Mutagenic Action of Ethyl Methanesulfonate in Maize

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Science  29 Mar 1963:
Vol. 139, Issue 3561, pp. 1296-1297
DOI: 10.1126/science.139.3561.1296


Pollen of corn plants carrying three closely linked genes (α β Sh2) on chromosome 3 were treated by ethyl methanesulfonate in order to determine the nature of genetic changes produced. In this genetic material the loss of the β gene alone represents a discrete genetic change, possibly a point mutation, while the loss of two or more markers represents chromosome aberrations. Ethyl methanesulfonate, x-rays, and ultraviolet light all induced numerous chromosome aberrations, but only ultraviolet light and probably ethyl methanesulfonate induced discrete genetic changes.