Inactivation of transgenes in Phytophthora infestans is not associated with their deletion, methylation, or mutation
| Autor: | Susan L. Whittaker, Howard S. Judelson |
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| Rok vydání: | 1995 |
| Předmět: |
Genetic Markers
Phytophthora Kanamycin kinase Genes Fungal Molecular Sequence Data Mitosis medicine.disease_cause Methylation Transformation Genetic Gene Expression Regulation Fungal Genetics medicine Gene silencing Transgenes Selection Genetic Promoter Regions Genetic Gene In Situ Hybridization Glucuronidase Oomycete Mutation Base Sequence Kanamycin Kinase biology Reproduction General Medicine biology.organism_classification Molecular biology Meiosis Phosphotransferases (Alcohol Group Acceptor) Phytophthora infestans DNA methylation Cell Division Gene Deletion |
| Zdroj: | Current Genetics. 28:571-579 |
| ISSN: | 1432-0983 0172-8083 |
| DOI: | 10.1007/bf00518171 |
| Popis: | The mitotic and meiotic stabilities of transgenes were evaluated in the oomycete, Phytophthora infestans. Genes encoding beta-glucuronidase (GUS), neomycin phosphotransferase (NPT) and hygromycin phosphotransferase (HPT), fused to one of six promoters from P. infestans or other oomycetes, were usually stably expressed during continued asexual culture and transmitted to progeny. However, the activity of these genes became undetectable in many strains during asexual or sexual propagation. Over 33 months of growth, transgene expression stopped each month in 1-3% of the transformants. Silencing of the genes was not associated with their deletion, mutation, or hypermethylation. The conformation of the integrated sequences was similar in strains destined to continue or terminate expression of the transgenes. Expression of the genes was not associated with a loss of fitness during growth in vitro and in planta, which might otherwise have selected for silencing events. |
| Databáze: | OpenAIRE |
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