CA/TA and TG/TA ratios at NWD 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.