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- W4251095770 abstract "We have used three inbreds of Zea mays in our in situ and laboratory studies in environmental mutagenesis. Inbred W22 plants homozygous for wx-C were used in a study to detect the possible mutagenic properties of 32 pesticides or combination of pesticides under modern agricultural conditions. The large numbers of pollen grains analyzed and the ease in detecting mutant pollen grains enabled us to treat the experimental plants with field recommended rates of pesticides. In a current study we are evaluating the possible mutagenicity of Chicago municipal sewage sludge. We are measuring the frequency of mutant pollen grains in inbred M14 at both the wx-C and wx-90 heteroalleles. These plants were exposed to various concentrations of municipal sewage sludge under field conditions. We have inbred Early-Early Synthetic for five generations and tested this inbred with known mutagens. Early-Early Synthetic is a rapidly maturing inbred growing from kernel to anthesis in approximately 4 weeks and attaining a height of approximately 50 cm. Plants of this inbred have been chronically treated with ethylmethanesulfonate (EMS) or maleic hydrazide (MH) under laboratory conditions and forward mutation at the wx locus was measured in the pollen grains. EMS and MH were mutagenic at concentrations of 1 microM and 10 nM, respectively. The concentrations of EMS and MH were calibrated in Early-Early Synthetic to a linear increase in the frequency of forward mutant pollen grains. The construction of a maize monitor for environmental mutagens is currently in progress. This assay will measure forward or reverse mutation at the wx locus in pollen grains, point mutation in somatic cells and will incorporate a cytogenetic endpoint in root-tip cells." @default.
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- W4251095770 date "1981-01-01" @default.
- W4251095770 modified "2023-10-18" @default.
- W4251095770 title "Germinal Cell Mutagenesis in Specially Designed Maize Genotypes" @default.
- W4251095770 doi "https://doi.org/10.2307/3429251" @default.
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