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DIIVERGENCE OF Ri T-DNA TRANSFORMATS OF CABBAGE

He Yu-ke (Dept. of Hort. Northwestern Agricultural University, Yangling, Shaanxi 712100)  
Hypocotyl segments of cabbage seedlings were cocultured with Agrobacterium rhizogenes in vitro, giving rise to 133 hairy root lines. After that,transformed plants were regenerated directly on the segments of transformed roots. All transformats got from one root line are identical in pattern of root growth, plant regeneration potential and phenotype of regenerated plants, whereas the transformats got from different root lines are very different in these aspects. The main reason for the divergence of Ri T-DNA transformats is the heterogeneity of transfromed genes in transformats.
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