Estimation of dam line composition of 3-way crossbred animals using genomic information.

ABSTRACT:

Background

In genomic prediction including data of 3- or 4-way crossbred animals, line composition is usually fitted as a regression on expected line proportions, which are 0.5, 0.25 and 0.25, respectively, for 3-way crossbred animals. However, actual line proportions for the dam lines can vary between  ~ 0.1 and 0.4, and ignoring this variation may affect the genomic estimated breeding values of purebred selection candidates. Our aim was to validate a proposed gold standard to evaluate different approaches for estimating line proportions using simulated data, and to subsequently use this in actual 3-way crossbred broiler data to evaluate several other methods.

Results

Analysis of simulated data confirmed that line proportions computed from assigned breed-origin-of-alleles (

SUBMITTER: Calus MPL 

PROVIDER: S-EPMC9199202 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature