Identification and characterization of chromosome length polymorphisms among strains representing fourteen races of Ustilago hordei.

In this study we report the electrophoretic karyotype of strains representing 14 races of U. hordei. A high degree of karyotypic variability was observed among individual strains representing each of the races but not among strains derived from individual meiotic tetrads, although the segregation of a chromosome length polymorphism in one meiotic tetrad was observed. The strains showed a high degree of similarity of the total soluble protein complement using sodium dodecyl sulfate (SDS)-PAGE. We have begun to define linkage groups using random DNA fragments