Syntenic dotplot of Brassica rapa versus itself. Syntenic dots colored by Ks values. Strong evidence of Brassica rapa's triploidy. Pink: Brassica rapa specific triploidy; Purple: most recent tetaploidy shared with Arabidopsis lineage; Blue: second most recent tetaploidy shared with Arabidopsis lineage. Result may be regenereated at http://genomevolution.org/r/ntv .