Homothallism in an Undescribed Species of Cochliobolus and in Cochliobolus kusanoi

Abstract
A new species, Cochliobolus homomorphus Luttrell and Rogerson (Ascomycetes), with the imperfect stage Helminthosporium homomorphus Luttrell and Rogerson developed on agar media or on sterilized plant parts in a culture isolated from air in Kansas. Single-ascospore analysis proved that C. homomorphus and C. kusanoi (Nisik.) Drechs. ex Dastur are homothallic. Light was essential for formation of perithecia in these 2 species, whereas perithecia of the heterothallic speices C. nodulosus Luttrell and C. heterostrophus (Drechs.) Drechs. developed in total darkness.

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