Mean expansion of the genetic map in RI strains. The average is approximately 3.7 for 100 independent RI lines. The x-axis can also be considered as the mean number of recombinations per 100 cM in different RI strains. This can be transformed into the total number of recombinations per strain by multiplying by the genetic length of the mouse genome in morgans (approximately 14 morgans; 2.25x = 31.5 recombinations/strain, 3x = 42 recombinations/strain, 4x = 56 recombinations/strain; and 6x = 84 recombinations/strain).
Williams et al. Genome Biology 2001 2:research0046.1-research0046.18 doi:10.1186/gb-2001-2-11-research0046