Breeding and Genetics

Factsheets

Introduction to Swine Genetics for Small and Beginning Farmers

Publish Date: 09/21/2015

The performance of pigs is the result of two influences: genetics and environment. Because the genetics of a pig plays an important role in its performance and meat quality, all pig producers should be familiar with the potential and application of genetic selection. This factsheet provides an introduction to genetic principles and selection strategies for beginning pig farmers.


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Replacement Gilt Evaluation and Selection Pocket Guide

Publish Date: 08/19/2014

This pocket guide is designed to help pork producers more effectively screen replacement gilt candidates before placing them in their breeding herds.  Visual appraisal can help identify replacement gilts with various problems that negatively impact sow longevity. The items shown in the pocket guide include conformation and structural soundness, feet and leg abnormalities, and reproductive soundness (underlines, external genitalia).  Identifying replacement…


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Univ. of NE-Lincoln: Effect of DNA Markers in Nebraska Selection Lines

Publish Date: 07/02/2012

DNA from 57 generation-28 boars that had sired progeny in the NE selection and control lines was submitted to GeneSeek Inc., where genotypes for eight Single Nucleotide Polymorphic Markers (SNPs) affecting economic traits in pigs were determined. Three markers are reported to be associated with growth and composition of growth, three with meat quality, and…


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Univ. of NE-Lincoln: Effects of Crystalline Lactose on Expression

Publish Date: 07/02/2012

A preliminary experiment was conducted to evaluate the effects of crystalline lactose on the relative abundance of sodium-dependent glucose transporter (SGLT)-1 mRNA in vitro in model porcine jejunal epithelial cells (IPEC-J2). Cells were treated with low (28 mM) or high (56 mM) concentrations of lactose alone or in combination with lipopolysaccharide (LPS; 10 ng/mL). Total…


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North Carolina Pork Council Report: Genetic selection criteria and management practices that improve productivity and pig value of below average birth weight piglets

Publish Date: 07/02/2012

This project included three experiments conducted over a two year time frame. 1. Genetic relationship between individual piglet birth weight and performance traits. 2. Effect of piglet birth weight on body weight, growth, backfat, muscle, survival and quality of commercial market swine. 3. Effect of piglet birth weight on efficiency of commercial market swine. Complete…


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IA State Univ. Report 2012: DND1 Expression and Function in the Porcine Ovary, Oocyte

Publish Date: 07/02/2012

DND1 (dead end homolog 1), belonging to the RNA binding protein family, can impact miRNA:mRNA functional pathway and in turn may contribute to maintaining normal oocyte growth and quality as well as embryo development following fertilization. To characterize DND1 in pig maturing oocytes and cumulus cells, and early embryos, we examined DND1 mRNA and protein…


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IA State Univ. Report 2012: Utility and Efficiency of Homologous Recombination for Introducing Targeted Modifications to the Pig Genome

Publish Date: 07/02/2012

The production and utilization of genetically modified animals greatly improves their utility in agriculture, as biomedical research models of human disease, for the production of recombinant pharmaceutical proteins, and for production of organs with greater potential for xenotransplantation. While numerous strategies have been utilized in the production of transgenic large animals, cell-based transgenesis followed by…


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Genetic Line Influences Pig Growth Rate Responses to Vaccination for Porcine Circovirus Type 2

Publish Date: 07/02/2012

This article was published in the Journal of Swine Health and Production, Jan./Feb. 2012. The objectives are to compare the effects of porcine circovirus type 2 (PCV2) vaccination on growth rate, backfat depth and loin depth of pigs in a high-health herd which contained different genetic lines.   


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IA State Univ. Report 2012: Prenatal and Postnatal Dietary n-3 Fatty Acid Supplementation Alters Buffy Coat DNA Methylation Profile in Pigs

Publish Date: 07/02/2012

The objective of this study was to determine the effect of maternal long chain n-3 fatty acid supplementation on the DNA methylation profile of offspring buffy coats. We demonstrated several methylated regions across the genome were influenced by maternal n-3 dietary treatment.


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Factsheets

Multiple Trait Selection For Pork Improvement

Publish Date: 04/19/2012

One of the most important decisions breeders make is choosing which traits to improve in their herds. Breeders must decide among numerous traits of economic importance and determine whether to improve performance a small amount in several traits or make larger amounts of improvement in fewer traits.


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