Table 2.

Free asparagine, total free amino acids and relative amount of free asparagine (mmol/kg dry weight) in 20 varieties of potatoes grown in the UK (mean ± standard deviation, n = 3).

variety	2-Months storage			6-Months storage			pa
	Free asparagine	Total free amino acidsb	Asparagine/total (%)	Free asparagine	Total free amino acids	Asparagine/total (%)
Hermes	33.1 ± 5.21	113 ± 8.17	29.4	22.8 ± 12.1	88.3 ± 23.8	25.8	NS
Lady Claire	12.4 ± 2.77	76.1 ± 10.1	16.2	8.0 ± 2.25	60.0 ± 5.85	13.4	NS
Lady Rosetta	15.5 ± 2.51	87.1 ± 10.4	17.8	10.5 ± 2.34	63.9 ± 6.53	16.5	NS
Saturna	16.1 ± 5.02	73.5 ± 5.99	21.9	13.6 ± 8.65	59.5 ± 19.5	22.9	NS
Verdi	11.6 ± 1.20	66.4 ± 11.4	17.6	4.8 ± 0.04	38.7 ± 1.35	12.5	∗∗∗
Challenger	18.3 ± 5.56	88.2 ± 14.6	20.8	8.8 ± 1.85	62.1 ± 6.83	14.1	∗
Daisy	14.1 ± 1.22	98.7 ± 11.3	14.3	11.6 ± 1.94	81.8 ± 8.07	14.1	NS
Desiree	30.5 ± 9.14	132 ± 20.0	23.2	26.4 ± 8.36	105 ± 26.3	25.1	NS
Fontane	10.4 ± 0.76	72.6 ± 14.5	14.3	10.4 ± 1.68	70.5 ± 3.77	14.7	NS
Innovator	18.7 ± 3.18	89.1 ± 3.74	21.0	17.8 ± 5.69	89.7 ± 10.1	19.8	NS
King Edward	16.4 ± 3.22	118 ± 21.3	13.9	13.7 ± 6.20	103 ± 25.1	13.3	NS
Lady Blanca	37.5 ± 7.65	131 ± 23.1	28.6	35.6 ± 4.18	116 ± 7.76	30.8	NS
Lady Olympia	22.3 ± 3.37	99.4 ± 14.2	22.5	18.7 ± 5.62	94.3 ± 3.99	19.9	NS
Maris Piper	22.6 ± 5.43	113 ± 19.6	19.9	17.2 ± 2.96	81.6 ± 16.5	21.1	NS
Markies	22.0 ± 8.10	88.6 ± 13.2	24.8	16.8 ± 5.50	65.5 ± 13.3	25.6	NS
Pentland Dell	25.7 ± 2.19	122 ± 3.21	21.1	19.4 ± 1.48	88.0 ± 8.77	22.0	∗
Ramos	35.3 ± 4.74	137 ± 15.5	25.8	22.4 ± 5.79	84.0 ± 11.9	26.6	∗
Russet Burbank	37.5 ± 7.48	145 ± 24.8	26.0	29.8 ± 3.00	102 ± 8.51	29.3	NS
Umatilla Russet	29.6 ± 4.62	136 ± 27.9	21.7	19.4 ± 9.07	86.3 ± 28.7	22.4	NS
Harmony	21.7 ± 0.88	96.4 ± 1.22	22.5	13.3 ± 1.86	81.9 ± 4.52	16.3	∗∗

^aSignificant effect of storage time on asparagine concentration (^∗p < 0.05, ^∗∗p < 0.01 and ^∗∗∗p < 0.001; NS, not significant).

^bExcludes arginine.