Abstract
Abstract Three North American potato (Solanum tuberosum L.) cultivars were characterized for callus initiation, shoot regeneration, and efficiency of micropropagation. Primary callus from leaf explants of ‘Viking’ and ‘Norgold-“M”’ formed stolon-like structures; ‘Red LaSoda’ formed both roots and stolon-like structures. After three transfers, 30% of ‘Red LaSoda’ calli eventually regenerated one to three shoots per callus. Micropropagation rates were 5.1, 3.7, and 3.8 shoots per axillary bud of ‘Red LaSoda’, ‘Norgold-“M”’, and ‘Viking’, respectively. No differences in mean number of shoots resulted from different growth conditions for ‘Norgold-“M”’ and ‘Viking’. ‘Red LaSoda’ produced significantly more shoots than ‘Viking’ or ‘Norgold-“M”’- Chemical names used: 2,4-dichlorophenoxyacetic acid (2,4-D); 1-naphthaleneacetic acid (NAA); 6-benzylamino-purine (BA); gibberellic acid (Ga3).
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