Table 1 Twelve environments representing combinations of diverse agronomic management (drought or full irrigation, sowing in standard, bed, or flat systems), sites in Mexico, and years for two traits, grain yield (GY) and days to heading (DTH), with their broad-sense heritability (h²) measured in 2010

Environment Code	Agronomic Management	Site in Mexico	Year	Trait Measured	h² (GY)	h² (DTH)
1	Drought-bed	Cd. Obregon	2009	GY, DTH	—	—
2	Drought-bed	Cd. Obregon	2010	GY, DTH	0.833	0.991
3	Drought-flat	Cd. Obregon	2010	GY, DTH	0.465	0.984
4	Full irrigation-bed	Cd. Obregon	2009	GY, DTH	—	—
5	Full irrigation-bed	Cd. Obregon	2010	GY, DTH	0.832	0.086
6	Heat-bed	Cd. Obregon	2010	GY	0.876	—
7	Full irrigation-flat melga	Cd. Obregon	2010	GY	0.876	—
8	Standard	Toluca	2009	DTH	—	—
9	Standard	El Batan	2009	DTH	—	—
10	Small observation plot	Cd. Obregon	2009	DTH	—	—
11	Small observation plot	Cd. Obregon	2010	DTH	—	0.950
12	Standard	Agua Fria	2010	DTH	—	0.990