STUDIES ON INDUCTION OF PARTHENOCARPY THROUGH INTERGENERIC POLLEN AND GROWTH REGULATORS IN WATERMELON (Citrullus lanatus Thunb.)
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Date
2017-07-11
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COLLEGE OF HORTICULTURE, VENKATARAMANNAGUDEM, WEST GODAVARI – 534 101 Dr. Y. S. R. HORTICULTURAL UNIVERSITY
Abstract
The present study entitled “Studies on induction of parthenocarpy
through intergeneric pollen and growth regulators in watermelon
(Citrullus lanatus Thunb.)” was carried out during 2016-2017 at College
of Horticulture, Dr. Y. S. R. Horticultural University,
Venkataramannagudem, West Godavari District, A. P.
A set of two experiments were conducted in randomized block
design with eight treatments and three replications. In the first experiment
of intergeneric pollen studies, female flowers of watermelon were
pollinated with bottle gourd pollen, bitter gourd pollen, pointed gourd
pollen, ash gourd pollen, bottle gourd + bitter gourd pollen, bottle gourd +
ash gourd pollen, bottle gourd + pointed gourd pollen and control
(watermelon pollen). In the second experiment, the growth regulator
treatments consisting of auxins (2, 4-D and NAA) and cytokinin (CPPU)
were given at different concentrations viz., 2, 4-D @ 25 ppm, 2, 4-D @ 50
ppm, NAA @ 100 ppm, NAA @ 150 ppm, CPPU @ 50 ppm, CPPU @
100 ppm and CPPU @ 200 ppm respectively along with control. The data
Submitted
on morphological, quantitative and qualitative characters were recorded
and statistically analyzed.
Significant differences were observed among the intergeneric pollen
and different growth regulator sprays at varying concentrations on
quantitative and qualitative characters.
Among the intergenric pollen studies, bottle gourd pollen has
induced parthenocarpy, but the fruit flesh is slightly filled with papery
seeds. However, empty / papery seed count was highest when mixed pollen
of bottle gourd + pointed gourd (60.50) was used and lowest was recorded
with ash gourd pollen (37.20). The minimum seed weight was observed
with bottle gourd pollen (1.60 g) whereas, maximum seed weight was
recorded with control (17.99 g). Among the intergeneric pollen used, the
maximum fruit set percentage (49.26 %), number of fruits per plant (1.56),
average fruit weight (1.74 kg), fruit diameter (438.53 mm), and yield per
plant (4.75 kg) were observed when female flowers of watermelon were
pollinated with bottle gourd pollen whereas, less rind thickness (1.12 cm)
was observed with bottle gourd + bitter gourd pollen. The qualitative
characters like TSS (10.75 0Brix) and total sugars (11.91 %) were highest
when flowers were pollinated with bitter gourd pollen.
In the second experiment, applications of CPPU @ 200 ppm and
NAA @ 150 ppm were significantly induced pathenocarpy in watermelon.
The highest number of empty seeds (91.83) with lowest seed weight (1.44
g) was registered with the application of CPPU @ 200 ppm. Minimum
number of empty seeds or papery seeds were recorded with the application
of 2, 4-D @ 25 ppm but the highest seed weight was reported from control
(17.75 g). The quantitative characters like percent fruit set (78.55 %),
number of fruits per plant (3.27), fruit diameter (474.10 mm), yield per
plant (5.91 kg) and less rind thickness (1.14 cm) were highest with the
application of CPPU @ 200 ppm whereas, maximum fruit weight (1.88 kg)
was observed with the application of NAA @ 150 ppm. The qualitative
characters like highest TSS (12.12 0Brix) and total sugars (15.54 %) were
recorded with the application of CPPU @ 200 ppm.
From these two experiments, it was revealed that bottle gourd pollen
and CPPU @ 200 ppm was successfully induced parthenocarpy in
Description
A set of two experiments were conducted in randomized block
design with eight treatments and three replications. In the first experiment
of intergeneric pollen studies, female flowers of watermelon were
pollinated with bottle gourd pollen, bitter gourd pollen, pointed gourd
pollen, ash gourd pollen, bottle gourd + bitter gourd pollen, bottle gourd +
ash gourd pollen, bottle gourd + pointed gourd pollen and control
(watermelon pollen). In the second experiment, the growth regulator
treatments consisting of auxins (2, 4-D and NAA) and cytokinin (CPPU)
were given at different concentrations viz., 2, 4-D @ 25 ppm, 2, 4-D @ 50
ppm, NAA @ 100 ppm, NAA @ 150 ppm, CPPU @ 50 ppm, CPPU @
100 ppm and CPPU @ 200 ppm respectively along with control. The data
Submitted
on morphological, quantitative and qualitative characters were recorded
and statistically analyzed
Keywords
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Citation
College of Horticulture, Dr. Y. S. R. Horticultural University, Venkataramannagudem, West Godavari District, A. P.