Abstract
An electrophoretic karyotype of the filamentous fungus Podospora anserina has been obtained using contour-clamped homogeneous electric field gel electrophoresis. Six chromosomal bands were separated with one migrating as a doublet. The size of the chromosomes was estimated to be between 3.8 and 6.0 megabase pairs (mb) using the chromosomes of Schizosaccharomyces pombe as size standards, giving a total genome size of about 34 mb for the P. anserina genome. Homologous probes were used to assign five of the seven linkage groups (LGs) to chromosomal bands on the gel. Analysis of reciprocal translocation strains allowed us to complete the karyotype. In decreasing size order, the P. anserina chromosomes are LG I (6.0 mb); LG II (5.5 mb); LG V (5.1 mb); LG III (4.9 mb); LGs VI and VII (4.3 mb) and LG IV (3.8 mb).
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