A genome-wide association study in large white and landrace pig populations for number piglets born alive

PloS One
Sarah Bergfelder-DrüingErnst Tholen

Abstract

The number of piglets born alive (NBA) per litter is one of the most important traits in pig breeding due to its influence on production efficiency. It is difficult to improve NBA because the heritability of the trait is low and it is governed by a high number of loci with low to moderate effects. To clarify the biological and genetic background of NBA, genome-wide association studies (GWAS) were performed using 4,012 Large White and Landrace pigs from herdbook and commercial breeding companies in Germany (3), Austria (1) and Switzerland (1). The animals were genotyped with the Illumina PorcineSNP60 BeadChip. Because of population stratifications within and between breeds, clusters were formed using the genetic distances between the populations. Five clusters for each breed were formed and analysed by GWAS approaches. In total, 17 different significant markers affecting NBA were found in regions with known effects on female reproduction. No overlapping significant chromosome areas or QTL between Large White and Landrace breed were detected.

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Citations

Jan 30, 2016·BMC Genetics·Xuemin WangXiaoping Li
Dec 5, 2018·The Plant Genome·Anthony A HansonRobert L Koch
Oct 28, 2019·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Bolívar Samuel Sosa-MadridNoelia Ibáñez-Escriche
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Methods Mentioned

BETA
Chip
MDS

Software Mentioned

R
GRAMMAR
EIGENSTRAT
package
Sscrofa
Ensembl
GenABEL
Ensembl BioMart

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