•In mutation breeding, determination of LD50 is the main step to conduct breeding process.•Determination of LD50 for grape cv. ‘Red Globe’ and ‘Muscat’ would help to induce desired mutations by radiation treatment.•By choosing LD50 doses it avoids damage to planting material and gives higher multiplication and survival rates along with some useful mutations, which might be not possible by lower dosage.•Based on the survival percentage and growth rate of gamma rays treated cuttings, LD50 for ‘Red Globe’ and ‘Muscat’ was found to be 15-20 Gy and 15-25 Gy respectively.
Scientia Horticulturae – Elsevier
Published: Dec 19, 2017
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