CA/TA and TG/TA ratios at <i>NWD</i> loci.

NWD loci were sliced as the three functional domain encoding sequences, and successive 750bp regions upstream and downstream of the genes were analysed. Significantly lower values at a 99% confidence interval are bold. As a control, CA/TA and TG/TA ratios for 20 different randomly selected 750bp regions of P. anserina genome were 2.244+/− 0.854 and 2.225+/− 0.992 respectively. Low ratios downstream of HNWD1 appear to result from RIP of a repeated sequence related to a Tad3-2 LINE element and sequences upstream of HNWD3 match P. anserina centromeric DNA.