title: Assessment of the efficiency of cotransformation of the T-DNA of disarmed binary vectors derived from Agrobacterium tumefaciens and the T-DNA of A. rhizogenes.
abstract: Co-transfer of Agrobacterium rhizogenes T-DNA and T-DNA from the A. tumefaciens binary vector pBin19 (Bevan, 1984) was studied in detail using Nicotiana rustica. High frequencies of co-transfer of T-DNA's were observed, even when no selection pressure was exerted. Increased levels of pBin19 T-DNA were found in hairy root cultures with selection at higher levels of kanamycin sulphate (50-200 μg ml(-1)). Several other species were also transformed by A. rhizogenes carrying pBin19 and A. rhizogenes harbouring a different binary factor, pAGS125 (Van den Elzen et al., 1985), was used to transform N. rustica hairy roots to confer hygromycin B resistance.
authors.affiliation: Dept. of Genetics and Microbiology, Institute of Food Research (Norwich Laboratory), Colney Lane, NR4 7UA, Norwich, UK.
authors.forename: J D
authors.initials: JD
authors.lastname: Hamill
authors.forename: A
authors.initials: A
authors.lastname: Prescott
authors.forename: C
authors.initials: C
authors.lastname: Martin