Phylogenomic profiles of whole-genome duplications in Poaceae and landscape of differential duplicate retention and losses among major Poaceae lineages

Taikui Zhang, Weichen Huang, Lin Zhang, Li De-Zhu, Ji Qi () and Hong Ma ()
Additional contact information
Taikui Zhang: University Park
Weichen Huang: University Park
Lin Zhang: Fudan University
Li De-Zhu: Chinese Academy of Sciences
Ji Qi: Fudan University
Hong Ma: University Park

Nature Communications, 2024, vol. 15, issue 1, 1-27

Abstract: Abstract Poaceae members shared a whole-genome duplication called rho. However, little is known about the evolutionary pattern of the rho-derived duplicates among Poaceae lineages and implications in adaptive evolution. Here we present phylogenomic/phylotranscriptomic analyses of 363 grasses covering all 12 subfamilies and report nine previously unknown whole-genome duplications. Furthermore, duplications from a single whole-genome duplication were mapped to multiple nodes on the species phylogeny; a whole-genome duplication was likely shared by woody bamboos with possible gene flow from herbaceous bamboos; and recent paralogues of a tetraploid Oryza are implicated in tolerance of seawater submergence. Moreover, rho duplicates showing differential retention among subfamilies include those with functions in environmental adaptations or morphogenesis, including ACOT for aquatic environments (Oryzoideae), CK2β for cold responses (Pooideae), SPIRAL1 for rapid cell elongation (Bambusoideae), and PAI1 for drought/cold responses (Panicoideae). This study presents a Poaceae whole-genome duplication profile with evidence for multiple evolutionary mechanisms that contribute to gene retention and losses.

Date: 2024
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DOI: 10.1038/s41467-024-47428-9

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