Table 4.

Permutation Tests of Significance of the Contribution to a Multitrait LOD Score of Individual Measures

Chr 1Chr 3Chr 5Chr 6
Shuttle box     Avoidances0.6620.8880.0210.0000.561
Fear conditioning  Cue0.8000.7310.1210.0000.732
Context0.6820.6610.2280.0020.790
Elevated plus maze  Pct open arm time0.5520.5510.2030.0000.832
  Closed arm entries0.2020.9810.7110.411
Open field   Activity in periphery0.8420.2220.0000.1290.0000.953
   Activity in center0.7320.7180.8410.289
Acoustic startle response0.4780.7320.8790.154
Spontaneous activity0.0170.0300.8630.8610.0140.000
Grooming0.4270.2320.0930.0000.143
Rearing0.0000.0000.9200.6780.920
Defecation0.1180.0000.0000.4560.0000.000
Chr 10Chr 15Chr 19Chr X
Shuttle box     Avoidances0.0000.0000.7470.7650.621
Fear conditioning  Cue0.4710.5620.8810.881
Context0.5550.0000.4440.8310.923
Elevated plus maze  Pct open arm time0.6470.4470.5180.921
  Closed arm entries0.5220.1610.7590.929
Open field   Activity in periphery0.0590.6450.8000.0380.000
   Activity in center0.1330.0600.0210.5610.677
Acoustic startle response0.0270.0000.4120.0110.6270.621
Spontaneous activity0.2370.7610.9290.5100.019
Grooming0.5210.0000.0000.0330.0001.000
Rearing0.2420.0120.1450.6660.321
Defecation0.0270.0000.4320.4790.0000.000

[i] Two columns are shown for each quantitative trait loci. In the first, the probabilities of the contribution when all measures are included in the analysis are shown. The second displays the probabilities after all nonsignificant contributors have been excluded in stepwise fashion, as explained in the text. The results are based on 10,000 permutations.