Values and contribution of 19 bioclimatic variables to present distributions of maize landraces and teosintes.

For each variable, averages across 10 replicates based on occurrence data included in the training set are reported. Significance of the contribution of bioclimatic variables to the present distributions was assessed using three measures: the percent contribution of variables, the permutation importance, and the individual variable contribution (see Materials and Methods). In bold are the variables for which all three measures were ranked among the top-five values and, in italics, variables for which two of three values were in the top-five.

: Bioclimatic variables defined as: BIO1 = Annual Mean Temperature (°C*10), BIO2 = Mean Diurnal Range (Mean of Monthly Maximum Temperature - Minimum Temperature;°C*10), BIO3 = Isothermality (BIO2/BIO7) (*100), BIO4 = Temperature Seasonality (standard deviation *100), BIO5 = Maximum Temperature of Warmest Month (°C*10), BIO6 = Minimum Temperature of Coldest Month (°C*10), BIO7 = Temperature Annual Range (BIO5–BIO6; °C*10), BIO8 = Mean Temperature of Wettest Quarter (°C*10), BIO9 = Mean Temperature of Driest Quarter (°C*10), BIO10 = Mean Temperature of Warmest Quarter (°C*10), BIO11 = Mean Temperature of Coldest Quarter (°C*10), BIO12 = Annual Precipitation (mm), BIO13 = Precipitation of Wettest Month (mm), BIO14 = Precipitation of Driest Month (mm), BIO15 = Precipitation Seasonality (Coefficient of Variation), BIO16 = Precipitation of Wettest Quarter (mm), BIO17 = Precipitation of Driest Quarter (mm), BIO18 = Precipitation of Warmest Quarter (mm), BIO19 = Precipitation of Coldest Quarter (mm).