|Smith, Timothy - Tim|
|Van Tassell, Curtis - Curt|
Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/23/2007
Publication Date: 1/2/2008
Citation: Matukumalli, L.K., Schnabel, R.D., Lawley, C.T., Sonstegard, T.S., Smith, T.P., Moore, S.S., Taylor, J.F., Van Tassell, C.P. 2008. Characterization of the Cattle HapMap Population using the Illumina Bovine-50K SNP Chip. Plant and Animal Genome Conference. Interpretive Summary:
Technical Abstract: A Bovine 50K Illumina™ iSelect SNP chip (51,386 polymorphic SNP markers) was designed using a combination of publicly available SNPs along with highly informative novel SNPs discovered using a reduced representation and next-generation sequencing technology strategy. A total of 576 animals (426 males and 150 females) representing 27 breeds were genotyped using this platform. These samples include most of the animals genotyped by the Bovine HapMap consortium except for the four out-group Anoa and Water Buffalo animals that we replaced with 18 out-group animals from 6 different species. The primary U.S. dairy and beef breeds, Holstein and Angus, were represented by 64 and 62 animals, respectively, as compared to 24 animals for most of the other breeds. The number of markers with a minor allele frequency in 0.1 intervals between >0 to '0.5 were 9241, 10297, 10709, 10636 and 10503 respectively. This minor allele frequency distribution reflects our achievement of a significant bias in the representation of highly informative SNPs on the chip. The duplicate reproducibility was 99.9991% from two sample replicates. The trio concordance for parent-parent-child relationships was 99.5% with no errors and 99.87% with no more than one error. Similarly the trio concordance of parent-child relationships was 99.35% and 99.74% with no more than one error. The call frequency within the out-group samples ranged from 78.8 – 90%, whereas for the cattle samples the call rates were in the range 93.5 to 94.6%. Analysis of linkage disequilibrium, haplotype sharing and signatures of selection among the various breeds will be presented.