Genotype X Environment Interaction and Yield Stability in Early-Maturing Cowpea (Vigna unguiculata (L.) Walp.) Landraces in Ethiopia
Table 8
Stability parameters from Eberhart and Russell’s models for grain yield across environments.
Genotypes
Grain yield (kg ha−1)
Rank
bi
Rank
S2di
Rank
G1
2129.83
11
0.07 ns
1
189869.89
14
G2
2276.25
3
0.86 ns
8
127414.38
12
G3
2021.01
16
0.71 ns
7
488766.21
25
G4
2250.34
6
1.13 ns
15
68974.70
6
G5
2078.41
12
1.76
25
82960.98
8
G6
1883.44
19
1.73
24
90355.39
9
G7
2263.27
5
1.09 ns
13
277876.89
20
G8
1945.3
18
0.49 ns
6
265400.41
19
G9
2040.57
15
1.11 ns
14
238898.14
18
G10
2046.15
14
1.56
21
31101.69
3
G11
1535.02
25
0.40 ns
5
316877.15
21
G12
1630.21
24
0.36 ns
4
139355.98
13
G13
2053.39
13
1.48 ns
20
210571.37
15
G14
1647
23
0.25 ns
2
14619.98
2
G15
1824.91
21
1.58
23
81168.00
7
G16
2290.41
2
0.99 ns
11
219720.13
17
G17
1765.12
22
1.27 ns
18
114906.97
11
G18
1995.7
17
1.14 ns
17
416273.48
24
G19
1837.86
20
1.04 ns
12
327190.14
22
G20
2213.16
8
0.97 ns
10
61234.91
5
G21
2198.51
9
1.13 ns
16
−7463.38 ns
1
G22
2161.01
10
0.28 ns
3
97459.00
10
G23
2242.47
7
1.57
22
351289.98
23
G24
2632.42
1
0.91 ns
9
60010.33
4
G25 (ch)
2273.28
4
1.27 ns
19
215127.56
16
= significant at , = significant at , ns = nonsignificant, kg ha−1 = kilogram per hectare of pooled mean over six environments, bi and S2di, regression coefficient and deviation from the regression, respectively.
