Genetic variability and trait associations in bread wheat (Triticum aestivum L.) genotypes under drought-stressed and well-watered conditions

Sewore, Birhanu Mecha; Abe, Ayodeji

doi:10.1186/s43170-024-00259-6

CABI Agriculture and Bioscience

Table 9 Genotypic correlation-based direct (on the diagonal) and indirect effects of 15 agronomic traits on grain yield of 196 bread wheat genotypes evaluated under well-watered conditions in field and greenhouse environments for two years

From: Genetic variability and trait associations in bread wheat (Triticum aestivum L.) genotypes under drought-stressed and well-watered conditions

Traits	DH	GFP	DM	PH	NTPP	SL	FLA	SPS	FSPS	NKPS	SF	BMY	HI	KWS	TKW	GY
DH	− 0.19	0.21	0.65	0.03	− 0.05	0.22	0.16	− 0.63	− 0.58	0.26	− 0.40	− 0.17	− 0.30	0.14	− 0.07	0.325**
GFP	0.79	0.16	− 0.79	0.07	− 0.26	0.37	− 0.69	0.59	0.80	− 0.68	− 0.12	− 0.82	0.38	0.54	0.24	0.523**
DM	− 0.91	0.50	0.39	0.06	− 0.10	0.30	0.02	− 0.29	− 0.60	0.19	− 0.48	− 0.54	− 0.27	0.68	− 0.13	0.168**
PH	− 0.17	− 0.03	0.41	− 0.33	− 0.03	0.22	− 0.28	0.29	0.47	0.47	0.47	− 0.60	0.13	− 0.09	0.10	0.16*
NTPP	− 0.86	− 0.92	0.23	0.07	0.15	− 0.26	− 0.52	0.15	0.11	0.39	0.08	− 0.11	0.21	− 0.21	− 0.77	0.28**
SL	0.90	0.47	− 0.60	− 0.06	− 0.16	0.37	− 0.44	0.70	0.82	− 0.27	0.91	0.18	0.24	− 0.09	0.25	0.23**
FLA	− 0.75	0.67	0.67	− 0.10	0.09	0.59	0.28	0.38	0.05	0.59	0.66	0.39	0.34	− 0.56	0.04	199**
SPS	0.47	− 0.57	− 0.93	0.19	− 0.19	− 0.79	0.05	0.39	0.74	1.00	0.41	− 0.88	0.22	0.36	− 0.45	0.79**
FSPS	0.58	− 0.12	− 0.37	0.19	− 0.21	− 0.80	0.08	0.34	0.46	− 0.01	0.51	− 0.95	0.21	0.38	0.46	0.87**
NKPS	0.58	− 0.12	− 0.37	0.19	− 0.21	− 0.80	0.08	0.34	0.68	0.12	0.58	− 0.94	0.27	0.33	− 0.42	0.76**
SF	0.40	0.71	− 0.41	0.08	− 0.32	− 0.55	0.30	0.77	0.92	− 0.50	0.52	− 0.45	0.05	0.30	− 0.19	0.72**
BMY	− 0.33	− 0.58	0.25	0.06	− 0.10	0.06	− 0.10	0.52	0.23	0.02	0.02	0.69	0.26	0.89	0.63	0.92**
HI	− 0.55	0.37	0.11	− 0.06	0.04	0.36	− 0.40	− 0.06	− 0.10	0.86	− 0.11	0.14	0.56	− 0.36	0.28	0.75**
KWS	− 0.36	− 0.56	0.78	− 0.14	− 0.19	0.04	− 0.19	0.19	0.21	− 0.97	0.44	0.66	0.11	0.60	0.27	0.93**
TKW	− 0.50	− 0.65	0.49	− 0.03	− 0.10	0.26	− 0.03	0.16	0.89	− 0.16	0.42	0.79	− 0.19	0.91	0.64	0.96**

Residual effect = 0.0251
ns non-significant, DH Days to heading, GFP Grain filling period (days), DM Days to maturity, PH Plant height (cm), NTPP Number of tillers plant⁻¹, SL Spike length (cm), FLA Flag leaf area (cm²), SPS Spikelets spike⁻¹, FSPS Fertile spikelets spike⁻¹, NKPS Number of kernels spike⁻¹, SF Spike fertility (%), BMY Biomass yield (t ha⁻¹), HI Harvest index (%), KWS Kernels weight spike ⁻¹ (g), TKW Thousand kernels weight (g), and GY Grain yield (t ha⁻¹)
**Highly significant, *significant
Bold diagonal numbers indicated genotypic correlation-based direct effects of agronomic traits on yield under well-watered condition

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ISSN: 2662-4044

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