Use of SNP for Whole Genome Selection in Cattle, Page 2

Please check this link first if you are interested in organic or specialty dairy production.

 

Map Markers

SNPs as Map Markers

SNPs occur about every 700 base pairs in Bos taurus and every 300 base pairs in Bos indicus cattle (The Bovine HapMap Consortium, 2009), which means there is more genetic variation in Bos indicus cattle. Thus, there are around 4 million SNPs in the Bos taurus genome. If time and money were not limiting, one could sequence the …

Use of SNP for Whole Genome Selection in Cattle, Page 3

Please check this link first if you are interested in organic or specialty dairy production.

SNP Evaluation Systems (continued)

SNP Chips

As mentioned earlier, there is a SNP about every 700 base pairs in the Bos taurus genome, and since the genome is about 2.8 billion base pairs in length, there are about 4 million SNPs. There are too many SNPs to deal with all of them practically, so smaller samples of SNPs are used. Specific SNPs can be …

Use of Single Nucleotide Polymorphisms for Whole Genome Selection in Cattle


Author Information

G.E. Seidel, Jr.
Animal Reproduction and Biotechnology Laboratory
Colorado State University

Abstract

Genomic selection using SNPs (single nucleotide polymorphisms) is a powerful new tool for genetic selection. Current SNP profiles for individual animals are generated using a small plastic chip that is diagnostic for up to 50,000 SNPs spaced throughout the bovine genome. Phenotypes, usually averaged over offspring of bulls, are matched with SNP profiles of bulls mathematically so that animals can be ranked for siring desirable phenotypes …

Genetic marker technology and its impact on the dairy industry

Contents


What’s All the Fuss?

Major changes in genetic evaluations of dairy cows don’t come along every day. Producers …

Dairy Cattle Genetics


Introduction

Improvement of dairy herd genetics can affect herd health, longevity, reproductive traits, and many other vital aspects of dairy cattle production. It can also lead to increased milk production, milk quality, and overall animal performance. Efficient sire selection is the primary avenue for an immediate impact on genetics in a dairy cattle operation.

Genetics Videos

 

It’s Sire Summary Time…Zero In on the Information You Really Need

Contents


Introduction

It happens around the middle of February, and then again in May and August. Maybe you’ll see bull lists in magazines, or maybe your semen salesmen show up with an armload of new promotional materials. Either way you’ll know – it’s sire summary time again.

Data for important traits …

Sire Evaluations for Health and Fitness Traits

Contents


Introduction

Dairy …

Do Genetics Determine the System, or Does the System Determine The Genetics?

Contents


Introduction

Genetic improvement programs for dairy cattle are typically carried out on a national or international basis. However, differences in management practices and/or climate conditions exist between countries, as well as between individual farms within a country. Differences in the economic value …

Dairy Crossbreeding: Results from New Research and Information Still Needed

Contents


Results from New Research

Three crossbreeding projects are …

Sire Selection Strategies for Graziers

Introduction

Several questions commonly come up among dairy producers who practice management intensive rotational grazing when the topic of sire selection arises:

Should I use bulls that were tested under confinement feeding conditions?

Should I use bulls from countries where grazing is common, such as New Zealand?

Should I consider crossbreeding? If so, which breeds should I choose?

Hundreds of bulls from a dozen different breeds are at your disposal, and each has predicted transmitting abilities (PTA) for traits such …