Figure 6.

Precipitation and chromosome inversion. A: Inverse correlation between 2La inversion frequency and average annual precipitation. Average annual precipitation was calculated as for the data represented in Figure 5. ○ = average annual precipitation for each site. Details of precipitation data are provided in Additional file 1. The solid line is a linear model (y~ax+b) of data with coefficients of a = -0.0434 ± 0.00395 (P = 1.65 × 10^-6) and b = 120 ± 5.85 (P = 7.39 × 10^-9). B: Inverse correlation between 2Rb inversion frequency and annual precipitation. For a linear model, a= -0.0385 ± 0.00491 (P = 2.60 × 10^-5) and b = 101 ± 7.25 (P = 2.16 × 10^-7).