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Inheritance and alteration of transforming DNA during an induced parasexual cycle in the imperfect fungus Cladosporium fulvum

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Authors
Arnau, J.
Oliver, Richard
Date
1993
Type
Journal Article

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ARNAU JA & OLIVER RP (1993) Inheritance and alteration of transforming DNA during an induced parasexual cycle in the imperfect fungus Cladosporium fulvum. Current Genetics 23 508-511
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Department of Environmental & Agriculture
School of Agriculture and Environment
Faculty of Science and Engineering
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A copy of this item may be available from Professor Richard Oliver

Email: Richard.oliver@curtin.edu.au

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Abstract

Protoplasts of a pAN7-1-transformed isolated of Cladosporium fulvum race 4, harbouring a tandem duplication of the vector, and an untransformed race 5 isolate were fused, without selection for the presence of vector sequences. Fusion products were allowed to haploidize spontaneously. The inheritance of pAN7-1 sequences and the expression of the hph gene was studied in 85 progeny. A very high proportion (80%) of the progeny contained vector sequences and 70% of the progeny were resistant to hygromycin. Inactivation of the hph gene occurred in eight progeny. Rearrangement of vector sequences can account for the inactivation: there is no evidence for any RIP-like mechanism. A number of novel bands were observed.