EFFECT OF ROOTSTOCKS AGE ON SOFTWOOD GRAFTING IN JACKFRUIT (Artocarpus heterophyllus Lam.)

H.L. PRIYANKA¹, G.M. VINAY²*, KULAPATI HIPPARAGI³, NAYAN DEEPAK G.⁴, N.P. MAMATHA^5
1Department of Fruit Science, College of Horticulture, University of Horticultural Sciences, GKVK Post, Bengaluru, 560 065, Karnataka
²Department of Fruit Science, College of Horticulture, University of Horticultural Sciences, GKVK Post, Bengaluru, 560 065, Karnataka
³Department of Fruit Science, College of Horticulture, Bagalkotm University of Horticultural Sciences, Bagalkot, 587104, Karnataka
⁴Division of Fruit Crops, ICAR - Indian Agricultural Research Institute, Pusa, New Delhi, Delhi 110012
⁵Department of Fruit Science, College of Horticulture, Arabhavi, University of Horticultural Sciences, Bagalkot, 587104, Karnataka, India
* Corresponding Author : vingeegmvegs@gmail.com

Received : 10-02-2017     Accepted : 03-03-2017     Published : 12-03-2017
Volume : 9     Issue : 12       Pages : 4043 - 4044
Int J Agr Sci 9.12 (2017):4043-4044

Keywords : Jackfruit, Heterozygous, Age of rootstock, Scion, Softwood grafting
Conflict of Interest : None declared
Acknowledgements/Funding : I thank Dr. Kulapati Hipparagi for support in conducting the research. I acknowledge my sincere thanks to Nayan Deepak G and Vinay G M for providing some valuable advice on writing the manuscript
Author Contribution : None declared

Jack is heterozygous in nature and has long juvenile phase, true to the types can be obtained through grafting. This experiment was carried out to find out the optimum age of rootstock for carrying out softwood grafting in jack. The grafting operation was carried out at monthly intervals on two months to seven months old rootstocks. Precured scion sticks were used for grafting purpose in this experiment, seven months old rootstock recorded the maximum graft success (72.39%) when compared to all the other ages of rootstocks under study. There was no sprouting observed in case of six months old rootstock and the least success (23.60%) was in five months old rootstock. The number of days taken for bud sprouting was minimum (21.50) in case of seven months old rootstock and the maximum number of days was recorded in four months old rootstock (23.32) and five months old rootstock (23.52).Seven months old rootstock recorded the maximum number of leaves (5.60), number of buds (3.49), length (19.50cm) and girth of shoot (0.86cm), whereas the number of branches was highest (1.91) in four months old rootstock. The mortality of grafts was minimum (25.65%) in seven months old rootstock, while it was highest in case of six months old rootstock.

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