Abstract
Lycopersicon esculentum cv. Linia XXIV (L) and cv. Ostravske (O) was infected withAgrobacterium tumefaciens T37 (pTiT37). 37 L tumors and 33 O tumors were isolated. 13.5 % L tumors and 3.0 % O tumors regenerated shoots producing nopaline synthase. The shoots formed roots after transfer on R3B medium without phytohormones. From 10 primary shoots 35 plants cultivated in an unsterile soil were obtained by cutting. 6 selfpollinated plants did not produce any fruits. Fruits obtained through backcrossing had dramatically reduced seed numbers. The same is true of some other transformed plants with nearly normal pollen. Most transformed plants were susceptible to superinfection withA. tumefaciens T37 and B6-806. The incorporation of T-DNA into plant genome seems to cause not only male sterility, but also some kind of female sterility.
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