Homoeologous Heterozygosity and Recombination in the Fern Pteridium aquilinum

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Science  15 Jun 1979:
Vol. 204, Issue 4398, pp. 1207-1209
DOI: 10.1126/science.204.4398.1207


The bracken fern, Pteridium aquilinum, which can form completely homozygous zygotes in a single generation of self-fertilization, has a genetic system that allows the storage and release of genetic variability in spite of this homozygosity. Analysis of the distribution of electrophoretically demonstrable genetic markers demonstrates that this system is based on recombination between duplicated, unlinked loci.