Marker sequences from the Illumina GoldenGate assay (as presented in the S3 File) and from the previously developed transcriptome map [31 (link)] were aligned to the perennial ryegrass genome [25 (link)] using BLAT [38 (link)]. Only sequences that aligned to a single genomic location were retained. These were then used as markers to integrate the information from both genetic linkage maps for ordering scaffolds from the genome assembly. This was done using ALLMAPS [39 (link)] and equal weighting was applied to both maps. The chain file with the anchored scaffolds is presented in S4 File.
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