John B. Cole Animal Improvement Programs Laboratory Agricultural Research Service, USDA Beltsville, MD 20705-2350 2014 AIPL Report.

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Presentation transcript:

John B. Cole Animal Improvement Programs Laboratory Agricultural Research Service, USDA Beltsville, MD AIPL Report

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (2) Cole Implementation of new software Paul VanRaden has developed new programs to calculate genetic evaluations. System for the post-processing of these evaluations to simplify the storage and creation of the distribution files is under development. Goal is to have results by September to submit to the Interbull test run.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (3) Cole More SNP for use in genomic evaluation Small increase in accuracy of genomic evaluations achieved by increasing SNP used from 45,195 to 61,013. All 45,195 SNP used previously were retained, and >15,000 SNP were added from the GeneSeek high-density genotyping chip. For Holsteins, the gain in reliability across all traits from the additional SNP averaged 0.7 percentage points.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (4) Cole Acquisition of full-sequence data Arrangements to share full sequence data are being developed. Canada has sequenced 48 bulls Dr. G. Liu of BFGL will contribute 23 Holstein & Jersey bulls. AIPL has sequenced 21 animals and may add over the next 6 mos. Participation in the 1000 Bull Genomes project has been approved by USDA.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (5) Cole Use of full-sequence data Projects using sequence data include detecting causal variants for AH1 and a birth weight QTL on chromosome 18. Paul VanRaden has developed a method of imputing all SNP in the genome from a subset. The combination of SNP genotypes and sequence data may permit imputation of important genetic variants that are not on existing SNP chips.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (6) Cole How many scientists does it take…

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (7) Cole Sequencing successes at AIPL/BFGL APAF1 – Spontaneous abortions in Holstein cattle (Adams et al., 2012) CWC15 – Early embryonic death in Jersey cattle (Sonstegard et al., 2013) Weaver syndrome – Neurological degeneration and death in Brown Swiss cattle (McClure et al., 2013) HH2, HH3, and BH1 – Holstein and Brown Swiss fertility haplotypes (McClure et al., 2014)

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (8) Cole Imputation of recessive conditions Research data on JH1 was incorporated to improve the accuracy of imputation. GeneSeek has begun to send SNP data on single-gene tests. These SNP will provide direct tests for BLAD, DUMPS, citrullinemia, etc. for many animals.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (9) Cole Assisting the CDCB with computing AIPL is collecting usage information to assist the CDCB in determining its computational requirements. Cloud computing may be a good option for providing needed resources. PostgreSQL is being evaluated as a possible replacement for DB2.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (10) Cole Adjusted weights in genomic evaluations The weighting for cow evaluations used to estimate SNP effects has been reduced. The change prevents evaluations for bulls with many genotyped daughters from being distorted by shrinkage of cow evaluations toward birth year means. Resulted in improved regressions of genomic evaluations on future performance and reduced bias.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (11) Cole Mate selection strategies Our NAAB-funded postdoc, Chuanyu Sun, has developed some software tools for mate selection using genomic relationships. He also is working on strategies for use of dominance effects.

National DHIA Annual Meeting, St. Louis, MO, March 12, 2014 (12) Cole Questions?