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• W3029730486 abstract "In various eukaryotes, supernumerary B chromosomes (Bs) are an optional genomic component that affect their integrity and functioning. In the present study, the impact of Bs on the current changes in the genome of goatgrass, Aegilops speltoides, was addressed. Individual plants from contrasting populations with and without Bs were explored using fluorescence in situ hybridization. In parallel, abundances of the Ty1-copia, Ty3-gypsy, and LINE retrotransposons (TEs), and the species-specific Spelt1 tandem repeat (TR) in vegetative and generative spike tissues were estimated by real-time quantitative PCR. The results revealed: (i) ectopic associations between Bs and the regular A chromosomes, and (ii) cell-specific rearrangements of Bs in both mitosis and microgametogenesis. Further, the copy numbers of TEs and TR varied significantly between (iii) genotypes and (iv) different spike tissues in the same plant(s). Finally, (v) in plants with and without Bs from different populations, genomic abundances and/or copy number dynamics of TEs and TR were similar. These findings indicate that fluctuations in TE and TR copy numbers are associated with DNA damage and repair processes during cell proliferation and differentiation, and ectopic recombination is one of the mechanisms by which Bs play a role in genome changes." @default.
• W3029730486 created "2020-06-05" @default.
• W3029730486 creator A5005195565 @default.
• W3029730486 creator A5041416660 @default.
• W3029730486 date "2020-05-26" @default.
• W3029730486 modified "2023-09-26" @default.
• W3029730486 title "Supernumerary B Chromosomes and Plant Genome Changes: A Snapshot of Wild Populations of Aegilops speltoides Tausch (Poaceae, Triticeae)" @default.
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• W3029730486 doi "https://doi.org/10.3390/ijms21113768" @default.
• W3029730486 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7312783" @default.
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