ArticleCommunications biology2023
A genome assembly for Orinus kokonorica provides insights into the origin, adaptive evolution and further diversification of two closely related grass genera.
Article in Communications biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 5 citations in OpenAlex.
- Genomic Insights Into Species Divergence and Adaptive Evolution in the Grass GenusEcology and evolution · 2026Article
- Structural variation drives rhizome innovation and adaptive divergence in sister Medicago species.Journal of integrative plant biology · 2026Article
- Evolutionary Patterns Under Climatic Influences on the Distribution of thePlants (Basel, Switzerland) · 2026Article
- Deciphering the role of receptor-like kinases in the adaptation ofFrontiers in plant science · 2026Article
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- Transcription factors in Orinus: novel insights into transcription regulation for speciation adaptation on the Qinghai-Xizang (Tibet) Plateau.BMC plant biology · 2025Article
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10 authors at 3 institutions in 1 country.
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Abstract
Ancient whole-genome duplication (WGD) or polyploidization is prevalent in plants and has played a crucial role in plant adaptation. However, the underlying genomic basis of ecological adaptation and subsequent diversification after WGD are still poorly understood in most plants. Here, we report a chromosome-scale genome assembly for the genus Orinus (Orinus kokonorica as representative) and preform comparative genomics with its closely related genus Cleistogenes (Cleistogenes songorica as representative), both belonging to a newly named subtribe Orininae of the grass subfamily Chloridoideae. The two genera may share one paleo-allotetraploidy event before 10 million years ago, and the two subgenomes of O. kokonorica display neither fractionation bias nor global homoeolog expression dominance. We find substantial genome rearrangements and extensive structural variations (SVs) between the two species. With comparative transcriptomics, we demonstrate that functional innovations of orthologous genes may have played an important role in promoting adaptive evolution and diversification of the two genera after polyploidization. In addition, copy number variations and extensive SVs between orthologs of flower and rhizome related genes may contribute to the morphological differences between the two genera. Our results provide new insights into the adaptive evolution and subsequent diversification of the two genera after polyploidization.
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