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Abstract Detail



Molecular Ecology and Evolution

Mandakova, Terezie [1], Lysak, Martin [1].

Tribal-specific reciprocal translocation in the tribe Cardamineae (Brassicaceae).

We used the Ancestral Crucifer Karyotype (ACK; n=8) consisting of eight ancestral chromosomes and 24 conserved genomic blocks as a basis for the reconstruction of karyotype evolution in eight x = 8 genera (Armoracia, Barbarea, Cardamine, Dentaria, Leavenworthia, Nasturtium, Rorippa and Sisymbrella) from the tribe Cardamineae (Brassicaceae). Comparative chromosome painting with Arabidopsis thaliana painting probes arranged according to the 24 ancestral genomic blocks revealed (i) hight level of chromosome collinearity between analyzed species and the ancestral n = 8 genome, and (ii) tribal-specific reciprocal translocation between chromosomes AK6 and AK8 shared by all the analyzed Cardamineae taxa. Two Cardamineae-specific translocation chromosomes AK6/8 and AK8/6 represent a rare taxon-specific genomic change which has occurred before the diversification of the Cardamineae. Interestingly, these results also suggest that the origin of twelve genera harboring almost 340 species has not been associated with major chromosome reshuffling and that the revealed reciprocal translocation can have a possible adaptive significance.


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1 - CEITEC, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic

Keywords:
Brassicaceae
Cardamine
karyotype evolution
chromosome rearrangements
Polyploidy
Phylogenetics.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PME001
Abstract ID:144
Candidate for Awards:None


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