Dairy Genetics

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Increased Profits from Higher Lactation Persistency

Source: Canadian Dairy Network Average lactation yields have steadily increased year after year. An observation at Canadian Dairy Network (CDN) is that the typical lactation curve has also gradually become flatter over time.  Basically, there are various ways that a cow can achieve high lactation yields. One may reach a very high peak yield early

Canada’s ten thousand cows genome project

Source: Dairy Research Cluster, Dairy Farmers of Canada Principal Investigator: Dr. Flavio Schenkel University of Guelph, Guelph, Ontario Collaborators: F. Miglior, (University of Guelph), M. Sargolzaei (L’Alliance Boviteq) Genomic selection has been successfully implemented in Holstein cattle and other dairy breeds in Canada, substantially increasing accuracy of genetic evaluation of young bulls, heifers and cows. Genomic predictions


Source: U.N.’s Food and Agriculture Organization (FAO) news release A new FAO database launched today will help countries to better monitor, survey and effectively manage their animal genetic resources, allowing for early warning of the threat of extinction. The Domestic Animal Diversity Information System (DAD-IS) is the most complete source of global information on animal

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A comparison of different algorithms for phasing haplotypes using Holstein cattle genotypes and pedigree data

Source: Journal of Dairy Science, YounesMiar*†MehdiSargolzaei†‡Flavio S.Schenkel† ABSTRACT Phasing genotypes to haplotypes is becoming increasingly important due to its applications in the study of diseases, population and evolutionary genetics, imputation, and so on. Several studies have focused on the development of computational methods that infer haplotype phase from population genotype data. The aim of this study

Genetic Gain Before and After Genomics

Source: Canadian Dairy Network You’ve likely heard the statement: “Genomics has doubled the rate of genetic progress”. In this article, we find out if this claim is true by looking at genetic gain for indexes and individual traits before and after the implementation of genomic evaluations. Female Genetic Trend for LPI and Pro$ Figure 1

Get ‘Em Bred and Keep ‘Em

Source: Select Sire, Mel DeJarnette, director of technical research, Select Sires Inc. A.I. breeding problems can be classified into two fairly broad categories: fertilization failure and embryonic death. Most of my articles focus on semen handling, heat detection and estrous synchronization to improve fertilization rates. However, research suggests that with normal semen quality and appropriate timing

Investing in New Markets for Canadian Livestock Genetics

Source: Agriculture and Agri-Food Canada More Canadian livestock will be raised outside of Canada using prized Canadian genetics. Farmers around the world demand Canada’s superior livestock breeds so they can raise cows and goats that produce more milk, and sheep, which produce more meat, for example. Budget 2017 identifies agriculture as a key growth industry,

Predict future production using average daily gain

Source: Alta Genetics, Chrissy Meyer Genomic testing is a popular way to rank heifers as part of a strategic breeding plan. But it’s not the only way. If you’re looking to not only maximize genetic progress, but also future profit, there might be alternative methods to decide which heifers to cull and which to keep. ADG

Breed Canadian and Benefit from International Exposure

Source: Canadian Dairy Network There are many advantages to genotyping heifers as part of an overall herd management program including improved decisions for selection and mating. An added benefit lies in the potential to create animals of interest genetically for both domestic and foreign markets. When marketing animals domestically, GLPI or Pro$ are the indexes

Feed restriction before calving negatively affects fertility in dairy cattle

Source: Alberta Agriculture and Forestry, www.agriculture.alberta.ca/livestockresearch Negative energy balance post-calving leads to fertility problems in dairy cows During the transition from late pregnancy to lactation, most dairy cows decrease the amount of feed they consume. At the same time, their energy requirements increase, leading to a period of negative energy balance which may hinder future fertility

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