Table 2.

Trait correlations for northern (EUR, MEN, VAL) and southern (SLO, SBA, SAN) populations separated by water treatment from the year 1 multi-population survey. High water treatment correlations are shaded in grey and low water treatments correlations are unshaded. Statistically significant correlations (P < 0.05) are in bold type

		High water
	Northern populations	Nitrogen(%)	LMA(g m−2)	Root:shoot ratio	Growth rate (cm d−1)	Days to flowering	Amass(nmol CO2 g−1 s−1)	WUE(CO2 mm−1 H2O)
Low water	Nitrogen		−0.63	−0.44	−0.15	0.64	0.39	−0.05
	LMA	−0.61		0.26	0.01	−0.24	−0.70	0.12
	Root:shoot ratio	0.01	−0.22		−0.08	−0.39	0.19	0.07
	Growth rate	−0.23	0.15	−0.28		−0.25	0.17	−0.04
	Days to flowering	0.27	0.12	−0.48	−0.11		0.05	−0.18
	Amass	0.23	−0.55	0.25	−0.48	−0.12		−0.12
	WUE	0.07	−0.20	0.24	−0.29	−0.23	0.63
	Southern populations	High water
		Nitrogen	LMA	Root:shoot ratio	Growth rate	Days to flowering	Amass	WUE
Low Water	Nitrogen		−0.31	−0.19	−0.03	0.22	0.32	−0.16
	LMA	−0.36		−0.03	−0.01	0.42	−0.58	0.45
	Root:shoot ratio	−0.11	−0.26		0.42	−0.61	−0.18	0.03
	Growth rate	−0.13	−0.01	0.23		−0.33	−0.23	0.10
	Days to flowering	0.16	0.42	−0.65	−0.17		−0.20	0.11
	Amass	−0.63	0.36	−0.51	−0.13	0.16		−0.24
	WUE	−0.62	0.21	−0.11	−0.28	−0.22	0.48