Correlation and Path Coefficient Analysis in Yield and Yield-Related Components of Black Cumin (Nigella Sativa L.) Accessions, at Jimma, Southwest Ethiopia

Table 4

Genotypic path analysis of the direct (bold) and indirect (off diagonal) effects of 16 traits on seed yield.

	BLM	PBR	SBR	TBR	TOBR	GRZ	HT	BY	NEC	HI	RG
BLM	−0.043	0.098	−0.182	−0.349	0.426	0.011	0.005	−0.074	−0.065	−0.161	−0.334
PBR	−0.009	0.487	0.803	0.189	−1.486	0.043	−0.092	0.279	0.210	0.099	0.522
SBR	0.007	0.357	1.094	0.477	−1.949	0.035	−0.089	0.295	0.253	0.247	0.728
TBR	0.023	0.142	0.805	0.649	−1.610	0.014	−0.052	0.080	0.156	0.311	0.518
TOBR	0.009	0.364	1.075	0.526	−1.985	0.035	−0.089	0.254	0.245	0.272	0.706
GRZ	−0.009	0.394	0.711	0.169	−1.287	0.053	−0.084	0.256	0.213	0.162	0.579
HT	0.002	0.343	0.742	0.256	−1.347	0.034	−0.131	0.210	0.266	0.345	0.720
BY	0.004	0.177	0.421	0.068	−0.659	0.018	−0.036	0.765	0.144	−0.473	0.429
NEC	0.009	0.314	0.850	0.311	−1.496	0.035	−0.107	0.338	0.325	0.301	0.880
HI	0.008	0.058	0.323	0.241	−0.643	0.010	−0.054	−0.432	0.117	0.839	0.466

Residual effect = 0.242268. BLM = days to 50% blooming, PBR = number of primary branches, SBR = number of secondary branches, TBR = number of tertiary branches, TOBR = number of total branches, GRZ = girth (thickness), HT = stem height, BY = biological yield, NEC = number of effective capsules per plant, HI = harvesting index, YH = seed yield ha⁻¹, and RG = genotypic correlation.