J. Anim Sci.
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J. Anim Sci. 1959. 18:947-953.
© 1959 American Society of Animal Science
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A Comparison of Certain Blood Constituents of Dwarf-Carrier and Non-Carrier Cattle1

J. C. Dollahon2, M. Koger, J. F. Hentges and A. C. Warnick3

Florida Agricultural Experiment Station,,4 Gainesville

Abstract

For a number of years research workers have been conducting investigations in search of anatomical, physiological or chemical factors which could be used to differentiate between dwarf-carrier and non-carrier cattle. To aid in this search investigations were undertaken on certain blood constitutents of non-carrier cattle and of carriers of the gene for dwarfism described by Johnson et al. (1950).

The literature reveals only limited information on the blood constituents of dwarfs and dwarf-carrier animals as compared with those of noncarrier animals. Studies by Fransen and Andrews (1954), Andrews et al. (1956) and Cornelius et al. (1956) indicated that the formed elements of the blood were similar in dwarf and normal cattle. Foley et al. (1956) reported cell counts and blood sugar levels were similar in dwarf-free and carrier cattle, but that changes due to insulin shock were different in the two genotypes.

A study by Leuchtenberger et al. (1956) showed that the desoxyribonucleic acid (DNA) content of individual spermatogeuic cells from one dwarf and two suspected carriers was markedly deficient as compared with corresponding cells of normal bulls.

Footnotes

1 Florida Agricultural Experiment Station Journal Series, No. 867.

2 Present address: Mississippi State College, State College, Mississippi.

3 With the technical assistance of J. T. McCall and J. P. Feaster.

4 Department of Animal Husbandry and Nutrition. In cooperation with Southern Regional Beef Cattle Breeding Project (S-10).






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Copyright © 1959 by the American Society of Animal Science.