Optimizing use of U.S. Ex-PVP inbred lines for enhancing agronomic performance of tropical Striga resistant maize inbred lines

Maazou, Abdoul-Raouf Sayadi; Gedil, Melaku; Adetimirin, Victor O.; Mengesha, Wende; Meseka, Silvestro; Ilesanmi, Oluyinka; Agre, Paterne A.; Menkir, Abebe

doi:10.1186/s12870-022-03662-1

Table 1 Mean squares from the analysis of variance of grain yield and agronomic traits of testcrosses of 24 Ex-PVP maize inbred lines evaluated in 2020 and 2021 under Striga-infested, Striga non-infested, and across multiple test locations in Nigeria

From: Optimizing use of U.S. Ex-PVP inbred lines for enhancing agronomic performance of tropical Striga resistant maize inbred lines

Source of variation	DF	Grain yield	Striga damage^a	Emerged Striga count^a	Days to anthesis	Days to silking	Plant height	Ear height	Ear aspect
*Striga-infested*
Environment (Env)	3	122,335,306.8†	98.5†	11,269.52†	863.85†	659.68†	18,515.6†	11,695.48†	0.57**
REP (Env)	4	2,694,269.2***	25.62†	206.12	26.8†	18.07†	976.45†	623.99†	0.14
Block (Env × Rep)	96	986,111.1†	1.4**	294.37*	3.39**	3.75	244.74***	154.38†	0.15*
Hybrid (H)	51	2,603,929.2†	2.78†	562.94†	6.33†	6.9†	313.82†	57.22	0.31†
Line (GCA)	23	2,318,317.1†	3.44**	668.53†	14.76†	16.34†	449.46***	123.5	0.31†
Tester (GCA)	1	76,415,103.6†	109.44†	1197.09*	14.64*	2.04	10,478.73†	112.73	0.17
Line × Tester (SCA)	23	1,510,019.5**	0.89	172.62	3.35	4.12	328.83*	55.87	0.21*
Hybrid × Env	153	711,692.3**	0.91	239.5	2.02	2.47	113.11	68.09	0.17**
Line × Env	69	779,993.7	1.16	134.78	2.58	2.74	159.58	135.37	0.3†
Tester × Env	3	3,582,002.6**	4.66*	489.93	7.29	3.02	544.25*	231.87	0.11
Line × Tester × Env	69	720,595.4	0.85	204.78	2.36	2.68	147.14	71.58	0.17
Error	108	451,673.1	0.8	200.58	2.04	2.7	13,128.66	48.73	0.1
Repeatability		0.81	0.79	0.66	0.81	0.79	0.73	0	0.55
CV (%)		24.41	14	65	2.5	2.8	6.99	10.15	10.8
Source of variation	DF	Grain yield	Days to anthesis	Days to silking	Plant height	Ear height	Ear aspect	Plant aspect
*Striga non-infested*
Environment (Env)	5	903,160,592†	1397.35†	1478.52†	145,453.01†	29,314.14†	3.4†	5.86†
REP (Env)	6	16,528,463†	24.4†	25.65†	2058.44†	1193.58†	0.33*	1.55†
Block (Env × Rep)	144	1,749,268**	2.81***	3.39***	335.66***	203.54†	0.14	0.2
Hybrid (H)	51	4,406,667†	13.48†	14.26†	533.03†	239.63†	0.68†	0.41***
Line (GCA)	23	9,373,757†	19.31†	18.56†	843.76†	283.43*	1.17†	0.61†
Tester (GCA)	1	24,317,974***	159.39†	82.93†	14,410†	491.36	3.21†	3.35***
Line × Tester (SCA)	23	2,890,278*	4.47*	5.63*	309.84	300.61**	0.18	0.34
Hybrid × Env	255	1,208,517	2.19*	2.26	191.3	108.22	0.13	0.28**
Line ×Env	115	1,888,242	3.12	3.49	244.28	172.34	0.14	0.29
Tester × Env	5	3,397,689	10.41**	6.79	852.68*	176.23	0.65***	0.53
Line × Tester × Env	115	1,315,022	2.24	1.99	199.52	132.81	0.16	0.25
Error	162	1,065,614	267.08	1.9	196.6	95.17	0.12	0.17
Repeatability		0.79	0.89	0.9	0.76	0.64	0.83	0.49
CV (%)		19.35	2.29	2.41	7.34	12.21	12.69	15.26
*Across multiple test locations*
Environment (Env)	9	731,610,903†	1110.18†	1116.71†	116,659.67†	25,238.34†	3.2†
REP (Env)	10	10,994,785†	25.36†	22.61†	1625.65†	1051.18†	0.27*
Block (Env × Rep)	240	1,444,005†	3.04†	3.53***	299.3†	191.25†	0.15*
Hybrid (H)	51	5,814,128†	18.6†	19.56†	681.73†	215.89†	0.78†
Line (GCA)	23	8,745,093†	32.34†	32.61†	1145.12†	312.89**	1.18
Tester (GCA)	1	87,217,218†	148.83†	†63.44	24,857.81†	195.02	1.5***
Line × Tester (SCA)	23	3,474,128†	5.66**	7.15**	457.67*	290.19**	0.25**
Hybrid × Env	459	1,062,000*	2.03	2.25	162.59	97.96	0.15**
Line ×Env	207	1,642,063*	2.79	3.1	205.04	155.96	0.2
Tester × Env	9	4,561,533***	11.01**	7.19*	654.78**	218.23	0.67
Line × Tester × Env	207	1,071,283	2.27	2.29	180.12	114.89	0.16*
Error		821,877	1.8	2.22	167.2	83.72	0.11
Repeatability		0.86	0.93	0.93	0.85	0.64	0.83
CV (%)		21.06	2.38	2.58	7.26	11.86	12.05

DF Degree of freedom, ^a10 weeks after planting
^*, **, ***, † Significant at probability < 0.05, 0.01, 0.001 and 0.0001 levels, respectively

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