Genetic Variability for the Yield and Yield-Related Traits in Some Maize (Zea mays L.) Inbred Lines in the Central Highland of Ethiopia

Table 9

Path coefficient analysis showing direct (diagonal bold) and indirect (off-diagonal) effects on the grain yield per plant at the phenotypic level in maize inbred lines.

N/S	Traits	LL	LW	NTB	EL	NKPR	NEPP	GYPH	AGBYPP	HI	r p
1	LL	−0.0410	−0.0144	0.0004	−0.0824	−0.0051	−0.0173	0.0005	−0.0991	0.0199	0.321
2	LW	−0.0037	−0.1580	0.0004	−0.0729	−0.0058	−0.0197	0.0006	−0.1125	0.0226	0.284
3	NTB	−0.0037	−0.0126	0.0050	−0.0719	−0.0021	−0.0073	0.0020	−0.0419	0.0084	0.280
4	EL	−0.0041	−0.0141	0.0004	−0.8180	−0.0092	−0.0313	0.0010	−0.1793	0.0360	0.314
5	NKPR	−0.0051	−0.0173	0.0005	−0.0991	1.0570	−0.0096	0.0242	0.2567	0.0199	0.386
6	NEPP	−0.0058	−0.0197	0.0006	−0.1125	0.1787	−0.0570	0.0275	0.2913	0.0226	0.438
7	GYPH	−0.0092	−0.0313	0.0010	−0.1793	0.2848	−0.0174	0.0900	0.4642	0.0360	0.698
8	AGBYP	−0.0100	−0.0341	0.0011	−0.1955	0.3105	−0.0190	0.0478	0.8740	0.0392	0.761
9	HI	−0.0062	−0.0212	0.0007	−0.1215	0.1930	−0.0118	0.0297	0.3146	0.1090	0.473

and = significant and highly significant at 5% and 1%, respectively. Note. LL = leaf length (cm), LW = leaf width, NTB = number of tassel branches, El = ear length (cm), NKPR = number of kernel per row, NEPP = number of ears per plant, GYPP = grain yield per plant (g), GYPH = grain yield per hectare (kg), AGBYPP = aboveground biomass yield per plant (g), HI = harvest index, and S/N = serial number. Bold values represents the direct effects of different traits on the grain yield per plant.