Heterosis studies in diallel crosses of maize for yield and yield attributing traits in maize ( Zea mays L.) over locations
Table 1. Pooled analysis of variance for combining ability (Diallel) for yield and yield components in maize
Days to 50%
Days to 50%
Days to
Plant height
Ear height Ear girth
Source of variation
d.f.
tasseling
silking
maturity
(cm)
(cm)
(cm)
Replicates
2.00
15.07**
6.93
2.14
395.83*
281.03**
1.74
Environments
2.00
867.30**
497.84**
369.02**
2388.83**
461.55**
12.24**
Replication x Environments
4.00
10.56**
0.41
2.83
18.17
8.07
0.18
Treatemnts
54.00
151.17**
147.58**
229.90**
8089.02**
3151.65**
17.69**
Parents
9.00
269.86**
244.04**
227.62**
4804.52**
2189.77**
16.27**
Hybrids
44.00
125.91**
124.96**
159.88**
5828.76**
2796.36**
10.21**
Parents vs.Hybrids
1.00
194.37**
274.88**
3331.17**
137101.13** 27441.09** 359.74**
Treatment x Environments
108.00
3.21
2.31
3.33
43.89
18.06
2.35**
Parent x Environments
18.00
3.38
0.8
1.21
31.74
25.67
3.10**
Hybrids x Environments
88.00
3.21
2.43
3.81
47.06
16.9
2.25**
Parent vs.Hybrids x Env.
2.00
1.57
10.57
0.99
13.96
0.84
0.14
Error
324.00
3.16
3.79
5.03
102.43
26.08
0.5
Total
494.00
22.94
21.17
30.7
972.06
368.8
2.83
Table 1 (cont.)
Ear length Number of kernel
Number of
100- Seed
Grain yield
Source of variation
d.f.
(cm)
rows per ear
kernels per row
weight (g)
per plant (g)
Replicates
2.00
3.06
4.76
19.62
4.67
112.78
Environments
2.00
22.96**
15.62**
237.07**
440.40**
40696.17**
Replication x Environments
4.00
3.91
0.80
4.09
0.93
27.14
Treatemnts
54.00
50.34**
8.57**
299.28**
111.46**
8556.84**
Parents
9.00
62.83**
5.80**
331.09**
115.18**
1961.60**
Hybrids
44.00
28.34**
7.83**
162.26**
83.43**
5804.86**
Parents vs.Hybrids
1.00
905.93**
66.32**
6041.57**
1311.67**
189001.41**
Treatment x Environments
108.00
6.43**
4.82**
50.57**
48.61**
1404.17**
Parent x Environments
18.00
4.39**
4.27**
20.43**
44.57**
1211.23**
Hybrids x Environments
88.00
6.49**
5.00**
56.60**
50.48**
1318.73**
Parent vs.Hybrids x Env.
2.00
22.24**
1.63
56.31**
2.66**
6899.94**
Error
324.00
0.73
0.63
3.59
0.55
36.19
Total
494.00
7.52
2.49
47.22
24.99
1431.62
* Significant at 5% level; ** Significant at 1% level
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