In vitro rooting protocol for clonal rootstocks of apple (Malus × domestica Borkh.)

Authors

  • I Manzoor SKUAST-Kashmir , Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir image/svg+xml Author
  • A Kumar SKUAST-Kashmir , Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir image/svg+xml Author
  • A S Sundouri SKUAST-Kashmir , Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir image/svg+xml Author
  • B Dhekale SKUAST-Kashmir , Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir image/svg+xml Author
  • Neelofar SKUAST-Kashmir , Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir image/svg+xml Author

DOI:

https://doi.org/10.24154/jhs.v21i1.4335

Keywords:

Apple, clonal rootstocks, in-vitro, rooting

Abstract

Geneva (G.) apple clonal rootstocks are a novel series known for their super-dwarfing nature, cold hardiness, disease and insect-pest resistance, and resilience to replant disease. This study evaluated the in vitro rooting performance of two specific clonal rootstocks i.e. G.41 and G.214, using 1.5 cm shoot cultures. The microshoots were cultured on full- and half-strength Murashige and Skoog (MS) media, as well as Woody Plant Medium (WPM), each supplemented with varying concentrations (1.0–5.0 mg/L) of either NAA or IBA. Among the treatments, half-strength MS medium supplemented with 5.0 mg/L IBA induced the fastest response in the G.41 rootstock, resulting in root initiation at 6.54 days and root emergence at 10.63 days, outperforming G.214. Furthermore, G.41 achieved a perfect 100% rooting rate when grown on half-strength MS medium combined with IBA at 1.0, 3.0, or 5.0 mg/L. The interaction of G.41 with half-strength MS medium containing 5.0 mg/L IBA also yielded the highest number of roots per shoot (17.00), the maximum average root length (82.70 mm), and the longest individual root length (146.13 mm). Ultimately, this optimized protocol offers an efficient, year-round micropropagation strategy to rapidly produce true-to-type, virus-free, and elite clonal apple rootstocks.

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Author Biographies

  • I Manzoor, SKUAST-Kashmir, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

    Professor in Division of Fruit Science

  • A Kumar, SKUAST-Kashmir, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

    Ph.D Scholar in Division of Fruit Science

  • A S Sundouri, SKUAST-Kashmir, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

    Professor in Division of Fruit Science

  • B Dhekale, SKUAST-Kashmir, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

    Assistant Professor, Division of Agricultural Statistics

  • Neelofar, SKUAST-Kashmir, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

    Professor, Division of Floriculture and Landscaping

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Published

30-06-2026

Data Availability Statement

None 

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Section

Research Papers

How to Cite

Manzoor, I., Kumar, A., Sundouri, A. S., Dhekale, B., & Neelofar. (2026). In vitro rooting protocol for clonal rootstocks of apple (Malus × domestica Borkh.). Journal of Horticultural Sciences, 21(1). https://doi.org/10.24154/jhs.v21i1.4335