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@article{1477222, author = {Mandáková, Terezie and Guo, Xinyi and Ozudogru, B. and Mummenhoff, K. and Lysák, Martin}, article_location = {Oxford}, article_number = {4}, doi = {http://dx.doi.org/10.1111/tpj.14065}, keywords = {karyotype evolution; hybridization; ancient polyploidy; diploidization; chromosomal rearrangements; dysploidy; Ricotia}, language = {eng}, issn = {0960-7412}, journal = {Plant Journal}, title = {Hybridization-facilitated genome merger and repeated chromosome fusion after 8 million years}, url = {https://onlinelibrary.wiley.com/doi/epdf/10.1111/tpj.14065}, volume = {96}, year = {2018} }
TY - JOUR ID - 1477222 AU - Mandáková, Terezie - Guo, Xinyi - Ozudogru, B. - Mummenhoff, K. - Lysák, Martin PY - 2018 TI - Hybridization-facilitated genome merger and repeated chromosome fusion after 8 million years JF - Plant Journal VL - 96 IS - 4 SP - 748-760 EP - 748-760 PB - Blackwell Publishing Ltd SN - 09607412 KW - karyotype evolution KW - hybridization KW - ancient polyploidy KW - diploidization KW - chromosomal rearrangements KW - dysploidy KW - Ricotia UR - https://onlinelibrary.wiley.com/doi/epdf/10.1111/tpj.14065 N2 - The small genus Ricotia (nine species, Brassicaceae) is confined to the eastern Mediterranean. By comparative chromosome painting and a dated multi-gene chloroplast phylogeny, we reconstructed the origin and subsequent evolution of Ricotia. The ancestral Ricotia genome originated through hybridization between two older genomes with n = 7 and n = 8 chromosomes, respectively, on the Turkish mainland during the Early Miocene (c. 17.8 million years ago, Ma). Since then, the allotetraploid (n = 15) genome has been altered by two independent descending dysploidies (DD) to n = 14 in Ricotia aucheri and the Tenuifolia clade (2 spp.). By the Late Miocene (c. 10 Ma), the latter clade started to evolve in the most diverse Ricotia core clade (6 spp.), the process preceded by a DD event to n = 13. It is noteworthy that this dysploidy was mediated by a unique chromosomal rearrangement, merging together the same two chromosomes as were merged during the origin of a fusion chromosome within the paternal n = 7 genome c. 20 Ma. This shows that within a time period of c. 8 Myr genome evolution can repeat itself and that structurally very similar chromosomes may originate repeatedly from the same ancestral chromosomes by different pathways (end-to-end translocation versus nested chromosome insertion). ER -
MANDÁKOVÁ, Terezie, Xinyi GUO, B. OZUDOGRU, K. MUMMENHOFF a Martin LYSÁK. Hybridization-facilitated genome merger and repeated chromosome fusion after 8 million years. \textit{Plant Journal}. Oxford: Blackwell Publishing Ltd, 2018, roč.~96, č.~4, s.~748-760. ISSN~0960-7412. Dostupné z: https://dx.doi.org/10.1111/tpj.14065.
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