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Cited by 384

The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.

Mechanisms of chromosome number reduction in Arabidopsis thaliana and related Brassicaceae species

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Lysak, Martin A., Berr, Alexandre, Pecinka, Ales, Schmidt, Renate, McBreen, Kim, Schubert, Ingo·2006·Proceedings of the National Academy of Sciences

Abstract

Evolution of chromosome complements can be resolved by genome sequencing, comparative genetic mapping, and comparative chromosome painting. Previously, comparison of genetic maps and gene-based phylogenies suggested that the karyotypes of Arabidopsis thaliana(n= 5) and of related species with six or seven chromosome pairs were derived from an ancestral karyotype with eight chromosome pairs. To test this hypothesis, we applied multicolor chromosome painting using contiguous bacterial artificial chromosome pools of A. thaliana arranged according to the genetic maps of Arabidopsis lyrata and Capsella rubella(both n= 8) to A. thaliana,A. lyrata,Neslia paniculata,Turritis glabra, and Hornungia alpina. This approach allowed us to map the A. lyrata centromeres as a prerequisite to defining a putative ancestral karyotype (n= 8) and to elucidate the evolutionary mechanisms that shaped the karyotype of A. thaliana and its relatives. We conclude that chromosome “fusions” in A. thaliana resulted from (i) generation of acrocentric chromosomes by pericentric inversions, (ii) reciprocal translocation between two chromosomes (one or both acrocentric), and (iii) elimination of a minichromosome that arose in addition to the “fusion chromosome.” Comparative chromosome painting applied to N. paniculata(n= 7),T. glabra(n= 6), and H. alpina(n= 6), for which genetic maps are not available, revealed chromosomal colinearity between all species tested and allowed us to reconstruct the evolution of their chromosomes from a putative ancestral karyotype (n= 8). Although involving different ancestral chromosomes, chromosome number reduction followed similar routes as found within the genus Arabidopsis.

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Metadata

Authors
Lysak, M. A., Berr, A., Pecinka, A., Schmidt, R., McBreen, K., & Schubert, I.
Venue
Proceedings of the National Academy of Sciences
Published
2006-03-20
Volume
103
Issue
13
Pages
5224-5229
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2142900481
Cited by
384
References
31
FWCI
24.40
Type
journal article
Language
en
Open access
bronze

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