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Journal of Nutrition Vol. 59 No. 2 June 1956, pp. 197-209
Copyright © 1956 by American Society for Nutrition
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Reproduction and Lactation of Rats Receiving Corn Oil or Butterfat in the Presence of Sulfathalidine1

T. Viswanatha2 and Irvin E. Liener

Department of Agricultural Biochemistry, University of Minnesota, St. Paul

Corn oil and butterfat in the presence of 2% sulfathalidine have been compared with respect to their ability to promote reproduction and lactation of female rats in successive litters and generations.

In studies on the parent generation, the postnatal mortality of the young from mothers on the corn oil diet ranged from 9 to 48% within the first three days, tending to be highest after the second gestation period. When corn oil was replaced with butterfat almost complete survival of the young was obtained. Lactation performance, as judged by the weight of the young at weaning and the weight change of the mother during lactation, was also significantly in favor of butterfat.

The F1 females on corn oil produced litters in which the first three-day mortality rate was 12 and 42% in the first and second litters respectively, whereas the F2 females on the same diet had litters in which very few of the young succumbed. Essentially complete survival of the young from all of the females receiving butterfat was again observed. No difference in lactation performance could be noted between the F1 and F2 females on corn oil and those on butterfat.

Possible explanations for these results are considered.

1 Paper no. 3467, Scientific Journal Series, Minnesota Agricultural Experiment Station. This work has been supported by a grant from the American Dairy Association.

2 Present address: Department of Biochemistry, Indian Institute of Science, Bangalore, India.

Manuscript received 23 November 1955.




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