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@article{1645437,
author = {Mandáková, Terezie and Hloušková, Petra and Koch, M.A. and Lysák, Martin},
article_number = {3},
doi = {http://dx.doi.org/10.1105/tpc.19.00557},
keywords = {acrocentric chromosom; Arabis; chromosomal localization},
language = {eng},
issn = {1040-4651},
journal = {The Plant Cell},
title = {Genome Evolution in Arabideae Was Marked by Frequent Centromere Repositioning},
url = {http://www.plantcell.org/content/plantcell/32/3/650.full.pdf},
volume = {32},
year = {2020}
}
TY - JOUR
ID - 1645437
AU - Mandáková, Terezie - Hloušková, Petra - Koch, M.A. - Lysák, Martin
PY - 2020
TI - Genome Evolution in Arabideae Was Marked by Frequent Centromere Repositioning
JF - The Plant Cell
VL - 32
IS - 3
SP - 650-665
EP - 650-665
PB - American Society of Plant Physiologists
SN - 10404651
KW - acrocentric chromosom
KW - Arabis
KW - chromosomal localization
UR - http://www.plantcell.org/content/plantcell/32/3/650.full.pdf
L2 - http://www.plantcell.org/content/plantcell/32/3/650.full.pdf
N2 - Centromere position may change despite conserved chromosomal collinearity. Centromere repositioning and evolutionary new centromeres (ENCs) were frequently encountered during vertebrate genome evolution but only rarely observed in plants. The largest crucifer tribe, Arabideae (550 species; Brassicaceae, the mustard family), diversified into several well-defined subclades in the virtual absence of chromosome number variation. Bacterial artificial chromosome–based comparative chromosome painting uncovered a constancy of genome structures among 10 analyzed genomes representing seven Arabideae subclades classified as four genera: Arabis, Aubrieta, Draba, and Pseudoturritis. Interestingly, the intra-tribal diversification was marked by a high frequency of ENCs on five of the eight homoeologous chromosomes in the crown-group genera, but not in the most ancestral Pseudoturritis genome. From the 32 documented ENCs, at least 26 originated independently, including 4 ENCs recurrently formed at the same position in not closely related species. While chromosomal localization of ENCs does not reflect the phylogenetic position of the Arabideae subclades, centromere seeding was usually confined to long chromosome arms, transforming acrocentric chromosomes to (sub)metacentric chromosomes. Centromere repositioning is proposed as the key mechanism differentiating overall conserved homoeologous chromosomes across the crown-group Arabideae subclades. The evolutionary significance of centromere repositioning is discussed in the context of possible adaptive effects on recombination and epigenetic regulation of gene expression.
ER -
MANDÁKOVÁ, Terezie, Petra HLOUŠKOVÁ, M.A. KOCH and Martin LYSÁK. Genome Evolution in Arabideae Was Marked by Frequent Centromere Repositioning. \textit{The Plant Cell}. American Society of Plant Physiologists, 2020, vol.~32, No~3, p.~650-665. ISSN~1040-4651. Available from: https://dx.doi.org/10.1105/tpc.19.00557.
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