Table 4. Expected genetic gains per selection cycle for the PSI and GSI for cycle 0 and cycles 0, 1, and 2, respectively, for four traits (GY, EHT, PHT, and AD) in four maize (Zea mays) ${\text{F}}_{\text{2}}$ populations when the generation interval was included.

Traits	Data Set 3				Data Set 4
	PSI Cycle	GSI Cycles			PSI Cycle	GSI Cycles
	0	0	1	2	0	0	1	2
GY, kg/ha	102.5	153.8	137.8	120.4	195.0	550.7	471.4	461.4
EHT, cm	−1.73	−4.03	−3.43	−3.30	−1.16	−3.10	−2.63	−2.57
PHT, cm	−0.70	−4.30	−3.65	−3.73	−0.46	−1.18	−1.02	−0.99
AD, d	−0.04	−0.10	−0.04	−0.10	1.50	4.10	3.50	3.41
PSI or GSI responses	1.57	3.37	2.85	2.80	1.33	4.09	3.49	3.41

	Data Set 5				Data Set 6
GY, kg/ha	320.5	401.5	433.9	285.6	93.1	222.4	230.1	194.7
EHT, cm	−2.09	−7.71	−0.75	−4.69	−0.57	−1.77	−1.15	−1.21
PHT, cm	−1.01	−0.34	−2.54	−0.78	−0.90	−1.65	−0.96	−1.07
AD, d	2.43	3.72	3.34	2.67	0.90	2.38	1.90	1.78
PSI or GSI responses	2.04	8.62	3.33	2.47	1.88	6.92	1.90	1.78

The last line of each subtable shows the estimated PSI (cycle 0) selection response, and the estimated GSI (cycles 0, 1, and 2) selection responses. PSI, phenotypic selection index; GSI, genomic selection index; GY, grain yield; EHT, ear height; PHT, plant height, AD, anthesis days.