PPT-Genomic Selection in Multi-Breed Dairy Cattle Populations

John B Cole Animal Genomics and Improvement Laboratory Agricultural Research Service USDA Beltsville MD 207052350 Introduction Genomic selection rapidly adopted for purebred cattle Hayes et al 2009 . Kail Wilkerson and MarkAnne Geary. Angus cattle . . Angus is a beef breed. They came from Scotland. Ranchers like them in the snowy places because they have black bags so they don’t get burnt.. Beefalo . Part 1. Objectives. Define terms used to describe dairy animals, and identify the parts of a dairy animal.. Compare and contrast the major breeds of dairy cattle.. Recognize the advantages and disadvantages of dairy production.. Animal . Unit. Ms. . Skinner. Vocabulary . Alveoli. —the part of the udder that manufactures milk. . Bos. . indicus. —humped cattle found in tropical countries. . Bos. . taurus. —domestic cattle originating from the Aurochs or Celtic Shorthorn.. Chapter 9. W. Stephen Damron. Introduction to Animal Science:. Global, Biological, Social, and Industry Perspectives. Learning Objectives. After studying this chapter, you should be able to:. define . Selection and Sustainable Cattle Production: Are the Incentives Aligned. ?. Ellen Goddard. Albert . Boaitey. , Anahita . Matin. , Violet . Muringai. , . Getu. . Hailu. (U. of Guelph). Canadian Cattle . Ms. Sauceda. From Scotland. Medium size . Medium to dark red and white. Hardy and good grazers with good udders. Average Lactation is 305 days. 14,534 lbs. milk in one year. ARYSHIRE. BROWN SWISS. From Switzerland (Swiss Alps). Abstract #461. Background - Crossbreeding. Harris and Johnson (2010) . used multibreed relationship matrix to obtain GEBVs in NZL. Olson et al (2010) . estimated MT multi-breed SNP effects and genomic breed composition. Genotypes are Useful for More Than Genomic Evaluation Uses for genotypes Ancestor discovery within breeds Inheritance tracking for chromosomes Mating programs Genomic inbreeding, dominance Fertility defects – haplotypes and QTLs (Abstract 58). J.B. Cole. 1,*. K.L. Parker Gaddis. 2. , C. Willard. 1. , D.J. Null. 1. , C. Maltecca. 3. , and J.S. Clay. 4. 1 . Animal Genomics and Improvement Laboratory, ARS, USDA, Beltsville, MD, USA. George Wiggans, CDCB Technical Advisor. Highlights of U.S. system. Over half a million animals genotyped in 2016. 67% of AI breedings to genomic bulls. Genomic relationship between genotyped cows and marketed bulls available. Dairy Cattle. 9 million cows in US. Attempt to have a calf born every year. Replaced after 2 or 3 years of milking. Bred via AI. Bull semen collected several times/week. Diluted and frozen. Popular bulls have 10,000+ progeny. - Diagram courtesy of the Holstein Association USA, Inc. Figure 2. Dairy Cow Score Card Dairy Cow Unified Score Card *All traits are listed in priority order. 1. Frame 15% The skeletal parts of t Isaac Haagen. Maci Mueller. Council on Dairy Cattle Breeding. Objective. Determine the people, locations, and scope. . of dairy genetic research over the last 5 years. The Database. Methods. Date range: 2012 - 2017 (August). biology – lessons from dairy cattle breeding. Dairy Cattle. 9 million cows in US. Attempt to have a calf born every year. Replaced after 2 or 3 years of milking. Bred via AI. Bull semen collected several times/week. Diluted and frozen.