Response of Sorghum to Cold Stress at Early Developmental Stage
Table 6
Mean squares from analysis of variance for cold tolerance traits under soil-based conditions (cold and normal temperatures) and the filter paper assay.
Soil-based assay (cold temperature)
Source of variation
d.f.
Emergence (arcsin)
Emergence index (days)
Vigor (1–9)
Shoot lengtd (cm)
Shoot dry weight (mg)
Primary root lengtd (cm)
Root dry weight (mg)
Rep
3
47.65
11.43
0.23
1.75
0.60
0.05
0.30
Genotype
39
720.48
24.50
7.43
15.31
19.80
13.67
6.93
Error
117
22.86
4.91
0.19
0.36
0.50
0.56
0.17
C.V. (%)
—
10.08
12.71
8.35
9.87
10.43
12.43
12.64
s.e.d.
—
3.38
1.57
0.31
0.42
0.49
0.53
0.29
Soil-based assay (normal temperature)
Source of variation
d.f.
Emergence (arcsin)
Seedling lengtd (cm)
Shoot dry weight (mg)
Primary root lengtd (cm)
Root dry weight (mg)
—
—
Rep
2
330.56
12.33
4.75
2.87
1.21
—
—
Genotype
39
105.39
27.64
14.04
24.64
12.01
—
—
Error
78
42.34
3.50
3.80
2.32
1.93
—
—
C.V. (%)
—
9.50
9.78
7.93
6.41
7.41
—
—
s.e.d.
—
5.31
1.53
1.59
1.25
1.39
—
—
Filter paper assay
Source of variation
d.f.
Germination % (optimum)
Germination % (cold)
—
—
—
—
—
Rep
1
5.89
11.12
—
—
—
—
—
Genotype
39
58.17
142.25
—
—
—
—
—
Error
39
15.9
19.28
—
—
—
—
—
C.V. (%)
—
5.44
8.55
—
—
—
—
—
s.e.d.
—
3.99
4.39
—
—
—
—
—
ns, nonsignificant. A significant mean square value at p-value <0.1%.
