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Jackfruit (Artocarpus heterophyllus Lam.) seeds are recalcitrant in nature. Hence, loss of seed viability in short period during storage imposes a problem in seed germination. Softwood grafting method is standardized for rapid multiplication. However, due to recalcitrant nature the availability of rootstock for grafting throughout the year is the main constraint. Hence, an experiment was undertaken during the year 2017-18 to study the critical moisture loss percentage for viability of jackfruit seeds under ambient storage condition at College of Horticulture, Mulde Tal. Kudal, Dist. Sindhudurg. Hundred seeds per treatment were stored under ambient storage condition for 15, 30, 60, 90, 120 and 150 days. In the present study, maximum germination percentage (53.25 %) was recorded with minimum water loss (18.51 %) when jackfruit seeds stored at 15 days storage period. The linear regression equation Ŷ moisture loss = 43.68 0.49X with R2 value of 0.97 explained the rate at which the germination percentage was lowered against per cent loss of water. The study revealed that the 43.68 per cent moisture loss was critical moisture level beyond which germination could not occur.

Critical moisture level for seed viability in jackfruit (Artocarpus heterophyllus Lam.)