Table 1.

Percentages of genotype × environment interaction variation explained by linear function and four non-linear functions in barley cultivar trials in Alberta tested in 1995–2003.

Year	Linear	Logistic	Parabola	Normal	Cauchy
1995	8.49	7.52	11.10	11.47	20.17
1996	8.84	7.32	14.14	13.06	25.28
1997	6.72	5.88	11.81	9.97	12.54
1998	8.40	7.70	13.15	15.12	26.54
1999	14.70	15.75	20.41	20.85	36.56
2000	5.91	8.34	8.67	14.30	32.39
2001	6.95	11.77	13.16	35.04	86.45
2002	23.60	13.17	40.08	33.46	84.87
2003	17.71	14.06	22.51	18.88	37.69
Average	11.26	10.17	17.23	19.13	40.28