Genotypic variation in pollen tube growth, esterase activity
and ovule development and fertilization during a cold (day/night temperature
15-20/< 8° C) spell in the field during
1990/91 season at Hisar.
| Line/
Cultivar |
Pollen tube growth | Esterase
activity scorec |
Ovule development
indices (%)d |
Fertilization
of ovules (%) |
||
| in vitroa
(µm) |
in vivob
(%) |
|||||
|
|
|
|||||
| ICCV 88501 | 255±8.9e | 62(16/26) | 4.0±0.14e |
101
|
88
|
59±2.2e |
| ICCV 88502 | 236±8.3 | 78(18/23) | 3.2±0.22 |
100
|
85
|
56±2.7 |
| ICCV 88503 | 273±9.2 | 84(21/25) | 3.8±0.17 |
102
|
91
|
64±1.9 |
| ICCV 88504 | 125±4.1 | 46(11/24) | 3.1±0.23 |
100
|
75
|
37±1.4 |
| ICCV 88505 | 181±5.9 | 54(13/24) | 3.4±0.19 |
102
|
71
|
33±1.2 |
| ICCV 88506 | 236±7.7 | 74(17/23) | 3.8±0.17 |
102
|
94
|
49±2.1 |
| ICCV 88508 | 127±4.4 | 69(18/26) | 3.2±0.22 |
104
|
72
|
35±1.7 |
| ICCV 88509 | 209±8.5 | 75(18/24) | 3.9±0.21 |
99
|
90
|
49±2.3 |
| ICCV 88510 | 128±4.7 | 36( 9/25) | 3.0±0.19 |
102
|
75
|
43±2.4 |
| ICCV 88511 | 144±5.3 | 46(11/24) | 3.4±0.17 |
103
|
91
|
33±1.7 |
| ICCV 88512 | 165±6.3 | 58(15/26) | 3.1±0.22 |
98
|
85
|
40±2.0 |
| ICCV 88513 | 202±9.7 | 63(15/24) | 3.2±0.18 |
102
|
83
|
31±1.7 |
| ICCV 88514 | 182±8.2 | 42(10/24) | 2.9±0.23 |
105
|
77
|
35±1.3 |
| ICCV 88515 | 148±6.3 | 30( 7/23) | 3.1±0.19 |
98
|
80
|
35±1.7 |
| Pant G 114 | 148±8.1 | 38(10/26) | 2.8±0.23 |
101
|
69
|
23±1.1 |
| Pant G 115 | 206±8.7 | 37(10/27) | 3.4±0.21 |
103
|
79
|
30±1.4 |
| Gaurav | 201±8.6 | 48(13/27) | 3.1±0.22 |
99
|
81
|
28±1.1 |
| G 130 | 119±5.2 | 37(10/27) | 2.8±0.18 |
101
|
72
|
24±1.8 |
| K 1189 | 245±9.6 | 76(19/25) | 3.2±0.19 |
102
|
79
|
45±2.1 |
| Chafa | 120±5.4 | 22( 6/27) | 1.6±0.15 |
96
|
64
|
19±1.4 |
| Annigeri | 123±5.1 | 24( 6/25) | 1.8±0.21 |
97
|
56
|
18±1.1 |
aPollen tube growth was measured after 2 h culture in Brewbaker
and Kwack's medium at room temperature.
bPercentage of flowers with at least 10 pollen tubes at
the base of styles 1 day after flower opening. Figures in parentheses:
(flowers with >10 pollen tubes at the base of the style/total flowers tested)
cEsterase activity on stigma was scored on a 1-5 scale (1,
low and 5, high) one day before flower opening.
dOvule development (number and size) in flowers which opened
on days when temperatures during each of the preceding three nights fell
below 5° C for at least 6 h expressed as
% of that in flowers which opened on days when minimum temperatures were
above 12° C.
eSEM, Cultivar/lines means were significantly different
according to the Kruskal-Wallis test.