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Mutant derivation and parasexuality in a cellulolytic strain of Aspergillus niger

Gustavo Henrique Goldman; João Lúcio de Azevedo

Departamento de Genética, ESALQ/USP, Caixa Postal 83, 13400 Piracicaba, SP, Brasil. Send correspondence to J.L.A.

ABSTRACT

A genetic study was made of an industrial strain of Aspergillus niger. Growth on different culture media was tested and auxotrophic and morphological mutants were isolated. Heterokaryons were produced between pairs of auxotrophic mutants, and phototrophic colonies recovered from them. These were probably haploid, prototrophic recombinants derived from a para-meiotic process.

Keywords: Parasexuality; Aspergillus niger.

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