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Performance of Epicotyl Grafting in Different Varieties of Mango

M. R. Islam
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

M. A. Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

The present experiment was conducted at the BAU Germplasm Centre (GPC) of Fruit Tree Improvement Project (FTIP), Bangladesh Agricultural University, Mymensingh during the period from August 2008 to January 2009 to investigate the performance of epicotyl grafting in different varieties of mango. The experiment consisted of (i) BAU released eleven varieties viz., BAU Aam-1, BAU Aam-2, BAU Aam-3, BAU Aam-4, BAU Aam-5, BAU Aam-6, BAU Aam-7, BAU Aam-8, BAU Aam-9, BAU Aam-10 and BAU Aam-11 and ii) three time of grafting operation viz. 6, 16 and 26 August. BAU Aam-6 took minimum time for first emergence, first flush and first leaf opening (9.67, 12.27 and 14.67 days respectively) and showed higher success and survivability (96.67% and 93.33% respectively). The maximum graft height, scion length, rootstock diameter, scion diameter, highest breadth of longest leaf, number of leaves per graft and canopy volume were recorded at BAU Aam-6 (52.69, 18.79, 18.05, 0.67, 0.61, 4.32 cm, 12.68 leaves and 0.0394 m3, respectively at 150 DAG). In respect of time of grafting operation, 6 August grafting gave the maximum success and survivability (84.54% and 78.18% respectively), minimum time required for first emergence, first flush and first leaf opening (10.12, 12.84 and 15.18 days respectively), maximum graft height, rootstock length, scion length, rootstock diameter, scion diameter, length and breadth of longest leaf, number of new leaves per graft and canopy volume (54.58, 17.65, 15.17, 0.64, 0.54, 20.05, and 4.01 cm, 10.40 leaves and 0.0338 m³, respectively at 150 DAG). The combined effects of varieties and time of grafting operation were statistically significant on all aforesaid parameters. The minimum time required for first emergence, first flush and first leaf opening (9.00, 11.00 and 14.00 days), higher percentage of success and survivability (both are 96.67%) were achieved in BAU Aam-6 in 6 August grafting. Maximum graft height, scion length, rootstock and scion diameter were achieved at 150 DAG in BAU Aam-6 (62.59, 20.23, 0.68 and 0.64 cm respectively) with 6 August grafting. The highest numbers of new leaves per graft and canopy volume were recorded at 150 DAG in BAU Aam-6 (13.60 leaves and 0.0543 m3 respectively) when grafting was done at 6 August. Therefore, the results suggest that grafting operation at 6 August with BAU Aam-6 is suitable for higher percentage of success, survivability and growth in mango.

Keywords: Epicotyl grafting, Varieties, Time of grafting, Mango

Location: BAU Germplasm Centre (GPC) of Fruit Tree Improvement Project (FTIP), Bangladesh Agricultural University, Mymensingh

Start Date: 00-08-2008

End Date: 00-01-2009

Program Area: Variety and Species

Commodity: Mango

Objectives:

1. To study the effect of varieties and time of epicotyl grafting on success and survivability in mango.

Methodology:

The experiment was conducted in the Litchi-Pineapple The experiment was carried out to study the effect of varieties and time of epicotyl grafting on the success and survivability of mango at the ‘Germplasm Centre’ (GPC) of Fruit Tree Improvement Project (FTIP), Bangladesh Agricultural University, Mymensingh during the period from August 2008 to January 2009. The experiment consisted of two factors: (A) Varieties and (B) Time of grafting. There were eleven varieties of mango released by BAU and three time of grafting treatments. Factor (A): i) V₁=Varieties BAU Aam-1 (Sraboni-1); ii) V₂=BAU Aam-2 (Seedless); iii) V₃= BAU Aam-3 (Diabetic); iv) V₄=BAU Aam-4 (Rad); v) V₅=BAU Aam-5 (Sarboni-2); vi) V₆=BAU Aam-6 (Polyembryoni-1); vii) V₇=BAU Aam-7 (Polyembryoni-2); viii) V₈=BAU Aam-8 (Polyembryoni-3); ix) V₉=BAU Aam-9 (Shoukhin-1); x) V₁₀=BAU Aam-10 (Shoukhin-2) and xi) V₁₁=BAU Aam-11 (Kanchamitha-1). Factor (B): Time of grafting i) T₁=6 August (1st time grafting); ii) T₂=16 August (2nd time grafting) and iii) T₃=26 August (3rd time grafting). The two factor experiment consisting of 33 treatment combinations was laid out in Randomized Complete Block Design (RCBD) with three replications. For each treatment combination grafting operations were performed on ten rootstocks of each plot of a block. Thus in total 990 grafts (33x3x10) were made. The treatment combinations were randomly assigned to each unit plot, so as to allot one treatment combination only in each block.

Source of Information: J. Agrofor. Environ. 4 (1): 45-50, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The grafting conducted at 6 August in BAU Aam-6 was found to have the highest survival rate (96.67%). On the contrary, the lowest survival rate (63.33%) was found at 26 August grafted plants. The results of the survivability envisaged that graft survivability was influenced by the cumulative effect of the factors employed in the experiment very much. Results of this experiment revealed that varieties and time of grafting significantly influenced on the success, days required to first emergence, first flush and aforesaid parameters. It may be inferred from the present study, that epicotyl grafting operation at 6 August was found suitable for highest success, survivability and plant growth for BAU Aam-6.

Knowledge Management: Journal