Behnam Tahmasebpour, Omid Sofalian, Morteza Taghavi Sharabiani, Hasan Dehghanian
Due to the sensitivity of potatoes to viruses, the production of virus-free plants is critical for reducing production costs and enhancing yield. This study evaluates the effect of eleven combined hormonal and vitamin treatments on the main and secondary shoot lengths, as well as the number of secondary shoots in the Agria potato cultivar. Conducted in a completely randomized design with three replications from 2012 to 2014, the experiment revealed significant differences at a 1% probability level among the hormonal compounds regarding the traits evaluated. The combination treatment of P20T20B10PBA5 notably increased main shoot length and the number of secondary shoots. Conversely, treatments such as P5T5B5PBA2, P5T5B5PBA5, and P20T20B10PBA5 were associated with a decrease in the mean secondary shoot length. These findings underscore the importance of selecting appropriate hormonal combinations to optimize growth traits in potato tissue culture.