The distribution of <i>Mu</i> insertion sites in the maize genome. LiuSanzhen YehCheng-Ting JiTieming YingKai WuHaiyan Man TangHo FuYan NettletonDan S. SchnablePatrick 2009 <p>(A) Each horizontal line on chromosomes represents a 1-Mb window. Lines are intensity- and color-coded to indicate the number of <i>Mu</i> insertions per Mb. Grey vertical lines represent the approximate positions of centromeres <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1000733#pgen.1000733-Wolfgruber1" target="_blank">[67]</a>. (B) The locally-weighted polynomial regression (<i>LOWESS</i>) curve with smooth span (f) equaling to 0.4 of the number of <i>Mu</i> insertions per 1-Mb window (y-axis) was plotted versus the corresponding window's coordinates (Mb, x-axis). The vertical paired grey lines represent approximate centromere positions <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1000733#pgen.1000733-Wolfgruber1" target="_blank">[67]</a>. Those patterns we observed are unlikely to be artifacts of the removal of repetitive MFS, because only a small proportion of all MFSs (1.4%) were removed based on their ability to map to multiple positions in the genome.</p>