Fig. 3
From: Pattern of genotype by environment interaction for radiata pine in southern Australia
PCA ordination based on climate variables and grouping of 20 trial site locations as NPI regions: Western Australia (WA), Green Triangle (GT), Murray Valley (MV), Central Victoria (CV), Otways (OTW), Central Gippsland (GL), and Tasmania (TAS). Axes represent of most distinguishing climate variables: annual precipitation (AP), precipitation growing season (PGS), relative humidity at highest temperature (RHHT), relative humidity low temperature (RHLT), mean solar radiation (MTGS), and aridity index (AIX) (i.e. ratio of evaporation to precipitation)