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Genetic aspects of piglet survival and related traits: a review.

Authors
  • Knol, Egbert F1
  • van der Spek, Dianne1
  • Zak, Louisa J1
  • 1 Topigs Norsvin Research Center, Beuningen, GE, 6641 SZ, The Netherlands. , (Netherlands)
Type
Published Article
Journal
Journal of animal science
Publication Date
Jun 01, 2022
Volume
100
Issue
6
Identifiers
DOI: 10.1093/jas/skac190
PMID: 35708592
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Piglet survival is under genetic control and there are clear differences between individuals in their ability to live. Animals that do not survive their first weeks will obviously not reproduce as this is natural selection. Animals that survive still harbor relevant genetic differences. The genomic toolset, the use of genetic markers, makes it possible to link each animal to all others in the population, alive or dead, creating good opportunities for selection. Piglet survival depends on the genetic make-up of 1) the piglet itself, is it vital and heavy enough, 2) of the mother, are the piglets born at term, with low variation in birth weight, and 3) of the sow nursing the piglets, often the mother, does she allow the piglets to drink enough colostrum and milk of enough quality? This review explores the black box approach, complex statistical analysis of very large scale genomic recording of survival data, and it explores the biological approach, the influences of gestation length, birth weight, uniformity, number of teats, colostrum, etc., on birth weight. There is little doubt that genetic selection can increase survival of piglets. The challenge is to do this selection in balance with other production traits, such as litter size and body composition.

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