THE GENETIC STRUCTURE OF THE INCOMPATIBILITY FACTORS IN SCHIZOPHYLLIUM COMMUNE

Abstract
Schizophyllum commune typifies the bifactorial incompatibility system in which alternate incompatibility factors of 2 series, A and B, assert independently at meiosis to yield progeny of four distinct, self-sterile, mating types. Sexual interaction between mycelia belonging to the different mating types to yield dikaryotic mycelia is restricted to those combinations that are heterozygous for both A and B factors. A broad examination of sexuality in S. commune is presented with a view toward elucidation of the genetic structure of these incompatibility factors.

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