Posts

Showing posts from December, 2012

Featured Post

Hereford and Red Angus Heifers Recruited for Genomics Research

The University of Missouri is recruiting 2,500 Hereford heifers and 2,500 Red Angus heifers to participate in a heifer puberty and fertility genomic research project. Heifers should be registered Hereford, registered Red Angus, or commercial Hereford or Red Angus. Hereford x Red Angus crossbred heifers targeted for the Premium Red Baldy Program would also be a good fit for the research project. Producers must be willing to work with a trained veterinarian to collect the following data: ReproductiveTract Scores collected at a pre-breeding exam 30 to 45 days prior to the start of the breeding season. PelvicMeasurements (height and width) collected at the same pre-breeding exam 30 to 45 days prior to the start of the breeding season. Pregnancy Determination Using Ultrasound reporting fetal age in days. Ultrasound will need to occur no later than 90 days after the start of the breeding season. In addition, heifers must have known birth dates and have weights recorded eithe
51 comments
Read more

Lower Prices, More Genotypes

I was really happy to see that 23andMe has lowered prices in an effort to genotype 1,000,000 people . Luckily the  effective population size  (a measure of genetic diversity) is much smaller in cattle breeds, so many fewer animals are needed to design genomic selection programs! But, in an effort to increase the number of animals in its training population with high accuracy EPDs (genetic predictions), the American Hereford Association is offering a cost-sharing program to offset DNA test cost for breeders. If I was a breeder with a bull who meet the AHA's criteria, I would be jumping at the opportunity. (And, if I can scrounge up the money during the holidays, I will be taking advantage of 23andMe's deal!) See message from the AHA below.  High Accuracy Bulls Sought, Cost-Share Option Available During the American Hereford Association (AHA) Board meeting the Board discussed its continued commitment to DNA testing more high accuracy sires. Hereford breeders who
2 comments
Read more

Beef Genomic Selection strategies

This past summer Hereford , Simmental , and Limousin breed associations announced genomic-enhanced EPD programs, following the lead of the Angus Association.  Two strategies have emerged, which I will call the commercial model and the genotype model. The Commercial Model In the commercial model, cattle producers send hair or other tissue samples to their breed association.  The association enters the identification information into its database, and sends the tissue sample to the DNA testing company (typically Pfizer or GeneSeek).  The DNA testing company extracts DNA from the tissue and runs a SNP assay.  These SNP tests contain hundreds or thousands of SNP markers, depending on the company.  The company then computes molecular breeding values (MBVs) based on the animals SNP genotypes.  A MBV is an estimated breeding value based solely on molecular markers.  The company then returns the MBVs to the breed association.  The breed association then uses these MBVs as an indicator tr
Post a Comment
Read more