Table II.

Phenotypic correlations among N- and sugar-related traits in the Bay-0 × Shahdara RIL progeny (Pearson correlation coefficients)

N-related trait (total N content [NP], free amino acid concentration [AA], or nitrate concentration [NO]), flowering time under long days (LD), and DM values were obtained in previous studies (Loudet et al., 2002, 2003a). Sugar-related trait (starch [ST], Glu [GL], Fru [FR], or Suc [SU]) values were obtained in this study. Values in bold correspond to N− environment correlations; values in italic correspond to N+ environment correlations; and values in normal type correspond to correlations across N environments (N+/N−). ns, Correlation not significant at P < 0.01; ***, **, and *, correlation significant at P < 0.001, P < 0.01, and P < 0.05; NA, not available. N+/N−, Plants grown on 10 mm/3 mm nitrate.

N−/N+	DM	NP	AA	NO	LD	ST	GL	FR	SU
DM	+0.53***	−0.34***	ns	0.23***	0.21***	0.47***	0.17***	ns	ns
NP	−0.27***	+0.12***	+0.10*	0.73***	−0.21***	−0.65***	−0.31***	−0.14**	−0.27***
AA	−0.33***	0.84***	+0.22***	ns	0.16**	ns	ns	ns	0.16***
NO	NA	NA	NA	NA	ns	−0.47***	−0.22***	ns	−0.20***
LD	NA	NA	NA	NA	NA	0.18***	ns	ns	ns
ST	0.39***	−0.73***	−0.75***	−0.48***	NA	0.20***	0.38***	0.15**	0.33***
GL	0.22***	−0.10**	ns	ns	NA	ns	0.36***	0.71***	0.86***
FR	ns	ns	0.17***	ns	NA	ns	0.46***	0.56***	0.69***
SU	0.21***	−0.18***	ns	−0.16***	NA	0.15*	0.92***	0.49***	0.24***