High-throughput method for ear phenotyping and kernel weight estimation in maize using ear digital imaging

Table 2 Broad-sense heritabilities (H²) and means for grain yield and kernel/ear attributes estimated through imaging for six maize trials with three replicates evaluated under low soil nitrogen at Harare, Zimbabwe

Trial	Number of		Measured Grain yield(Mg ha⁻¹)	Broad-sense heritability (H²)
	Number of			Kernel attributes								Ear attributes
	Entries (hybrids)	Year		Visible Kernel Number	Mean width (cm)	Mean length (cm)	Total area (cm²)	Mean area (cm)	Mean perimeter (cm)	Total Number per plot	Total Weight (g plot⁻¹)	Number per plot	Mean length (cm)	Mean width (cm)
EHYB1746	50	2017	0.591	0.374	0.725	0.815	0.439	0.71	0.842	0.374	0.301	0.781	0.665	0.507
EHYB1747	50	2017	0.596	0.619	0.657	0.761	0.513	0.722	0.765	0.619	0.492	0.358	0.728	0.634
EHYB1748	50	2017	0.595	0.624	0.709	0.624	0.687	0.69	0.569	0.597	0.700	0.746	0.539	0.278
IHYB1747	50	2017	0.599	0.721	0.737	0.693	0.423	0.607	0.735	0.721	0.442	0.515	0.652	0.504
LHYB1619	55	2016	0.146	0.541	0.904	0.930	0.238	0.917	0.934	0.541	0.320	0.647	0.560	0.730
LHYB1617	55	2016	0.137	0.314	0.798	0.830	0.384	0.782	0.903	0.314	0.287	0.450	0.279	0.239
Mean			0.444	0.532	0.755	0.775	0.447	0.738	0.769	0.527	0.423	0.582	0.570	0.482
				Mean
EHYB1746	50	2017	4.02	4510.01	0.36	0.66	760.64	0.17	1.85	9243.27	3001.43	24.51	14.95	4.81
EHYB1747	50	2017	5.48	5337.80	0.35	0.65	858.42	0.16	1.81	10941.06	3452.16	28.22	14.71	4.70
EHYB1748	50	2017	2.60	4781.87	0.36	0.67	801.47	0.14	1.91	9800.89	3237.06	27.88	14.42	4.66
IHYB1747	50	2017	5.20	5398.55	0.34	0.63	824.45	0.15	1.77	11065.71	3318.40	28.05	14.34	4.64
LHYB1619	55	2016	2.24	3789.83	0.42	0.76	852.04	0.23	2.31	7766.21	2415.55	21.77	16.43	5.23
LHYB1617	55	2016	1.36	3151.16	0.35	0.60	435.25	0.14	2.02	4420.99	1126.73	23.18	11.17	3.93

EHYB early hybrid trial, IHYB intermediate hybrid trial, LHYB late hybrid trial

ISSN: 1746-4811