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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 and Martin LYSÁK. Hybridization-facilitated genome merger and repeated chromosome fusion after 8 million years. \textit{Plant Journal}. Oxford: Blackwell Publishing Ltd, 2018, vol.~96, No~4, p.~748-760. ISSN~0960-7412. Available from: https://dx.doi.org/10.1111/tpj.14065.
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