Maintenance of gynoecious line of cucumber and its quality seed production in polyhouse condition
Loading...
Date
2013
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
MPUAT, Udaipur
Abstract
The present experiment entitled “Maintenance of gynoecious line of cucumber
and its quality seed production in polyhouse condition” was conducted during July,
2012 under naturally ventilated polyhouse (NPV) condition at Protected Cultivation
Unit of the College of Horticulture and Forestry, Jhalawar. The experiment consist of
two chemicals (silver nitrate and STS), their two doses (2 & 4mM of STS and 200 &
400 ppm of silver nitrate) and two times of application (once and twice), thus forming
eight treatments, were applied in soil and as foliar applications on gynoecious
cucumber cv. ‘Infinity’ and ‘Hilton’ grown in RBD with three replications for
identification of suitable chemical and their dose for induction of staminate flower.
Flowers were further pollinated at 6, 7, 8 and 9am and harvested at 35, 45 and 55 days
after anthesis for standardization of pollination time and stage of fruit harvesting for
seed quality and yield.
Among the two chemical, silver thiosulphate (STS) performed better over silver
nitrate in both the cultivar. Further, the response of different treatments on cultivars
was better in foliar application than soil application. Twice application of the same
treatment performed better over their once application, irrespective of methods of
application and cultivars used. Among the treatments, application of STS @ 2mM
twice followed by silver nitrate @ 400 ppm twice was found better for induction of
staminate flower on total number of plants, days to anthesis of first staminate flower,
node number up to which staminate flower appeared, total number nodes induced
staminate flower, number of staminate flower and pollens per flower. Higher doses of
silver nitrate showed toxicity effect in the leaves, however, it was recovered within
few days. All the treatments produced staminate flower in all the plants.
Further among four pollination times (6, 7, 8 and 9 am), delayed pollination
(9am) gave better result as it had maximum percentage of fruit setting (96.97 and
90.25%), maximum percentage of fruit developed to physiological maturity (96.19%
and 89.06%), maximum number of filled seeds (270.56 and 217.44), minimum
number of unfilled seeds (41 and 41.89) in both the cultivars, maximum number of
seeds per fruit (303.55 and 279.52), seed yield (6.07 and 6.05g) and 50-seed in weight
in both the cultivars
Fruit harvested at 55 days after anthesis (DAA) followed by 45 and 35 DAA
significantly influenced the fruit length, fruit weight, number of seeds per fruit,
number of filled seeds, number of unfilled seeds, seed yield and 50-seed weight in
both the cultivars. The maximum fruit width (6.55 and 6.54 cm), fruit length (23.25
and 21.19 cm), fruit weight (282.56 and 238.55g), number of seeds/fruit (321.32 and
280.22), number of filled seeds (300.88 and 257.44), seed yield/fruit (6.78 and 6.56g),
50-seed weight (1.57 and 1.53 g) and seed length (11.25 mm and 10.34 mm) and
minimum number of unfilled seeds (24.70 and 24.22) and moisture content (17.24 %
and 18.17 % ) at 55 DAA was recorded in both the cultivars, respectively. The
germination percentage and pollen viability (97.75% in ‘Infinity’ and 96.67% in
‘Hilton’) was maximum at 45 DAA.
Description
Maintenance of gynoecious line of cucumber and its quality seed production in polyhouse condition
Keywords
null
Citation
Nagar and Maurya, 2013