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Thesis (M.S.)--University of Nebraska--Lincoln, 1957. Department of Agronomy.


Copyright 1957, the author. Used by permission.


The purpose of this experiment was to determine the effect of ionizing radiations, thermal neutrons and X-rays, on the genetic variance in the R2 generation of the economically important quantitative characters plant height, maturity, yield seed weight, and lodging in soybeans and from these data determine the practicability of ionizing radiations as a tool for the soybean breeder.

Adams and Hawkeye varieties of soybeans were irradiated with various dosages of thermal neutrons and X-rays. Progenies of 100 selected R2 plants for each type of radiation and each variety were grown in 1956 along with 100 control progenies from each variety in a test designed to measure genetic variability among the selected R2 plants by the performance of the progenies.

Advisor: Donald C. Hanway.