Responses to Selection for Body Weight in Descendants of X-Irradiated Rats |
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Authors: | Daniel Gianola A. B. Chapman J. J. Rutledge |
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Affiliation: | University of Wisconsin, Madison 53706 |
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Abstract: | The effectiveness of selection for high and low body weight at six weeks of age was studied in descendants of X-irradiated (R) and nonirradiated (C) inbred rats. There were two replicates of each of the direction of selection-irradiation treatments. In C lines, there were no consistent responses to selection, probably due to a low level of genetic variability. In R rats, selection was effective only for decreased body weight. The results of this experiment do not suggest the use of irradiation combined with selection as a means of enhancing responses to selection in animals. |
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