129467 20241125101124.0 doi 10.1093/molbev/msad259 sideral 135767 ART-2023-135767 eng Mu, Wenjie Subgenomic Stability of Progenitor Genomes During Repeated Allotetraploid Origins of the Same Grass Brachypodium hybridum 2023 Access copy available to the general public Unrestricted Both homeologous exchanges and homeologous expression bias are generally found in most allopolyploid species. Whether homeologous exchanges and homeologous expression bias differ between repeated allopolyploid speciation events from the same progenitor species remains unknown. Here, we detected a third independent and recent allotetraploid origin for the model grass Brachypodium hybridum. Our homeologous exchange with replacement analyses indicated the absence of significant homeologous exchanges in any of the three types of wild allotetraploids, supporting the integrity of their progenitor subgenomes and the immediate creation of the amphidiploids. Further homeologous expression bias tests did not uncover significant subgenomic dominance in different tissues and conditions of the allotetraploids. This suggests a balanced expression of homeologs under similar or dissimilar ecological conditions in their natural habitats. We observed that the density of transposons around genes was not associated with the initial establishment of subgenome dominance; rather, this feature is inherited from the progenitor genome. We found that drought response genes were highly induced in the two subgenomes, likely contributing to the local adaptation of this species to arid habitats in the third allotetraploid event. These findings provide evidence for the consistency of subgenomic stability of parental genomes across multiple allopolyploidization events that led to the same species at different periods. Our study emphasizes the importance of selecting closely related progenitor species genomes to accurately assess homeologous exchange with replacement in allopolyploids, thereby avoiding the detection of false homeologous exchanges when using less related progenitor species genomes. info:eu-repo/grantAgreement/ES/DGA-FSE/A01-23R info:eu-repo/grantAgreement/ES/DGA/LMP82-21 info:eu-repo/grantAgreement/ES/MICINN/PID2019-108195GB-I00 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 11.0 2023 BIOCHEMISTRY & MOLECULAR BIOLOGY 16 / 313 = 0.051 2023 Q1 T1 EVOLUTIONARY BIOLOGY 4 / 54 = 0.074 2023 Q1 T1 GENETICS & HEREDITY 8 / 191 = 0.042 2023 Q1 T1 4.061 2023 Ecology, Evolution, Behavior and Systematics 2023 Q1 Molecular Biology 2023 Q1 Genetics 2023 Q1 19.7 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Li, Kexin Yang, Yongzhi Breiman, Adina Yang, Jiao Wu, Ying Zhu, Mingjia Wang, Shuai Catalan, Pilar Universidad de Zaragoza (orcid)0000-0001-7793-5259 Nevo, Eviatar Liu, Jianquan 5011 063 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Botánica 40, 12 (2023), 1-20 Mol. biol. evol. Molecular biology and evolution 0737-4038 6046720 http://zaguan.unizar.es/record/129467/files/texto_completo.pdf Versión publicada 3308821 http://zaguan.unizar.es/record/129467/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:129467 articulos driver 2024-11-22-11:57:10 ARTICLE