1. In an F₂ population of perennial teosinte obtained from seed brougnt from the original station in Mexico, an abererant individual appeared in which the meiotic chromosome behavior was similar to Beadle's "asynaptic." Synapsis was essentially normal up to early diakinesis. Thereafter desynapsis caused an almost complete disappearance of quadrivalents and bivalents at metaphase. The scattered arrangement of univalents in the meta-anaphase stage strikingly resembled incompatible hybrid chromosome behavior. The mutant is highly cross- and self-sterile although the pollen was approximately 35% well filled. Fortunately, it can be maintained easily for further tests by vegetative propagation.

L. F. Randolph and Harold E. Fischer