Table 2 Mean squares of different traits of early maturing yellow maize hybrids planted under four Striga-infested and seven optimal environments in 2015 and 2016.

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

Source	DF	YIELD	POLLEN	DYSK	ASI	PLHT	EASP	EPP	SDR8	SDR10	ESP8	ESP10
*Striga* -infested environments
Env	3	320119378**	942.34**	1142.62**	34.24**	190066.61**	45.53**	1.05**	113.07**	18.99**	331.12**	347.02**
Rep (Env)	4	6309005**	57.53**	63.32**	2.59	426.16	3.72**	0.07**	2.50**	2.55**	5.49**	1.30**
Block (Env*Rep)	104	3503982**	7.45**	15.66**	3.58**	710.50**	1.20**	0.03**	1.77**	1.50**	1.12**	4.52**
Hybrid	209	2678317**	17.63**	25.84**	3.36**	732.76**	1.05**	0.05**	1.05**	1.22**	1.15**	0.95**
GCA-line	40	5193282**	39.82**	60.80**	7.14**	810.67**	1.83**	0.10**	2.48**	3.01**	1.02*	1.37**
GCA-tester	4	15636636**	286.88**	425.17**	24.91**	8360.67**	4.12**	0.68**	9.99**	8.15**	13.15**	11.74**
SCA	160	2151012**	8.43**	12.12**	2.77*	587.13**	0.84**	0.03**	0.70	0.88**	1.10**	0.83**
Env*Hybrid	627	1437116**	5.25**	7.98**	2.34**	518.62**	0.66**	0.02**	0.63**	0.74**	0.66*	0.55
Env*GCA-line	120	2187966**	8.49**	11.98**	2.35	502.56**	0.92**	0.03**	0.88**	1.23**	0.90**	0.75
Env*GCA- tester	12	11183847**	11.19**	29.38**	7.27**	2042.02**	3.32**	0.14**	2.93**	5.28**	1.82**	0.68
Env*SCA	480	1295966	5.67**	8.31**	2.43	509.22**	0.64	0.02	0.66	0.68	0.73	0.61
Error	819	1311421	3.48	6.57	2.15	360.38	0.58	0.02	0.64	0.67	0.66	0.61
Optimal environments
Source									PASP
Env	6	387535840**	1011.15**	1086.44**	41.71**	166127.89**	14.74**	1.35**	49.03**
Rep(Env)	7	15534957**	30.99**	37.65**	0.79	2376.10**	3.60**	0.09**	0.57
Block(Env*Rep)	182	2197072**	4.01**	4.80**	0.52	470.32**	0.83**	0.03**	0.82**
Hybrid	209	10921000**	31.09**	45.36**	2.47**	1463.83**	3.21**	0.04**	3.76**
GCA-line	40	18278629**	122.93**	196.62**	9.33**	1722.24**	4.09**	0.05**	5.89**
GCA-tester	4	224468759**	261.14**	275.63**	4.69**	49584.85**	73.22**	0.07**	91.72**
SCA	160	4393834**	6.35**	7.11**	0.95**	470.95**	1.49**	0.04**	1.27**
Env*Hybrid	1254	1561670**	4.31**	5.77**	0.66**	350.76**	0.53**	0.03**	0.50**
Env*GCA-line	240	2534630**	13.35**	19.88**	1.25**	446.93**	0.75**	0.03**	0.68**
Env*GCA- tester	24	3485354**	13.75**	11.29**	0.90**	3966.25**	2.10**	0.06**	1.52**
Env*SCA	960	1481235**	2.67**	3.10**	0.55*	292.22**	0.52*	0.03**	0.51**
Error	1434	1031410	1.82	2.27	0.49	203.04	0.46	0.02	0.41

*^,**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; SDR8 and SDR10 = Striga damage rating at 8 and 10 WAP; ESP8 and ESP10 = number of emerged Striga plants at 8 and 10 WAP.

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Table 2 Mean squares of different traits of early maturing yellow maize hybrids planted under four Striga-infested and seven optimal environments in 2015 and 2016.

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