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Effect of Gibberellic Acid on Seedlessness of Latkan (baccaurea Sapida) (2018-2019)

A. S. M. Mesbah Uddin
Fruit Research Farm of Horticulture Research Centre, BARI Gazipur

M. T. Islam
Fruit Research Farm of Horticulture Research Centre, BARI Gazipur

B. C. Sarkar
Fruit Research Farm of Horticulture Research Centre, BARI Gazipur

Abstract/ Executive Summary:

An investigation was carried out at the Fruit Research Farm of Horticulture Research Centre, Gazipur during February 2019 to July 2019. The investigation was done to know the effect of GA₃ on seedlessness of latkan. Three times were used for applying GA₃, first was before bud breaking then before bloom and the last was at fruit setting stage. Sub treatments were varying with six concentrations of gibberellic acid i,e T_{1 :} 0 ppm (control), T₂ : 50 ppm, T₃ : 100 ppm, T₄ : 150 ppm, T₅ : 200 ppm and T₆ : 250 ppm. Harvested fruit shape was roundish, skin colour of fruits was yellowish and surface texture of fruits was smooth. Pulp and albedo colour was off-white and the texture of pulp was observed soft. A wide range of variation was observed with respect to fruit weight, fruit breadth, inflorescence length and number of fruits per inflorescence among the treatments. The highest individual weight of fruit was recorded from T₆ (14.50g), whereas the lowest individual fruit weight was noted in T₁ (12.67g).The largest fruit was observed in T₆ (3.10 x3.10 cm) and the smallest fruit was recorded in T₁(2.8 x 3.0cm).Inflorescence length varied from 19.67 cm to 26.63 cm, the highest was found in T₆ (26.63cm) followed by T₅ (25.17cm) and minimum inflorescence length was recorded in T₁ (19.67cm). Number of fruits significantly varied among the treatments. Maximum fruits was observed in T₆ (21.83) and the least number of fruit was recorded in T₁ (14.83). Rind weight varied from 5.80g to 6.07g in T₁ and T_6, respectively. The highest rind thickness was recorded in T₅and T₆ (0.32cm) and the lowest thickness was noted in T₂andT₂ (0.30 cm). In case of number of segments per fruit, maximum segments were manifested in T₅ (3.60) and minimum number of segments was recorded in T₄ (3.07).Percent edible portion was obtained highest in T₆ (44.18) and lowest was obtained from T₁(40.81).Number of seeds varied from 3.07in T₁ to 3.60 in T₅. The largest seed was observed in T₁ (1.23x 0.94 cm) and the smallest seed was noticed in T₆ (1.08 x0.88cm). Weight of 100 seeds was foundmaximum in T₂ (26.0g) and minimum value was recorded in T₅ (22.50g). TSS varied from 15.80 inT₄and T₆to 16.27 in T₁.

Keywords: Latkan, Fruit, Seedlessness of latkan, Fruit weight, Fruit length, Fruit breadth, Rind weight, Pulp weight, Seed weight, Seed length, Seed breadth

Location: Fruit Research Farm of Horticulture Research Centre, BARI Gazipur, Bangladesh

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Latkan

Objectives:

To know the effect of GA₃ on seedlessness of latkan.

Methodology:

The experiment was carried out at the Fruit Research Farm of Horticulture Research Centre, BARI Gazipur during 2018-2019. One ten years old asexually propagated Burmese grape tree with was used. Main treatment was time of application of gibberellic acid. Three times were used, first was before bud breaking then before bloom and the last was fruit setting stage. Sub treatments were varying with six concentrations of gibberellic acid i,e T_{1 :} 0 ppm (control), T₂ : 50 ppm, T₃ : 100 ppm, T₄ : 150 ppm, T₅ : 200 ppm and T₆ : 250 ppm. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. A single branch of the tree was used as one replication. Cultural practices like pruning, fertilization and weeding and application of pesticide and fungicide were used in proper time during the duration the research period. Data on different parameters of Burmese grape fruit i.e. individual fruit weight, fruit length, fruit breadth, number of fruit/panicle, rind weight, pulp weight, no. of segment/fruit,edible portion,TSS, 100 seed weight, seed length and seed breadth were recorded and analyzed statistically.

Source of Information: Annual Research Report 2018-2019, Fruit Research Farm of HRC, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

According to the objective no expected output was obtained. It might be due to heavy rainfall after applying hormone (GA₃). GA₃ 250 ppm gave the bigger fruits with higher edible portion. The experiment will be continued for final conclusion.

Knowledge Management: Report/Proceedings