Summary
A whole plant selection system using the haploid gametophyte generation of the fern Ceratopteris richardii has been developed to select for mutations that confer resistance or tolerance to various selection pressures. The expression of the mutations can be analyzed and characterized in both the haploid gametophyte and diploid sporophyte generations. Genetic analyses are facilitated by the fern's rapid life cycle and the ease of manipulating the gametophyte generation. Selection for tolerance to the herbicide paraquat has yielded two mutants which have an increased tolerance to the herbicide in both the gametophyte and sporophyte generations. Both mutants exhibit single nuclear gene inheritance patterns and appear to be closely linked or allelic.
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Communicated by P. Maliga
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Hickok, L.G., Schwarz, O.J. An in vitro whole plant selection system: paraquat tolerant mutants in the fern Ceratopteris . Theoret. Appl. Genetics 72, 302–306 (1986). https://doi.org/10.1007/BF00288565
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DOI: https://doi.org/10.1007/BF00288565