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@article{1836937,
author = {Guo, Xinyi and Malík Mandáková, Terezie and Trachtová, Karolína and Ozudogru, B. and Liu, J.Q. and Lysák, Martin},
article_location = {OXFORD},
article_number = {5},
doi = {http://dx.doi.org/10.1093/molbev/msaa327},
keywords = {hybridization; polyploidy; whole-genome duplication; reticulate evolution; diploidization; dysploidy; chromosome rearrangements; phylogenetics},
language = {eng},
issn = {0737-4038},
journal = {Molecular Biology and Evolution},
title = {Linked by Ancestral Bonds: Multiple Whole-Genome Duplications and Reticulate Evolution in a Brassicaceae Tribe},
url = {https://academic.oup.com/mbe/article/38/5/1695/6040742},
volume = {38},
year = {2021}
}
TY - JOUR
ID - 1836937
AU - Guo, Xinyi - Malík Mandáková, Terezie - Trachtová, Karolína - Ozudogru, B. - Liu, J.Q. - Lysák, Martin
PY - 2021
TI - Linked by Ancestral Bonds: Multiple Whole-Genome Duplications and Reticulate Evolution in a Brassicaceae Tribe
JF - Molecular Biology and Evolution
VL - 38
IS - 5
SP - 1695-1714
EP - 1695-1714
PB - OXFORD UNIV PRESS
SN - 07374038
KW - hybridization
KW - polyploidy
KW - whole-genome duplication
KW - reticulate evolution
KW - diploidization
KW - dysploidy
KW - chromosome rearrangements
KW - phylogenetics
UR - https://academic.oup.com/mbe/article/38/5/1695/6040742
N2 - Pervasive hybridization and whole-genome duplications (WGDs) influenced genome evolution in several eukaryotic lineages. Although frequent and recurrent hybridizations may result in reticulate phylogenies, the evolutionary events underlying these reticulations, including detailed structure of the ancestral diploid and polyploid genomes, were only rarely reconstructed. Here, we elucidate the complex genomic history of a monophyletic clade from the mustard family (Brassicaceae), showing contentious relationships to the early-diverging clades of this model plant family. Genome evolution in the crucifer tribe Biscutelleae (similar to 60 species, 5 genera) was dominated by pervasive hybridizations and subsequent genome duplications. Diversification of an ancestral diploid genome into several divergent but crossable genomes was followed by hybridizations between these genomes. Whereas a single genus (Megadenia) remained diploid, the four remaining genera originated by allopolyploidy (Biscutella, Lunaria, Ricotia) or autopolyploidy (Heldreichia). The contentious relationships among the Biscutelleae genera, and between the tribe and other early diverged crucifer lineages, are best explained by close genomic relatedness among the recurrently hybridizing ancestral genomes. By using complementary cytogenomics and phylogenomics approaches, we demonstrate that the origin of a monophyletic plant clade can be more complex than a parsimonious assumption of a single WGD spurring postpolyploid cladogenesis. Instead, recurrent hybridization among the same and/or closely related parental genomes may phylogenetically interlink diploid and polyploid genomes despite the incidence of multiple independent WGDs. Our results provide new insights into evolution of early-diverging Brassicaceae lineages and elucidate challenges in resolving the contentious relationships within and between land plant lineages with pervasive hybridization and WGDs.
ER -
GUO, Xinyi, Terezie MALÍK MANDÁKOVÁ, Karolína TRACHTOVÁ, B. OZUDOGRU, J.Q. LIU and Martin LYSÁK. Linked by Ancestral Bonds: Multiple Whole-Genome Duplications and Reticulate Evolution in a Brassicaceae Tribe. \textit{Molecular Biology and Evolution}. OXFORD: OXFORD UNIV PRESS, 2021, vol.~38, No~5, p.~1695-1714. ISSN~0737-4038. Available from: https://dx.doi.org/10.1093/molbev/msaa327.
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