PMID: 8593689Nov 1, 1995Paper

Inactivation of transgenes in Phytophthora infestans is not associated with their deletion, methylation, or mutation

Current Genetics
H S Judelson, S L Whittaker

Abstract

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.

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Citations

Sep 1, 1996·Somatic Cell and Molecular Genetics·P K Schmidt-KastnerM W McBurney
Mar 26, 2016·Frontiers in Plant Science·Stephanie R BollmannNiklaus J Grünwald
Sep 3, 2014·Molecular Plant Pathology·Sophien KamounFrancine Govers
Feb 18, 2003·Current Genetics·Cristina Cvitanich, Howard S Judelson
Mar 17, 2021·Molecular Plant Pathology·Audrey M V Ah-FongHoward S Judelson
Dec 31, 1997·Fungal Genetics and Biology : FG & B·H S Judelson
Apr 21, 2021·Environmental Microbiology Reports·Fernando Uriel Rojas-Rojas, Julio C Vega-Arreguín

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