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The Journal of Heredity 1984:75(4):242-246
© 1984 The American Genetic Association 75:242-246

research-article

Induction of plastid mutations in tomatoes by nitrosomethylurea

Linda P. Hosticka, and Maureen R. Hanson

Department of Biology, Gilmer Hall, University of Virginia Charlottesville, VA 22903

Abstract

Treatment of seed of Lycopersicon species with nitrosomethylurea (NMU) was highly effective for producing chimaeras segregating for plastid mutations in the M1 generation. Variegation rates as high as 93 percent were obtained when seed of the cultivated tomato, L. esculentum, were treated with NMU, while seed viability remained high. Although variegated plants of two wild species, L. hirsutum and L. penneill, also appeared following NMU treatment, seed viability was much reduced at all treatment times tested. Genetic analysis of two variegated L. esculentum plants verified that the chlorophyll-deficient mutations were cytoplasmically inherited. Segregation data regarding chlorophyll-deficient mutants that appeared in the M2 and M3 generations indicated that nuclear-encoded as well as plastid-encoded mutations can be induced by NMU.


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[Abstract] [PDF]


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