Performance of microtuber derived from in vitro plantlets of potato varieties on sprout attributes in relation to its weight

The present work was conducted to evaluate the varietal performance of three potato varieties namely- Asterix, Granola and Diamant with different microtubers weights of >500 mg, 250-500 mg and <250 mg on sprout characters. The variety Granola showed longer dormancy period (30.33 days) in the case of less weight microtuber and it was decreasing the rate with increasing of microtuber weight in all varieties. The variety Diamant produced slightly more sprout per microtuber for all weights while the variety Asterix showed higher number of sprout per microtuber by >500 mg. Asterix had significantly longer sprouts (28.43 mm) than other two varieties and the trend of the length of sprout was decreased with the decrease of microtuber weight. The larger microtubers (>500 mg) of the variety Diamant and Asterix tended to have higher values on fresh weight of sprouts and sprout mass per unit of sprout length than Granola variety.