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

Table 6

Biennial bearing and selection of promising lines at Gera.

Acc.	Rank (2YRS)	RP1	Rank (3YRS)	RP2	Rank (4YRS)	RP3	I
T50/11	16	2.24	23	32.08	1	52.24	0.30
T78/11	1	82.94	1	81.46	2	8.74	0.58
T80/11	11	5.34	14	40.88	3	29.27	0.25
T53/11	5	39	4	56.21	4	6.16	0.34
T39/11	46	39.56	8	76.17	5	19.5	0.45
T38/11	23	18.16	37	32.89	6	38.41	0.31
T70/11	12	58.65	10	72.93	7	17.38	0.50
T60/11	2	0.79	2	8.33	8	22.05	0.10
T43/11	6	21.92	15	36.56	9	6.94	0.22
T85/11	8	42.2	5	59.32	10	23.95	0.42
T67/11	83	8.21	7	80.39	11	38.82	0.42
T64/11	15	39.94	19	54.75	12	9.13	0.35
T51/11	9	13.12	3	49.38	13	34.78	0.32
T59/11	26	33.16	30	51.68	14	18.27	0.34
T41/11	52	72.44	28	84.52	15	6.42	0.54
<15 HY in%	60		66.7		100

Rank (2YRS): ranks of the top 15 genotypes using the mean of over two years (2017 and 2018), 3YRS: the mean of over three years (2017–2019), 4YRS: the mean of over three years (2017–2020), RP1-4: relative percentage of biennial bearing between consecutive years, Acc.: accessions, ≤15 HY in %: the top 15 high yielder in percentage, and I: biennial bearing intensity. Note: over the top 15 high yielders selected using the average mean of yield over four harvesting seasons. The bold values indicate the selection efficiency percentage using the top 15 high yielding promising lines.