Table 7.

Effect of, and interaction between, year, production system (ORG vs. CON), and table grape type (black vs. red) on the content of individual anthocyanins in red and black grape samples from a UK supermarket survey (3-factor ANOVA, the values presented are means ± SE).

Factor	Concentrations of Individual Anthocyanins (mg FW kg−1)
	Delphindin 3-O-Glucoside	Cyanindin 3-O-Glucoside	Petunidin 3-O-Glucoside	Peonidin 3-O-Glucoside	Malvidin 3-O-Glucoside	Peonidin 3-O-p-Coumaroyl Glucoside	Malvidin 3-O-p-Coumaroyl Glucoside
Year (Yr)
2015 (n = 37)	29 ± 7	23 ± 5	51 ± 12	241 ± 39	567 ± 113	31 ± 6	264 ± 65
2016 (n = 15)	40 ± 22	24 ± 10	75 ± 37	273 ± 73	759 ± 321	37 ± 14	272 ± 126
Production system (PS)
ORG (n = 26)	37 ± 11	21 ± 6	65 ± 18	207 ± 36	673 ± 183	34 ± 8	270 ± 82
CON (n = 26)	28 ± 13	25 ± 7	52 ± 20	294 ± 59	572 ± 162	32 ± 9	262 ± 84
Grape type (GT)
black (n = 22)	67 ± 17	21 ± 8	128 ± 25	279 ± 64	1415 ± 181	67 ± 10	627 ± 93
red (n = 30)	7 ± 3	25 ± 5	7 ± 2	229 ± 39	41 ± 7	8 ± 2	2 ± 0.4
ANOVA p-values
Main effects
Yr	NS	NS	NS	NS	NS	NS	NS
PS	NS	NS	NS	NS	NS	NS	NS
GT	<0.0001	NS	<0.0001	NS	<0.0001	<0.0001	<0.0001
Interactions *
Yr:PS	0.0360	NS	0.0846	NS	NS	NS	NS
Yr:GT	0.0088	NS	0.0030	NS	0.0010	NS	NS
Yr:PS:GT	0.01101	NS	0.0238 1	0.0142 1	NS	NS	NS

p-values in italic are for trends (0.1 < p < 0.05); p-values in bold are significant (p < 0.05). * only interactions for which significant results were detected are shown; ¹ see Table 12 for interaction means ± SE.