Table 2 Linear mixed models testing for diverging trait values in N=160 genotypes originating from four sites along a natural rainfall gradient (including control plots only), when grown under five water levels in the greenhouse. For site, posthoc results are provided to identify diverging sites (arid, semi-arid, Mediterranean, mesic-Mediterranean). Highlighted in bold are traits where trait divergence between sites followed a cline along the rainfall gradient. Note that residual df are Kenward-Roger approximated and can therefore differ among models; 13C isotopes were measured in only 56 genotypes.