Skip to main content
. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Behav Genet. 2013 Aug 4;43(5):10.1007/s10519-013-9605-y. doi: 10.1007/s10519-013-9605-y

Fig. 1.

Fig. 1

High, medium, and low nicotine-consuming groups in F0 generation. Rats had free access to nicotine in water or plain water provided in two bottles for 6 weeks starting at 12 weeks of age. Each point shows the average weekly nicotine consumption of individual animals in the three groups over the last 3 weeks of exposure. Only rats with the highest and lowest nicotine consumption from the high and low groups were used for breeding of high and low nicotine-preferring lines in the F1 generation