Genetic Variability of Coffee (Coffea arabica L.) Germplasm in Biennial Bearing and Its Influence on Selection Efficiency

Table 3

Variability and genetic parameters for yield performance and bienniality.

Locations	GP	2016	2017		2018		2019		2020		Mean
		YLD	YLD	I2	YLD	I3	YLD	I4	YLD	I5	YLD
Tepi	GCV	18.40	22.78	33.76	13.55	24.70	29.95	16.86	37.90	16.88	17.57
	PCV	45.04	48.80	37.93	54.64	30.71	37.77	24.67	40.24	24.43	35.51
	GA	89.23	198.13	0.18	66.56	0.08	228.91	0.06	504.84	0.07	128.74
	GAM	15.41	21.79	61.60	6.89	40.71	48.70	23.62	73.18	23.92	17.81
	H	16.69	21.78	79.22	6.15	64.65	62.90	46.71	88.71	47.75	24.46
	Mean	579.08	909.22	0.28	965.91	0.21	470.01	0.26	689.91	0.27	722.82
	CV (%)	41.11	43.16	17.29	52.94	18.26	23.00	18.01	13.52	17.66	30.87
	F-test	ns	ns		ns	ns	ns	ns		ns	ns
	CD (0.05)	1227	2023	0.25	2636	0.19	55	0.24	481	0.25	1150
	GP	2017	2018		2019		2020				Mean
		YLD	YLD	I2	YLD	I3	YLD	I4			YLD
Gera	GCV	11.60	14.12	24.49	12.64	19.89	26.69	18.02	—	—	14.48
	PCV	17.31	29.24	44.46	28.49	33.11	33.08	29.54	—	—	20.84
	GA	229.02	104.10	0.10	250.91	0.10	909.16	0.081	—	—	331.37
	GAM	16.01	14.05	27.66	11.54	24.50	44.36	22.54	—	—	20.73
	H	44.90	23.32	30.35	19.67	36.09	65.11	37.22	—	—	48.28
	Mean	1430.88	741.04	0.36	2173.63	0.42	2049.46	0.357	—	—	1598.75
	CV (%)	25.69	51.20	74.21	51.08	52.94	39.08	46.8	—	—	29.97
	F-test	ns	ns	ns	ns	ns		ns	—	—	ns
	CD (0.05)	1197	1235	0.86	3615	0.72	2608	0.54	—	—	1560

GP: genetic parameters, GCV: genetic coefficient of variation, PCV: phenotypic coefficient of variation, GA: genetic advance, H: heritability, YLD: yield, I2: biennial bearing intensity between 2016 and 2017 (I3: between 2017 and 2018, I4: between 2018 and 2019, and I5: between 2019 and 2020), CD: critical difference, CV: coefficient of variance, H: heritability, GA: genetic advance, and GAM: genetic advance as percentage of mean. Note: and represent significant differences at 0.05 and 0.01, respectively; ns: nonsignificant difference.