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DSEC October 2009
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Percent correctly called genotypes, linkages, and paternity by breed and group.
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Haplotype probability with 100 markers per chromosome
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Haplotype probability with 12 markers per chromosome
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Gains from tracing true or estimated parent haplotypes using 12 markers per chromosome as compared to genotyping progeny for 1000 markers per chromosome.
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Benefits of Haplotyping
Gains in reliability above PA with haplotyping and 384 markers: 80% of the 50K gains if genotypes of both parents are available Nearly as good for all traits and breeds Without haplotyping: 30-40% of gain for Net Merit Less for other traits and breeds
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Regressions and squared correlations (x100) using August 2006 data to predict August 2009, and observed reliability gains as compared to November 2004 cutoff. Parent Avg Genomic prediction REL Gain Trait REL R2 Bias Regression Nov 2004 Aug 2006 Net merit 35 14 27 -25 .81 59 21 23 Milk 39 18 41 -54 .89 70 32 Fat 16 42 -4 .91 75 36 Protein 19 -1 .86 67 20 28 Fat % 62 .00 .96 92 47 54 Protein % 58 80 37 PL 33 31 -1.0 1.08 66 SCS 15 30 -.01 .80 61 25 DPR -.1 1.07 53
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Lower and Higher Density Chips
384 marker low-cost assay 96 parentage selected for Net Merit $ Available in fall 2009 600,000 marker chip Expected to be available in 2010 3 billion full sequence of individual Blackstar (most related to HO breed) Already done by USDA Bovine Functional Genomics Lab
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Best Chromosome 1 Co-Op Boliver Lisha
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Best Chromosome 2 Kellercrest Earnit Hank
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Best Chromosome 3 Wesselcrest Sidney Aric
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Best Chromosomes 1-30 Genomics Extraordinaire, +3148 Net Merit $
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Embryo Selection In vitro embryos from heifers before puberty
Further reduce generation interval Frozen, genotyped embryo market Cost of genotyping < cost of ET Could replace AI if accuracy high Very rapid generation turnover Velogenetics not yet feasible
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