Figure 4.

Synteny around Loci Present in U. hordei and S. reilianum but Missing in U. maydis.

RNA silencing genes Dicer Uh-Dcl1 (UHOR_08937) (A), Argonaute Uh-Ago1 (UHOR_06256) (B), chromodomain gene Uh-Chp1 (UHOR_05116) (C), and a Cytosine 5-specific methyltransferase Uh-DNAme (UHOR_08509) (D) are depicted as dark arrows. Synteny is indicated by shaded bars with percentage of amino acid identity between the predicted flanking proteins. Note the four genes to the right of Uh-Chp1 (C), one of which (UHOR_15241) is related to two genes, UHO_0374 and UHO_0261, possibly coding a DNA polymerase III ε-subunit and previously found embedded in repeats in the U. hordei MAT-1 region (GenBank accession number AM118080; Bakkeren et al., 2006), and three genes (UHOR_17012, UHOR_17013, and UHOR_17014) that match many related genes in the genome and likely code for reverse transcriptase, gag-pol/copia-type proteins (pfam07727) usually indicative of a retrotransposon.