Complementary mating types of Mucor circinelloides show electrophoretic karyotype heterogeneity

Abstract

Electrophoretic karyotypes of ten strains of Mucor circinelloides f. lusitanicus were generated by contour-clamped homogeneous electric field (CHEF) gel-electrophoresis. Most of the strains analyzed showed polymorphisms, but a different main karyotype pattern could be correlated with each mating type. Genome structure was further analyzed by gene assignment to the chromosome-sized DNAs. Nonradioactive hybridization techniques identified the chromosomal localization of seven cloned genes. The hybridization patterns confirmed the similarity between the mating-type (−) strains and showed some heterogeneity among the mating-type (+) strains. Linkage was found between genes pyrF and chs3 in all the strains, between the gene leuA and the rDNA in all mating-type (−) strains and ATCC 1216b (+), and between chs2 and the rDNA in CBS 969.68 (+). This is the first time that gene linkage in M. circinelloides has been reported, but in some cases the linkage relationships obtained are strain-dependent.

DOI: 10.1007/s002940050513

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@article{DazMnguez1999ComplementaryMT, title={Complementary mating types of Mucor circinelloides show electrophoretic karyotype heterogeneity}, author={Jos{\'e} Mar{\'i}a D{\'i}az-M{\'i}nguez and Mª Angeles L{\'o}pez-Matas and Arturo P. Eslava}, journal={Current Genetics}, year={1999}, volume={36}, pages={383-389} }