Abstract
The seeds or seedlings are the main key to the success of potato cultivation. So one way to obtain high quality of potato seeds is to do with in vitro plant propagation or tissue culture. The research was conducted at Tissue Culture Laboratory, UPT Seed Horticulture Johor Building Medan, used the completely randomized design with two factors. The first factor was potato cultivar (K1: Granola Kembang, and K2: Repita), and the second factor was paclobutrazol M1 (MS + 0 ppm Paclobutrazol), and M2 (MS + 10 ppm Paclobutrazol). The results showed that the concentration of paclobutrazol significantly affected on the plant height, the number of shoots, the number of micro tuber, the micro tuber diameter, and the fresh weight of micro tuber.
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