Table 1.

Mean tendency of a parameter (T_parameter), |r| to yield and to P_i,yield and parameter (R² and slope) of linear regression of |r| to yield versus |r| to P_i,yield from six physiological parameters from 100 SPG in Fig. 4

Sampling method	Physiological parameter	Tparameter	|r| to yield	|r| to Pi,yield	R2	Slope
Even	y_rue	1.01 ± 0.01	0.76 ± 0.04	0.77 ± 0.03	0.96	0.96
Random	y_rue	1.16 ± 0.08	0.39 ± 0.08	0.45 ± 0.08	0.95	0.94
Top 20	y_rue	1.55 ± 0.93	0.20 ± 0.09	0.27 ± 0.10	0.72	0.88
Even	y_sla	1.01 ± 0.01	0.64 ± 0.05	0.65 ± 0.05	0.98	0.96
Random	y_sla	1.28 ± 1.44	0.24 ± 0.10	0.26 ± 0.10	0.94	0.96
Top 20	y_sla	1.28 ± 0.77	0.20 ± 0.09	0.22 ± 0.09	0.75	0.91
Even	ll_modifier	0.77 ± 0.10	0.27 ± 0.07	0.21 ± 0.07	0.99	1.02
Random	ll_modifier	0.82 ± 0.10	0.47 ± 0.09	0.39 ± 0.10	0.91	1.11
Top 20	ll_modifier	8.52 ± 65.02	0.13 ± 0.08	0.10 ± 0.07	0	− 0.05
Even	potential_grain_filling_rate	0.98 ± 0.02	0.56 ± 0.06	0.55 ± 0.06	0.98	1.03
Random	potential_grain_filling_rate	0.87 ± 0.12	0.29 ± 0.10	0.26 ± 0.10	0.96	0.98
Top 20	potential_grain_filling_rate	0.85 ± 0.12	0.48 ± 0.06	0.41 ± 0.08	0.52	0.96
Even	node_no_correction	0.78 ± 0.20	0.18 ± 0.06	0.15 ± 0.06	0.96	0.98
Random	node_no_correction	0.93 ± 0.90	0.21 ± 0.09	0.18 ± 0.09	0.95	0.96
Top 20	node_no_correction	0.67 ± 0.14	0.43 ± 0.07	0.29 ± 0.09	0.63	1.05
Even	tfac_slope	1.01 ± 0.03	0.35 ± 0.06	0.35 ± 0.06	0.98	1.02
Random	tfac_slope	2.15 ± 6.94	0.09 ± 0.07	0.09 ± 0.07	0.8	0.82
Top 20	tfac_slope	1.71 ± 0.59	0.23 ± 0.08	0.37 ± 0.08	0.73	0.82

Meaning of the physiological parameters (in italic) follow the order (left to right in Fig. 4): radiation use efficiency (y_rue), potential leaf specific area (y_sla), efficiency of roots to extract soil water (ll_modifier), potential grain growth rate at grain filling (potential_grain_filling_rate), number of growing leaves in the sheath (node_no_correction) and temperature effect on biomass accumulation (tfac_slope).