Fig. 2 Frequency distribution of water-use efficiency in the F₂ generation of L. esculentum x L. pennellii grown in a wet (A) and a dry (B) environment in 1995 and terminated early (C) and late (D) in 1996. Arrows indicate the mean water-use efficiency of L. esculentum, L. pennellii, and the F₁ generation. In the dry environment, the value for L. pennellii was outside the range of the x-axis at 1.15 g kg^-1

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