Geographical Distribution of Mating Types in Gibberella cyanogena (Desm.) Sacc.

Abstract

Gibberella cyanogena, the ascomycetous stage of Fusarium sambucinum Fuckel f. 6 Wr., has been previously reported¹ to be bisexual (hermaphroditic) and self-sterile. In other words, single-ascospore and monoconidial cultures of this fungus belong to one or other of two mating types, designated m.t.^A and m.t.^a, both of which may function as male and female but are self-sterile. For the production of fertile perithecia under laboratory conditions it is necessary to bring together cultures of the two mating types and maintain them under the appropriate environmental conditions.