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Interspecific allozyme variation among Morchella spp. and its inferences for systematics within the genus |
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| Authors: | Daniel J Royse and Bernie May |
| Institution: | a Mushroom Research Center, Department of Plant Pathology, Pennsylvania State University, University Park, PA 16802, U.S.A. b The Cornell Laboratory for Ecological and Evolutionary Genetics, Department of Natural Resources, Cornell University, Ithaca, NY 14853, U.S.A. |
| Abstract: | The genetic variability of 12 enzymes encoded by 12 loci (Fum, Gapdh, Gpi, Idh, Lap, Mpi, Me, Pgk, Pgd, PepGI, Sod and Tpi) was examined by horizontal starch gel electrophoresis and standard histochemical staining in 19 lines of Morchella spp. The lines could be separated into eight genotypic classes based on their multilocus allelic combinations. Several isolates originally recorded as one species based on morphology were classified as another based on electrophoretic banding patterns. This lack of concordance between allozymic and morphological data sets may help to explain the taxonomic difficulties within the genus. In general, two groupings of the six morphologically identified species could be recognized (M. angusticeps, M. conica and M. elata vs M. esculenta, M. crassipes and M. deliciosa). |
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