Table 2.
Variability of crude protein (CP) and amino acids among seven origins of wheat (%, as-is basis)

Origin	Amino acids (%)
	CP	Lys	Met	Cys	Thr	Met:Lys	Cys:Lys	Thr:Lys
Within country
Australia
n1	12	8	8	8	8	8	8	8
Average	11.70	0.27	0.16	0.23	0.30	0.59	0.89	1.13
CV2	11.77	6.69	15.03	10.95	5.04	15.80	12.44	4.11
Brazil
n1	15	9	9	9	9	9	9	9
Average	13.26	0.29	0.17	0.26	0.32	0.57	0.89	1.12
CV2	8.55	12.31	19.21	12.83	14.42	10.89	3.91	9.29
Canada
n1	7	5	5	5	5	5	5	5
Average	12.76	0.28	0.16	0.23	0.33	0.56	0.83	1.15
CV2	8.78	13.32	20.07	9.84	12.76	21.94	13.69	5.18
China
n1	11	11	11	11	11	11	11	11
Average	13.10	0.34	0.17	0.29	0.33	0.51	0.83	0.98
CV2	2.79	7.2	13.5	13.4	12.8	11.0	10.7	14.7
India
n1	13	6	6	6	6	6	6	6
Average	11.70	0.26	0.14	0.24	0.30	0.54	0.93	1.17
CV2	3.94	16.22	10.21	13.12	11.09	11.27	8.92	6.70
Ukraine
n1	13	10	10	10	10	10	10	10
Average	10.55	0.30	0.16	0.25	0.29	0.55	0.86	0.99
CV	9.92	17.32	15.81	15.74	10.04	20.36	15.31	10.78
USA
n1	12	7	7	7	7	7	7	7
Average	10.83	0.27	0.14	0.24	0.28	0.54	0.90	1.07
CV2	7.23	4.17	7.86	8.87	4.92	9.40	12.00	5.09
NRC (2012)
n1	64	34	29	26	32
Average	14.46	0.39	0.22	0.33	0.40	0.56	0.85	1.03
INRA (2003)
n1	7,068	7,068	7,068	7,068	7,068
Average	10.50	0.31	0.17	0.26	0.32	0.55	0.84	1.03
Among countries
n	83	56	56	56	56	56	56	56
Minimum	10.55	0.26	0.14	0.23	0.28	0.51	0.83	0.98
Maximum	13.26	0.34	0.17	0.29	0.33	0.59	0.93	1.17
Average3	11.95	0.29	0.16	0.25	0.31	0.55	0.87	1.07
CV2	9.06	10.04	8.23	7.56	6.34	4.74	4.02	7.05
SEM4	0.961	0.034	0.024	0.032	0.035	0.082	0.100	0.098
P-value	<0.001	<0.001	0.053	0.011	0.024	0.475	0.506	0.001

Values represent the number of observations of nutrient contents in wheat to the corresponding country of origins or the publications.
CV=coefficient of variation.
Average values are calculated as a weighted average.
SEM=standard error of the mean.