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Effects of Methods of Grafting and Age of Rootstock on Propagation of Off-season Germplasms of Jackfruit

M. A. Mannan*
Agrotechnology Discipline, Khulna University, Khulna 9208, Bangladesh

M. M. Islam
Agrotechnology Discipline, Khulna University, Khulna 9208, Bangladesh

S. A. K. U. Khan
Agrotechnology Discipline, Khulna University, Khulna 9208, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to the effect of methods of grafting and age of rootstock in off-season jackfruit propagation. Higher success of grafting was observed in cleft grafting with 7, 10 and 14-day old rootstock (89.24, 89.24 and 63.58%, respectively) and that was lower in splice grafting with 118, 22, 26 and 30- day old rootstock (0.91%). The higher values of success (84.99%) was found with 7 day-old rootstock and the highest time was required to bud break (35 days), to the emergence of the first leaf (38.78 days), and to first flush (42.83 days) in 14 -day old rootstock, whereas the highest percentage of survivability (99.98%) was recorded in 7 and 14- day old rootstocks in cleft grafting. The taller plant was obtained in cleft grafting with 7-day, 10-day and 14-day old rootstock (25.50, 23.78 and 23.00 cm, respectively) 180 days after grafting (DAG). Almost similar growth of scion was observed with 7-day, 10-day and 14-day old rootstocks (5.67, 5.59 and 5.62 cm, respectively) 180 DAG. The number of leaves, length of leaves and breadth of leaves were also higher in cleft grafting with 7-day, 10-day and 14-day old rootstocks.

Keywords: Grafting, Rootstock age, Propagation, Jackfruit

Location: Horticulture Centre, Department of Agricultural Extension, Daulatpur, Khulna

Start Date: 00-05-2004

End Date: 00-12-2004

Program Area: Resource Development and Management

Commodity: Grafting, Germplasm

Objectives:

Attempts have been taken to investigate the effect of methods of grafting and ages of rootstock on the propagation of off-season jackfruit to determine the appropriate age of rootstock for grafting of off-season jackfruit and to identify the suitable and easy method of grafting for off-season germplasm of jackfruit.

Methodology:

The study was conducted at Horticulture Centre, Department of Agricultural Extension, Daulatpur, Khulna, during May to December 2004. All possible combinations of two methods of grafting (viz. Cleft and splice) and eight ages of rootstock (viz., 3, 7, 10, 14, 18, 22, 26 and 30 days) were considered as treatments. A twofactor experiment was laid out in Randomized Complete Block Design (CRBD) with three replications.

Data were collected at an interval of 30 days starting from 90 days of bud break until 180 days. Data were recorded on a number of successful grafts, days to bud break, days to emergence of the first leaf, days to first flush, percentage of survivability, growth of scion (length and diameter in centimeter), growth of the plant (cm), number of leaves, length of leaves (cm) and breadth of leaves (cm).

The collected data were statistically analyzed to find out the significance of differences between the treatments and treatment combinations. The means of all the treatments were calculated and the analysis of variances (ANOVA) for all the characters was performed by F-test. The significant differences in the means of treatments were compared by Duncans New Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: Khulna University Studies, 7(2): 77-82, 2006

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study, it was observed that the methods of grafting and age of rootstock had significant effect on the percentage of success, percentage of survivability, growth and development of the grafts. Grafting operation done by cleft method with 7-, 10- and 14-day old rootstocks were the better combinations for the propagation of off-season germplasm of jackfruit.

Knowledge Management: Journal