Alignment of contig 500 to the genome sequences. A. The contig is mapped to four regions in Arabidopsis, which are paralogs produced by the α and β duplications after the cotton-Arabidopsis divergence. The contigs are only anchored to a single Vitis chromosomal location. B. dot plot generated by MCscan on Plant Genome Duplication Database, showing conserved syntenic blocks between Vitis chr.8 and Arabidopsis chromosomes. The region corresponding to GR ctg 500 is marked by red circles.