Unraveling the mesopolyploid history of Australian crucifers (Brassicaceae)

Warning

This publication doesn't include Faculty of Sports Studies. It includes Faculty of Science. Official publication website can be found on muni.cz.
Authors

MANDÁKOVÁ Terezie LYSÁK Martin

Year of publication 2009
Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description The lowest chromosome numbers known in Brassicaceae (n=4-6) can be found in endemic Australian cruciferous species closely related to the model species Arabidopsis thaliana. We aimed to reconstruct the modes of chromosome number reduction in the Australian taxa from a tentative Ancestral Crucifer Karyotype (ACK, n=8) by comparative chromosome painting (CCP). In three Australian cruciferous species, Stenopetalum nutans (2n=8), Arabidella eremigena (2n=10) and Ballantinia antipoda (2n=12), all 24 genomic blocks of the ACK were unexpectedly found in duplicates. These data suggest that all three species experienced a relatively recent whole-genome duplication followed by massive karyotype reshuffling and chromosome fusions. The unique associations of ancestral genomic blocks shared by the ACK and the Australian crucifers suggest that the reduced crucifer karyotypes (n=4-6) descended from the ACK (n=8) via a polyploid ancestor with yet unknown chromosome number.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info