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The Butterfat Records of Cows Possessing Supernumeraries Compared with Cows Having the Normal Number of Teats^*

Missouri Agricultural Experiment Station, Columbia, Missouri

ABSTRACT

It is not an uncommon occurrence to have dairy cattle breeders question whether or not cows with supernumerary teats are superior in producing capacity to those that do not show the polythelial condition. As was described in an earlier paper, Gifford (2) these "extra teats" or supernumeraries are found quite commonly in dairy cattle and are usually of three types. They have been described as caudal, or those found in the rear of the normal teats, intercalary or those found between the normal, and ramal or those that are ramifications or branches of the normal.

In Russia and some other European countries, it has been reported that there is a prevailing belief among dairy cattle breeders that the presence of supernumeraries is evidence of abundant milk supply. In other words, the observations of these breeders have led them to believe that there is closely linked with the genes for the character capacity for large amounts of milk, the genes responsible for the development of the polythelial condition.

^* Contribution from the Department of Dairy Husbandry, Missouri Agricultural Experiment Station, Journal Series No. 379.