TABLE 3

Least-squares mean absolute difference (centimorgans) and percentage of QTL position estimates at or flanking the QTL obtained from the IBD method using different haplotype sizes with 1-cM marker spacing in a two-breed cross followed by random mating

Generations of random matingNo. of markers used in IBD method
124610
1002.53a2.17b2.02c1.99c2.28b
36.7%40.9%41.3%36.2%
202.30a2.09b1.96c1.91c2.01b,c
38.2%43.4%44.6%42.8%
102.35a2.16b2.04b2.10b2.08b
35.8%38.3%38.9%39.2%
52.43a2.25b2.07c2.07c2.22b
31.8%36.7%38.3%36.7%
12.52a2.30b,c2.21c2.18c2.40b
31.8%34.9%34.8%31.1%
  • The mean absolute difference of the QTL position estimate from its true position for the IBD mapping method used in populations created under the crossbred scenario is shown. The position of the QTL is the center of the 10-marker haplotype, and the effective population size is 100. The percentage of position estimates at or flanking the true QTL position is given for each haplotype size except for 1 marker. For a given number of generations, least-squares means with different superscripts (a, b, c) are significantly different (P < 0.05).