Abstract
Aims: The present study was undertaken to develop a protocol for in vitro regeneration and multiplication of disease-free quality planting material of Grapefruit (Citrus paradisi Macfad.). Study Design: Completely Randomized Design (CRD) Place and Duration of Study: The study was conducted at the Plant Tissue Culture Laboratory, Department of Horticulture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru, from 2020 to 21. Methodology: Nodal segments from the young shoots of field growing plants were used as explants to conduct the experiment. The explants were sterilized and placed on MS medium supplemented with different concentrations and combinations of growth regulators, namely BAP, Kinetin and Gibberellic acid. Results: Among the different combinations of growth regulators, the combination of BAP 1.0 mgL-1 and GA3 3.0 mgL-1 produced maximum number of shoots (7) from nodal segments Conclusion: The use of growth regulators such as BAP and GA3 is reliable for shoot regeneration even when the field explants are used.
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