Abstract
Abstract Genetic transformation was affected by material of explant, age of callus, and medium of regeneration. Two rice seed cultivars (Ilpum and Baekjinju) and mediums were investigated in this study for enhancing regeneration of transgenic rice expressed AtBI-1 gene encoding the Arabidopsis thaliana Bax inhibitor. Regeneration rate of Ilpum rice transformant in gelrite of 5 and 8 g were 27.4% and 18.0%, respectively. In Baekjinju, regeneration rate of transformant was 5.4% and 4.3% in 5 and 8 g gelrite, respectively. The highest number of transformant plant in this study was regenerated from Ilpum cultivar on MS medium (30.4%) and was applied for the subsequent experiment. The callus regeneration rate of transformant were 40.7% in callus infection of up-side, it was higher regeneration then in the down-side (3.9%). The regeneration rate of callus of 25 days and 35 days were 14.7% and 38.6%, respectively. The most important application of this work is in genetic transformation of rice, particularly for improvement transgenic plant tissue culture protocol with high frequency of plant regeneration.Keywords Agrobacterium -mediated, Transformation, Rice, Regeneration, AtBI-1
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