Table 1.

Multiple linear regression equations of two tree peony cultivars, “High Noon” and “Roufurong”

Cultivars	Equations
“High Noon”	L* = 66.173 + 6.214 THC (R2 = 0.867, P < 0.05)
	C* = 41.198 + 11.574 Ch (R2 = 0.960, P < 0.01)
	h = 114.597 − 3.215 THC (R2 = 0.979, P < 0.01)
	a* = −30.806 + 26.860 Lu − 4.801 Ch (R2 = 0.993, P < 0.05)
	b* = 38.558 + 5.095 THC (R2 = 0.980, P < 0.01)
“Roufurong”	L* = 74.970 − 5.889 Pg3G (R2 = 0.908, P < 0.05)
	C* = 214.880 − 335.919 Lu (R2 = 0.827, P < 0.05)
	h = −164.139 + 122.546 Pg3G + 22840.617 Ch (R2 = 0.999, P < 0.01)
	a* = 7.308 + 9.695 Pn3G − 2261.699 Ch (R2 = 0.997, P < 0.05)
	b* = 38.353 − 5.126 Pn3G − 7.639 Ap (R2 = 0.999, P < 0.01)

a* redness, Ap apigenin, b* yellowness, C* chroma, Ch chrysoeriol, Cy3G cyanidin 3-O-glucoside, h hue angle, Is isorhamnetin, Km kaempferol, L* brightness, Lu luteolin, Pg3G pelargonidin 3-O-glucoside, Pn3G peonidin 3-O-glucoside, Qu quercetin, THC tetrahydroxychalcone