Table VII. The set of variables selected by multiple regression analysis to explain the 100% variance in grain yield under each growth condition in 2010.

Multiregression analysis showed the set of both agronomical parameters and metabolite levels, only metabolite levels, and metabolite levels under the WW condition explaining the 100% variance in grain yield. The results of the same analysis for 2011 are shown in Supplemental Table S8. Agronomic traits are shown in boldface. SEE, se of the estimate.

Treatment	All Parameters	Only Metabolites	Metabolites in the WW Condition
WW	Galactinol, Pro, octadecanoate, raffinose, xylitol, Thr, succinate, Phe, myoinositol, erythritol, glycerol, anthesis silking interval, itaconate, urea, silking date	Galactinol, Pro, octadecanoate, raffinose, xylitol, Thr, succinate, Phe, myoinositol, erythritol, glycerol, itaconate, glycerate, trehalose, Asp	Galactinol, Pro, octadecanoate, raffinose, xylitol, Thr, succinate, Phe, myoinositol, erythritol, glycerol, itaconate, glycerate, trehalose, Asp
SEE	0.84	0.84	0.84
DS	Galactinol, urea, octadecanoate, maltitol, glycerol-3-P, benzoate, putrescine	Galactinol, urea, octadecanoate, maltitol, glycerol-3-P, benzoate, putrescine	Galactinol, Pro, octadecanoate, raffinose, xylitol, Thr, succinate, Phe, myoinositol, erythritol, glycerol, itaconate, glycerate, trehalose, Asp
SEE	0.59	0.59	0.65
HS	Galactinol, xylitol, itaconate, Ala, anthesis date, Ser, urea, GABA, Tyr, Ile	Galactinol, xylitol, itaconate, Ala, raffinose, Ser, urea, GABA, Trp, Ile	Galactinol, glycerate, phosphate, Pro, erythritol, nicotinate, itaconate, glycerol, trehalose, Trp, succinate, xylitol, octadecanoate
SEE	0.83	0.83	1.45
DS+HS	Galactinol, trehalose, threonate, maltitol, glycerate, plant height, Fru, malate, Trp, β-Ala, urea	Galactinol, trehalose, threonate, maltitol, glycerate, nicotinate, Fru, malate, benzoate, phosphate, urea	Galactinol, Ala, raffinose, octadecanoate, succinate, myoinositol, Phe, Pro, xylitol, pyro-Glu, phosphate, urea
SEE	0.37	0.37	0.40