HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Garwood, V. A. Articles by Heidenreich, C. J. Search for Related Content PubMed Articles by Garwood, V. A. Articles by Heidenreich, C. J.

Prenatal and Postnatal Influences on Weight and Backfat Thickness of Pasture-Raised Swine^{1, 2,}

Purdue University Agricultural Experiment Station, Lafayette, Indiana

Abstract

The relative importance of pre- and post-natal effects and of their interactions upon pig weights at 56, 112 and 154 days of age and backfat thickness at 90 kg. was determined by a cross-nursing design. Two litters farrowed within the same 12-hr, period comprised a set. Pigs reared as a litter were penned separately for 3 weeks. Subsequently, they were pastured with other litters of sim- ilar age. Under these conditions, postnatal effects had no influence upon the traits. Prenatal influences represented 10% of the total variance at 56 days of age, but only 4% at 154 days of age. Interactions of the main effects were large, accounting for 9 to 14% of the variance.

¹ Approved as Journal Paper No. 2833 by Agriculture Experiment Station, Animal Sciences Department, Purdue University, Lafayette, Indiana.

² In cooperation with the Regional Swine Breeding Laboratory, A. H.R.D., A.R.S., U.S.D.A.

³ Present address: Biometrical Services, A.R.S., U.S.D.A., Beltsville, Maryland.

⁴ Present address: School of Agriculture, Wisconsin State University, Platteville.