LOD plots from a genome wide QTL scan for prolificacy in a set of maize-teosinte BC₂S₃ RILs.

<p>Densely spaced black hash marks along the bottom axis represent genetic markers, curves represent logarithm of odds (LOD) scores for QTL at each genomic position. LOD curves for distinct QTLs on a single chromosome are plotted with different colors. The dotted horizontal line at LOD 4.44 represents the threshold for significance as determined by 10,000 permutations of the data. The <i>x</i>-axis shows the genetic position along the chromosomes in cM.