Abstract
A procedure for stable transformation was developed for Phytophthora megasperma f. sp. glycinea, an oomycete pathogen of soybean. Transformants were obtained using a bacterial hygromycin resistance gene fused to a promoter and terminator from the ham34 gene of another oomycete, Bremia lactucae. Vector DNA, alone or complexed to cationic liposomes, was introduced into protoplasts using polyethylene glycol and CaCl2. DNA and RNA hybridization, and phosphotransferase assays, confirmed the presence and expression of vector DNA in the transformants. Hybridization to electrophoretically separated chromosomes of P. m. glycinea showed that vector DNA had integrated into only one chromosome in four transformants, and into multiple chromosomes in one transformant.
MeSH Terms
Chromosome Mapping
DNA, Fungal/genetics
Drug Resistance, Microbial
Gene Expression
Genetic Vectors
Phosphotransferases/genetics
Phosphotransferases (Alcohol Group Acceptor)
Phytophthora/genetics
Chemicals
DNA, Fungal
Phosphotransferases
Phosphotransferases (Alcohol Group Acceptor)
hygromycin-B kinase
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Judelson H S
Department of Vegetable Crops, University of California, Davis 95616.
Coffey M D
Arredondo F R
Tyler B M
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