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- W2669389196 abstract "Ireland was the second country to officially implement genomic evaluations in Holstein-Friesian dairy cattle nationally. The vast majority of genotypes in the reference population were obtained from bilateral sharing. Retrospective analysis of the 2-step genomic predictions reveals an average 23% improvement in the accuracy of evaluations across traits. Ireland has now embarked on a national initiative to genotype a large proportion of the national beef herd. Genomic evaluations were undertaken using a 1-step, multi-breed genomic evaluation with the Irish custom genotype panel with >50,000 segregating SNPs on more than 150,000 animals. The cost per genotype, including DNA sampling, postage, DNA extraction, genotyping, genomic evaluations, and tax, is €22. Parentage errors are 17%. The H-inverse matrix was generated with 20% emphasis on the A-matrix; the G-matrix was constructed using the Euclidian distance among animals. A correlation of 0.813 existed between the off-diagonals of the genomic relationship matrix and the respective off-diagonal of the numerator relationship matrix. The validation data set was entire contemporary groups of recently born animals with phenotypes and contained up to 20,000 animals from multiple breeds and crossbreds. The accuracy of genomic predictions of cow-related traits across breeds was 16% greater than predictions based on parental average. Genotypes on almost 10,000 purebred sheep from 5 major breeds are being used to develop genomic predictions. Genotypes available originate from a combination of medium density (c.a. 50,000 SNPs) panels and a custom low density (c.a. 16,000 SNPs) panel. Mean genotype concordance rate per breed imputing from the low to medium density genotypes was 0.984, 0.972, 0.982, 0.969, and 0.989 for Belclare, Charollais, Suffolk, Texel, and Vendeen, respectively. Genotypes from 89 animals were generated using both an Illumina and Affymetrix platform. The mean genotype (allele) concordance rate per SNP for the 48,326 SNPs on both panels was 0.982 (0.991)." @default.
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- W2669389196 date "2016-09-01" @default.
- W2669389196 modified "2023-09-26" @default.
- W2669389196 title "S0116 Genomic evaluations in dairy cattle, beef cattle, and sheep in Ireland" @default.
- W2669389196 doi "https://doi.org/10.2527/jas2016.94supplement48a" @default.
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