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Genome constitution and evolution of Elymus atratus (Poaceae: Triticeae) inferred from cytogenetic and phylogenetic analysis.
- Source :
- Genes & Genomics; May2024, Vol. 46 Issue 5, p589-599, 11p
- Publication Year :
- 2024
-
Abstract
- Background: Elymus atratus (Nevski) Hand.-Mazz. is perennial hexaploid wheatgrass. It was assigned to the genus Elymus L. sensu stricto based on morphological characters. Its genome constitution has not been disentangled yet. Objective: To identify the genome constitution and origin of E. atratus. Methods: In this study, genomic in situ hybridization and fluorescence in situ hybridization, and phylogenetic analysis based on the Acc1, DMC1 and matK sequences were performed. Results: Genomic in situ hybridization and fluorescence in situ hybridization results reveal that E. atratus 2n = 6x = 42 is composed of 14 St genome chromosomes, 14 H genome chromosomes, and 14 Y genome chromosomes including two H-Y type translocation chromosomes, suggesting that the genome formula of E. atratus is StStYYHH. The phylogenetic analysis based on Acc1 and DMC1 sequences not only shows that the Y genome originated in a separate diploid, but also suggests that Pseudoroegneria (St), Hordeum (H), and a diploid species with Y genome were the potential donors of E. atratus. Data from chloroplast DNA showed that the maternal donor of E. atratus contains the St genome. Conclusion: Elymus atratus is an allohexaploid species with StYH genome, which may have originated through the hybridization between an allotetraploid Roegneria (StY) species as the maternal donor and a diploid Hordeum (H) species as the paternal donor. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19769571
- Volume :
- 46
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Genes & Genomics
- Publication Type :
- Academic Journal
- Accession number :
- 176689543
- Full Text :
- https://doi.org/10.1007/s13258-024-01496-9