Table 5.

Coefficients of the regression between yield and environmental index for seven potato varieties.

Cultivar	Average yield*	Regression parameters in function of the environmental index (E. index)
		yield vs. E. index			number of tubers vs. E. index			weight of individual tuber vs. E. index
		R2	b (slope)	p	R2	b (slope)	p	R2	b (slope)	p
Desiree	54.7 ± 17.5	0.46	0.91	<0.0001	0.28	NC	0.0026	0.5	0.73	<0.0001
Karú-INIA	58.7 ± 14.4	0.58	0.69	<0.0001	0.16	NC	>0.05	0.49	0.58	<0.0001
Patagonia-INIA	76.2 ± 19.9	0.75	1.13	<0.0001	0.05	NC	>0.05	0.86	0.76	<0.0001
Puyehue-INIA	67.25 ± 18.5	0.51	0.86	<0.0001	0.05	NC	>0.05	0.61	0.54	<0.0001
Yagana-INIA	59.69 ± 18.1	0.49	0.83	<0.0001	0.09	NC	>0.05	0.59	0.51	<0.0001
Yaike	73.28 ± 23.4	0.61	1.19	<0.0001	0.05	NC	>0.05	0.81	0.59	<0.0001
Porvenir	79.42 ± 17.9	0.74	0.94	<0.0001	0.06	NC	>0.05	0.67	0.72	<0.0001

^*Average yield for all years and treatments.