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Fig. 4. Histograms of nearest neighbor distances calculated between neuron response
patterns observed in reference (first) vs comparison (second)
populations for (A) parent vs parent, (B) parent vs
F1 hybrid, and (C) F1 hybrid vs parent
analyses. Also given are mean nearest neighbor distances for each comparison
(mean NND), and the probability level (P value) for the mean NND as
determined by Monte Carlo parametric bootstrapping. For the parent vs
F1 hybrid and F1 hybrid vs parent analyses
(B,C), P values indicate the proportions of randomly drawn parent and
F1 hybrid data sets sampled with replacement from a combined neuron
response sampling pool that had mean NND as great or greater than the observed
value in 10 000 trials. For the parent to parent analysis, the P
value represents the proportion of randomly drawn data sets of 77 neurons
sampled with replacement from the F1 hybrid population that had a
mean NND to the actual parent population the same or less than the observed
parent to parent value in 10 000 trials.