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Inheritance of Teat Number and Relationship of Teat Number to Various Maternal Traits in Swine¹

University of Minnesota, St. Paul

Abstract

The estimates of heritability of total teat number obtained in a population of Minnesota No. 1 swine were 0.10±0.04 from the dam-offspring regression analysis and 0.23±0.20 from the paternal half-sib correlation. The regressions of various maternal traits on total teat number were small and statistically non-significant for the traits considered. Significant regression values of 0.27 and 11.70 were found for the regression of number of pigs weaned and pounds of pig weaned on functional teat number after removing the effect of number of pigs born alive.

¹ Paper No. 4642, Scientific Journal Series Of The Minnesota Agricultural Experiment Station With Cooperation Of A.H.R.D., A.R.S., The Regional Swine Breeding Laboratory, U. S. Department of Agriculture.

² The authors are indebted to the late August B. Salmela, Animal Husbandman at the North Central Experiment Station at Grand Rapids and Louis Hanson, Herdsman, for collection of the data.