Table 1 Mean squares of different traits of early maturing yellow maize hybrids assessed under three drought and three low N environments in 2015 2016.

From: Testcross performance and combining ability of early maturing maize inbreds under multiple-stress environments

Source	DF	YIELD	POLLEN	DYSK	ASI	PLHT	PASP	EASP	EPP	STGR
Drought
Env	2	933552083**	2086.49**	6098.90**	1021.91**	53273.71**	258.97**	106.02**	6.51**	338.22**
Rep (Env)	3	20086749**	195.90**	296.77**	24.70**	5387.75**	11.84**	9.69**	0.10*	45.91**
Block (Env*Rep)	78	2154489**	9.75**	11.11**	2.38	1016.06**	1.74**	1.54**	0.05**	2.23**
Hybrid	209	2353347**	15.41**	19.15**	3.72**	1294.89**	1.35**	1.48**	0.05**	1.78**
GCA-line	40	3598950**	39.18**	52.83**	5.48**	1052.83**	1.64**	2.17**	0.06**	3.29**
GCA-tester	4	12314941	174.31**	159.24**	25.88**	41254.00**	10.64**	10.60**	0.08	12.51**
SCA	160	1808932**	7.92**	9.51	2.98	454.15	0.95	1.11*	0.05*	1.33
Env*Hybrid	418	1248052**	7.07**	9.55**	3.47**	293.68	0.98**	0.91**	0.04**	1.43
Env*GCA-line	80	1500763**	13.63**	15.74**	4.30**	335.88	1.27*	1.53**	0.05*	1.66
Env*GCA-tester	8	8997020**	14.19**	37.24**	15.62**	1863.65**	3.36**	4.89**	0.20**	4.24**
Env*SCA	320	1174788	6.72*	8.71	3.12*	363.44	0.93	0.80	0.04	1.55
Error	614	1034603	5.48	8.40	2.58	387.33	0.90	0.86	0.04	1.51
Low soil nitrogen
Env	2	469014141**	442.25**	90.19**	195.57**	501625.38**	35.92**	5.01**	2.36**	885.74**
Rep (Env)	3	8815749**	10.96**	25.60**	9.23**	3413.71**	7.89**	2.31**	0.33**	5.64**
Block (Env*Rep)	78	768071**	3.53**	3.45**	0.57	560.14**	1.20**	0.98**	0.02**	1.53**
Hybrid	209	1720841**	14.57**	15.41**	1.21**	924.39**	1.26**	0.98**	0.02**	0.96**
GCA-line	40	3055246**	34.11**	41.33**	2.87**	1002.56**	1.36**	1.14**	0.04**	1.27**
GCA-tester	4	10821013**	200.27**	184.11**	2.76**	28223.65**	23.39**	10.37**	0.15**	8.59**
SCA	160	1479947**	7.11**	6.71**	0.92**	391.09**	1.02**	0.91**	0.02	0.89**
Env*Hybrid	418	753036**	3.54**	3.65**	0.62*	416.24**	0.46	0.48**	0.02	0.69**
Env*GCA-line	80	1135984**	6.84**	8.04**	1.11**	505.95**	0.66	0.61*	0.02	1.09**
Env*GCA- tester	8	4985611**	8.80**	7.54**	1.69**	6639.60**	1.25*	3.83**	0.06**	3.30**
Env*SCA	320	680550**	3.20**	3.04**	0.58	282.16	0.48	0.43	0.02	0.74**
Error	614	396887	1.75	1.94	0.56	282.36	0.53	0.47	0.02	0.59

*^,**Significant at 0.05 and 0.01 probability levels, respectively; Env = environment; Rep = replication; YIELD = Grain yield (kg ha⁻¹); Pollen = days to 50% anthesis; DYSK = days to 50% silking; ASI = anthesis-silking interval; PLHT = plant height (cm); PASP = plant aspect; EASP = ear aspect; EPP = ears per plant; STGR = stay-green characteristic.

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Table 1 Mean squares of different traits of early maturing yellow maize hybrids assessed under three drought and three low N environments in 2015 2016.

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