Clustering of multiple transgene integrations in highly-unstable Ascobolus immersus transformants (original) (raw)
Abstract
A large proportion of Ascobolus immersus transformants are highly unstable in crosses: the phenotype conferred by the transgene is not transmitted to the progeny, irrespective of the endogenous or foreign origin of the transgene. They all have integrated multiple transgene copies, clustered at a single chromosomal site or at tightly-linked sites. Clustered non-homologous integrations are always rearranged. Yet they never escape the “methylation induced premeiotically” (MIP) process. This always results in gene silencing, even when the transgene is partially repeated, accounting for the high instability of these transformants.
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Authors and Affiliations
- Institut de Génétique et Microbiologie, CNRS URA 1354, Université Paris-Sud, Bâtiment 400, F-91405, Orsay cedex, France
Laïla Rhounim, Annie Grégoire, Salah Salama & Godeleine Faugeron
Authors
- Laïla Rhounim
- Annie Grégoire
- Salah Salama
- Godeleine Faugeron
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Communicated by O. C. Yoder
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Rhounim, L., Grégoire, A., Salama, S. et al. Clustering of multiple transgene integrations in highly-unstable Ascobolus immersus transformants.Curr Genet 26, 344–351 (1994). https://doi.org/10.1007/BF00310499
- Received: 21 December 1993
- Accepted: 28 February 1994
- Issue Date: October 1994
- DOI: https://doi.org/10.1007/BF00310499