Campus Units

Animal Science, Biochemistry, Biophysics and Molecular Biology, Veterinary Diagnostic Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

1987

Journal or Book Title

Journal of Animal Science

Volume

64

Issue

2

First Page

414

Last Page

419

DOI

10.2134/jas1987.642414x

Abstract

Data from 52 litters farrowed in two seasons of a cross-fostering experiment were analyzed to estimate variances and covariances for additive direct and maternal genetic effects on immune response to pseudorabies virus and B. bronchiseptica vaccine. Twenty purebred boars and 44 sows of the Duroc, Landrace and Yorkshire breeds were used. Immune response was measured after vaccine challenge. A modified-live pseudorabies (PR) vaccine was administered to piglets at 28 d of age; response was measured by log, serum neutralization titers at 56 d. An inactivated B. bronchiseptica bacterin was administered at 28, 42 and 112 d. Antibody levels were measured relative to positive and negative controls at 28, 56 and 119 d by using an enzyme-linked immunosorbent assay (ELISA). Results from this study for heritability were .18 ± .09 for PR titer and .15 ± .07 and .52 ± .15 for 56- and 119-d ELISA values, respectively. The variability due to nurse environment (maternal genetic variance and common environmental variance) as a percentage of phenotypic variance was 11.1% for PR titers and 29.6 and 8.8% for 56- and 119-d ELISA values, respectively. The heritabilities estimated in this study indicate that, if improved immune response to vaccines is desired, selection may be useful. However, the importance of maternal environment would make early selections less accurate than selections based on immune response measured later in life.

Comments

This is an article from Journal of Animal Science 64 (1987): 414, doi:10.2134/jas1987.642414x. Posted with permission.

Copyright Owner

American Society of Animal Science

Language

en

File Format

application/pdf

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