Genotype X Environment Interaction and Yield Stability in Early-Maturing Cowpea (Vigna unguiculata (L.) Walp.) Landraces in Ethiopia

Table 9

Stability analysis using Wricke’s ecovalence (Wi) and cultivar superiority measure (Pi) of the Lin and Binns model.

Genotypes	Grain yield (kg ha^-1)	Rank	Wi	Rank	Pi	Rank
G1	2130	11	1653466	22	439506	13
G2	2276	3	621011	8	255473	2
G3	2021	16	2110548	25	664236	19
G4	2250	6	384425	5	280255	3
G5	2078	12	827808	10	435876	12
G6	1883	19	827812	11	650874	18
G7	2263	5	1215161	18	320461	8
G8	1945	18	1337327	19	627385	17
G9	2041	15	1061949	15	528960	15
G10	2046	14	221842	2	415887	11
G11	1535	25	1617493	21	1126704	25
G12	1630	24	940800	13	887791	24
G13	2053	13	1097987	16	474959	14
G14	1647	23	545296	6	850599	23
G15	1825	21	656522	9	709147	22
G16	2290	2	1197791	17	296859	5
G17	1765	22	605750	7	702671	21
G18	1996	17	1776428	24	586899	16
G19	1838	20	1407161	20	697557	20
G20	2213	8	342873	3	301445	6
G21	2199	9	79422	1	290328	4
G22	2161	10	849857	12	360932	9
G23	2242	7	1729884	23	410594	10
G24	2632	1	343227	4	63329	1
G25	2273	4	1008432	14	306404	7