On the frequency and transmitted chromosome alterations and gene mutations induced by atomic bomb radiations in maize

Samples of maize seed of the single cross L289 X I205 were placed on some of the ships within the target area at Bikini at the time of the atomic bomb test of July 1, 1946. At about the same time Dr. L. F. Randolph exposed duplicate samples to x-rays at Cornell University. Plantings were made at the California Institute of Technology of both series together with untreated controls. From these plants, sporocyte samples were collected by Dr. Randolph for studies at Cornell University on the visible chromosomal changes induced by the radiations (Randolph, Longley and Li in press). Studies on hereditary effects have been carried on at the California Institute of Technology in cooperation with the United States Department of Agriculture and the Naval Medical Research Section of Operation Crossroads