Dairy Cattle Breed Associations

Minhota breed cattle: Carcass characterization

Across breed multi-trait random regression genomic predictions in the Nordic Red dairy cattle.

The current study evaluates reliability of genomic predictions in selection candidates using multi-trait random regression model, which accounts for interactions between marker effects and breed of origin in the Nordic Red dairy cattle (RDC). The population structure of the RDC is admixed. Data consisted of individual animal breed proportions calculated from the full pedigree, deregressed proof...

Genomic evaluation, breed identification, and discovery of a haplotype affecting fertility for Ayrshire dairy cattle.

Genomic evaluations of dairy cattle in the United States have been available for Brown Swiss, Holsteins, and Jerseys since 2009. As of January 2013, 1,023 Ayrshires had genotypes in the North American database. Evaluation accuracy was assessed using genomic evaluations based on 646 bulls with 2008 traditional evaluations to predict daughter performance of up to 180 bulls in 2012. Mean gain in r...

The differences in heat stress resistance due to dairy cattle breed

Considering the rapid climate changes worldwide, with the purpose to reduce financial losses for dairy farmers and enable a more sustainable farming as well, there is an increasing necessity to implement breeding values for heat resistance in breeding strategies. The estimation of breeding values requires a determination of temperature-humidity index (THI) threshold value. Therefore, the object...

Across- and Within-breed Imputation across Several Genotyping Densities in Dairy and Beef Cattle

Illumina high density genotypes (777,962 SNPs) were available on 3,122 dairy and beef bulls. Animals were partitioned into either a calibration or validation dataset to test the accuracy of imputation. All animals, irrespective of breed, born after 2005 (n=698) were assumed to represent the validation bulls. The high density genotypes were masked in the validation animals to represent a low den...