Tracking the ancestry of known and ‘ghost’ homeologous subgenomes in model grass Brachypodium polyploids
Resumen: Unraveling the evolution of plant polyploids is a challenge when their diploid progenitor species are extinctor unknown or when genome sequences of known progenitors are unavailable. Existing subgenome identi-fication methods cannot adequately infer the homeologous genomes that are present in the allopolyploidsif they do not take into account the potential existence of unknown progenitors. We addressed this chal-lenge in the widely distributed dysploid grass genusBrachypodium, which is a model genus for temperatecereals and biofuel grasses. We used a transcriptome-based phylogeny and newly designed subgenomedetection algorithms coupled with a comparative chromosome barcoding analysis. Our phylogenomic sub-genome detection pipeline was validated inTriticumallopolyploids, which have known progenitor geno-mes, and then used to infer the identities of three subgenomes derived from extant diploid species and foursubgenomes derived from unknown diploid progenitors (ghost subgenomes) in sixBrachypodiumpolyplo-ids (B. mexicanum, B. boissieri, B. retusum, B. phoenicoides, B. rupestreandB. hybridum), of which fivecontain undescribed homeologous subgenomes. The existence of the sevenBrachypodiumprogenitor geno-mes in the polyploids was confirmed by their karyotypic barcode profiles. Comparative phylogenomics ofnuclear versus plastid trees allowed us to formulate hypothetical homoploid hybridizations and allo- andautopolyploidization scenarios that could have generated the sixBrachypodiumpolyploids.
Idioma: Inglés
DOI: 10.1111/tpj.15650
Año: 2022
Publicado en: PLANT JOURNAL 109, 6 (2022), 1535-1558
ISSN: 0960-7412

Factor impacto JCR: 7.2 (2022)
Categ. JCR: PLANT SCIENCES rank: 17 / 239 = 0.071 (2022) - Q1 - T1
Factor impacto CITESCORE: 11.6 - Biochemistry, Genetics and Molecular Biology (Q1) - Agricultural and Biological Sciences (Q1)

Factor impacto SCIMAGO: 2.118 - Cell Biology (Q1) - Plant Science (Q1) - Genetics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/A01-17
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/A01-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CGL2016-79790-P
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-108195GB-I00
Financiación: info:eu-repo/grantAgreement/ES/UZ/UZ2016-TEC-02
Tipo y forma: Article (Published version)
Área (Departamento): Área Botánica (Dpto. CC.Agrar.y Medio Natural)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.


Exportado de SIDERAL (2024-03-18-15:28:58)


Visitas y descargas

Este artículo se encuentra en las siguientes colecciones:
Articles



 Record created 2023-01-11, last modified 2024-03-19


Versión publicada:
 PDF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)