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Genetics

Mating Groups in Fusarium moniliforme. W. H. Hsieh, Former Graduate Student, Department of Plant Pathology, University of California, Berkeley, CA 94720, Present address of senior author: Taiwan Sugar Experiment Station, 54 Sheng Chaan Road, Tainan, Taiwan, Republic of China; S. N. Smith(2), and W. C. Snyder(3). (2)(3)Plant Pathologist, and Professor Emeritus, respectively, Department of Plant Pathology, University of California, Berkeley, CA 94720. Phytopathology 67:1041-1043. Accepted for publication 4 March 1977. Copyright © 1977 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-67-1041.

Crossing attempts with 60 Fusarium moniliforme isolates on a variety of media, yielded 19 isolates that formed the Gibberella stage. These cultures fell into three mating groups that were not interfertile, in that perithecia were not formed by mating any two cultures of different mating groups regardless of their sex and compatibility characteristics. For perithecium production for two mating groups, V-8 juice agar was an excellent medium, whereas perithecia in the other mating group were produced more abundantly on rice straw or other natural media in PDA. Perithecia formed most abundantly at 20 C under 12-hr alternating light and dark than at higher or lower temperatures, constant light, or constant darkness.