The tool “Cytogenetics” offers the search for currently available data on genome size, chromosome number, and ploidal level. Currently, ca. 15% and 60% out of the 3660 species from the Brassicaceae are incorporated in BrassiBase for genome size and chromosome numbers, respectively. Taxonomic ranks from genera and species up to subspecies are searchable.
The phylogenetic backbone of tribal relationships which is used to display cytogenetic information is based on a comprehensive and up-to-date meta-phylogeny (Franzke et al. 2011).
The search field accepts scientific plant names, i. e. names of genera or Brassicaceae tribes.
- Arabideae — will find information about all member genera of tribe Arabideae.
- Arabis — will find information about the genus Arabis.
- Arabis alpina — will limit the search to the species Arabis alpina
After having typed 3 characters, you'll be provided with suggestions from the database.
Registered users can also use the advanced search to find data by combinations of values. Choose fields of interest and set criteria using dropdown menus. Fill in desired values (numbers or Y/N).
Genome size data and chromosome numbers are fundamental information to characterize genomes, which are very dynamic in plants in both size and structure. Genome sizes in the Brassicaceae family are small on average (1C = 0.51 pg), especially when compared to the largest up to now known genome of Paris japonica from the Melanthiaceae family (1C = 152.23 pg). Only certain Brassicaceae species from various tribes of Lineage III reach genome sizes up to 1C = 4.31 pg. Genome up- and downsizing has been shown to be rapid in the Brassicaceae family (Lysak et al., 2009), and the number of polyploids is with about 65% in congruence with the 50-70% portion of polyploids estimated for angiosperms (Wendel, 2000). Tetraploidy is most frequent within the Brassicaceae, and numerous genera are characterized by high-polyploidy (e.g., Draba). Taxa frequently occur both as diploid and polyploid cytotypes.
Genome sizes were obtained from literature; chromosome counts were assembled from Warwick et al. (2006), and additional counts were added from the literature (since 2006). Both datasets were extended by ongoing screening in Heidelberg. Ploidal levels were estimated based on literature and in collaboration with Martin Lysak (Brno). For all datasets, literature values were subjected to a critical quality check, and the newest taxonomic concept of Al-Shehbaz (2012) was applied.
- Al-Shehbaz IA. 2012. A generic and tribal synopsis of the Brassicaceae (Cruciferae). Taxon 61:931-954.
- Franzke A, Lysak MA, Al-Shehbaz IA, Koch MA, Mummenhoff K. 2011. Cabbage family affairs: the evolutionary history of Brassicaceae. Trends in Plant Sciences 16: 108-116
- Lysak MA, Koch MA, Leitch IJ, Beaulieau JM, Meister A. 2009. The dynamic ups and downs of genome size evolution in Brassicaceae. Mol. Biol. Evol. 26:85-98.
- Lysak MA, Koch MA. 2011. Phylogeny, Genome, and Karyotype Evolution of Crucifers (Brassicaceae). In: R. Schmidt; I. Bancraft (eds.) Genetics and Genomics of the Brassicaceae pp. 1-33. Springer New York, Dordrecht, Heidelberg, London
- Mandakova T, Joly S, Krzywinski M, Mummenhoff K, Lysak MA. 2010. Fast Diploidization in Close Mesopolyploid Relatives of Arabidopsis. The Plant Cell, 22:2277–2290
- Wendel JF. 2000. Genome evolution in polyploids. Plant Mol. Biol. 42:225-249.
- References cited in result table
Cytogenetic Data Plots
Standard phylogenetic diagram with genome sizes
Standard phylogenetic diagram with cytogenetic information
Average genome sizes within tribes