome exhibiting more differential expression. B. hybridum adapted a drought escape strategy characterized by higher photosynthetic capacity and lower intrinsic water-use efficiency than B. stacei, driven by a highly correlated coexpression network involving genes in the circadian rhythm pathway. In summary, our study shows the influence of polyploidy on ecological and environmental adaptation and resilience in model Brachypodium grasses. These insights hold promise for informing the breeding of climate-resilient cereal crops and pasture grasses.2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/161048reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MICINN/PID2022-140074NB-I00info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131073B-I00info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1610482026-05-29T13:59:51Z
dc.title.none.fl_str_mv Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
title Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
spellingShingle Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
Wang, Yuanyuan
title_short Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
title_full Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
title_fullStr Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
title_full_unstemmed Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
title_sort Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum
dc.creator.none.fl_str_mv Wang, Yuanyuan
Chen, Guang
Zeng, Fanrong
Deng, Fenglin
Yang, Zujun
Han, Zhigang
Xu, Shengchun
Nevo, Eviatar
Catalán, Pilar
Chen, Zhong-Hua
author Wang, Yuanyuan
author_facet Wang, Yuanyuan
Chen, Guang
Zeng, Fanrong
Deng, Fenglin
Yang, Zujun
Han, Zhigang
Xu, Shengchun
Nevo, Eviatar
Catalán, Pilar
Chen, Zhong-Hua
author_role author
author2 Chen, Guang
Zeng, Fanrong
Deng, Fenglin
Yang, Zujun
Han, Zhigang
Xu, Shengchun
Nevo, Eviatar
Catalán, Pilar
Chen, Zhong-Hua
author2_role author
author
author
author
author
author
author
author
author
description Climate change is increasing the frequency and severity of drought worldwide, threatening the environmental resilience of cultivated grasses. However, the genetic diversity in many wild grasses could contribute to the development of climate-adapted varieties. Here, we elucidated the impact of polyploidy on drought responses using allotetraploid Brachypodium hybridum (B. hybridum) and its progenitor diploid species Brachypodium stacei (B. stacei). Our findings suggest that progenitor species’ genomic legacies resulting from hybridization and whole-genome duplications conferred greater ecological adaptive advantages to B. hybridum compared with B. stacei. Genes related to stomatal regulation and the immune response from S-subgenomes were under positive selection during speciation, underscoring their evolutionary importance in adapting to environmental stresses. Biased expression in polyploid subgenomes (B. stacei-type and B. distachyon-type) significantly influenced differential gene expression, with the dominant subgenome exhibiting more differential expression. B. hybridum adapted a drought escape strategy characterized by higher photosynthetic capacity and lower intrinsic water-use efficiency than B. stacei, driven by a highly correlated coexpression network involving genes in the circadian rhythm pathway. In summary, our study shows the influence of polyploidy on ecological and environmental adaptation and resilience in model Brachypodium grasses. These insights hold promise for informing the breeding of climate-resilient cereal crops and pasture grasses.
publishDate 2025
dc.date.none.fl_str_mv 2025
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 http://zaguan.unizar.es/record/161048
url http://zaguan.unizar.es/record/161048
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MICINN/PID2022-140074NB-I00
info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131073B-I00
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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