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The Journal of Heredity 1987:78(3):201-203
© 1987 The American Genetic Association 78:201-203

other

Inheritance of three isozyme loci in the diploid fern, Asplenium platyneuron

Douglas A. Dedera, Undergraduate honors student, and Charles R. Werth, Assistant professor

Department of Biology, University of Richmond Richmond, VA 23173

Requests for reprints should be addressed to C. Werth, Department of Botany, University of Kansas, Lawrence, KS 66045.

Abstract

Inheritance of isozyme phenotypes was investigated in the diploid (n = 36) fern Asplenium platyneuron. Spores were harvested from individual sporophytes putatively heterozygous for two or more of the following three loci: phosphoglucose isomerase (PGl-2), phosphoglucomutase (PGM-2), and glutamate-oxaloacetate transaminase (GOT-1). Haploid gametophyte progeny, obtained by sowing these spores on mineral agar, were subjected to starch gel electrophoresis and stained for the three enzymes. Each gametophyte expressed only a single putative allele for each locus, and segregation was consistent with the expected 1:1 ratio, confirming the hypothesized genetic interpretations. Assortment of the three loci was determined to be independent. The number of loci coding these three enzymes is consistent with that generally reported for diploid plants, indicating that A. platyneuron is genetically diploid despite a possible paleopolyploid ancestry for the genus.


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