Genetic selection against intrauterine growth retardation in piglets: a problem at the piglet level with a solution at the sow level

Genetics, Selection, Evolution : GSE
Stephanie M MathesonS A Edwards

Abstract

In polytocous livestock species, litter size and offspring weight act antagonistically; in modern pig breeds, selection for increased litter size has resulted in lower mean birth weights, an increased number of small piglets and an increased number of those affected by varying degrees of intrauterine growth retardation (IUGR). IUGR poses life-long challenges, both mental, with morphological brain changes and altered cognition, and physical, such as immaturity of organs, reduced colostrum intake and weight gain. In pigs, head morphology of newborn piglets is a good phenotypic marker for identifying such compromised piglets. Growth retardation could be considered as a property of the dam, in part due to either uterine capacity or insufficiency. A novel approach to this issue is to consider the proportion of IUGR-affected piglets in a litter as an indirect measure of uterine capacity. However, uterine capacity or sufficiency cannot be equated solely to litter size and thus is a trait difficult to measure on farm. A total of 21,159 Landrace × Large White or Landrace × White Duroc piglets (born over 52 weeks) with recorded head morphology and birth weights were followed from birth until death or weaning. At the piglet level, the est...Continue Reading

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Citations

Sep 13, 2019·Reproduction in Domestic Animals = Zuchthygiene·Claudio OlivieroOlli Peltoniemi
Aug 19, 2020·Journal of Animal Science·Olli PeltoniemiStefan Björkman
Jul 27, 2020·Translational Animal Science·Julie A FeldpauschMatthew J Ritter
Nov 23, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Shinichiro Ogawa, Masahiro Satoh
Dec 16, 2020·Journal of Animal Science·Sheila Aikins-WilsonSven König
Jan 31, 2021·Journal of Animal Science·Sheila Aikins-WilsonSven König
Sep 3, 2021·Domestic Animal Endocrinology·F R C L Almeida, A L N Alvarenga Dias

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