Estimation of heritability of body weight in broilers using pedigree and dense genome-wide SNP data

Antonios Kominakis, Eirini Tarsani, Gerasimos Maniatis, Victor Olori, Andreas Kranis

Research output: Contribution to conferenceAbstractpeer-review

Abstract / Description of output

We used pedigree and dense genome-wide SNP data on 6,598 broilers to obtain heritability estimates for body weight at 35 days of age using two types of genomic relationship matrices, seven minor allele frequency classes and four proportions of numbers of SNPs. We also attempted to partition genomic additive variance into individual autosomal contributions. The pedigree heritability estimate was 0.327 while the maximum genomic heritability (0.29) was attained when the kinship matrices were constructed on common variants and genetic relationships were estimated on identity by state alleles sharing metrics. Genomic heritability
was independent on the number of SNPs used and only 10% of randomly selected SNPs were enough to capture the (co)variance of animals’ additive effects. A strong linear relationship between the proportion of variance explained by each chromosome and chromosome length was observed with longer chromosomes explaining larger proportion(s) of genetic variance.
Original languageEnglish
Publication statusPublished - 11 Feb 2018
Event11th World Congress on Genetics Applied to Livestock Production - Aotea Centre, Auckland, New Zealand
Duration: 11 Feb 201816 Feb 2018

Conference

Conference11th World Congress on Genetics Applied to Livestock Production
Abbreviated titleWCGALP
Country/TerritoryNew Zealand
CityAuckland
Period11/02/1816/02/18

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