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Fig. 2. Histograms of TKD for the newly established LN, CN and
HN lines in generations 1 (top) and 12 (bottom). At generation 12, the flies
had undergone 9 generations of knockdown selection. The error bars show s.e.m.
values for groups of flies fractionated at 0.5°C intervals. Each LN, CN
and HN group comprises four replicate populations. During knockdown,
1000
flies from each line are assayed for TKD; thus, each graph
represents TKD frequency distribution for
4000 flies.
The fitted line on each graph shows the maximum likelihood fit for a bimodal
distribution. The fitted parameters for the distributions are listed in
Table 1.