Dairy Genetics

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Beta Casein, A2 Milk and Genetics

Source: Canadian Dairy Network How lucky we are to be involved in an industry that produces something unparalleled in its nutrition and processing diversity? Milk is often touted as ‘nature’s most perfect food’, and with good reason thanks to its combination of essential nutrients, proteins and healthy fats. In recent years, a specific milk protein,

Genome-wide association for milk production and female fertility traits in Canadian dairy Holstein cattle

Source: BioMed Central Shadi Nayeri, Mehdi Sargolzaei, Mohammed K. Abo-Ismail, Natalie May, Stephen P. Miller, Flavio Schenkel, Stephen S. Moore and Paul Stothard Abstract Background Genome-wide association studies (GWAS) are a powerful tool for detecting genomic regions explaining variation in phenotype. The objectives of the present study were to identify or refine the positions of genomic regions affecting milk production, milk components and fertility traits in Canadian Holstein cattle, and to use these

Controlled Breeding Programs for Heifers

Source: Alberta Agriculture and Forestry Kira Macmillan and Marcos G. Colazo Livestock Research Section, Alberta Agriculture and Forestry, Edmonton, Alberta, Canada. E-mail: marcos.colazo@gov.ab.ca Introduction Improving the reproductive efficiency of replacement heifers is important, as heifers represent a large cost to the farm before they become productive, i.e. calve. Fixed time artificial insemination (FTAI) protocols have

Gestation length added as new trait

Source: Alta Genetics The Council on Dairy Cattle Breeding (CDCB) is adding gestation length as a new trait to be released with August 2017 proofs. Gestation length can be most useful as a genetic tool for herds that implement seasonal calving. These herds will have the option of choosing service sires with shorter gestations for

Mighty Good Advice For Your Heifers

Source: Select Sires, Mel DeJarnette For any animal breeding operation with progressive genetic goals, the youngest animals in the herd should be the most valuable animals. This is especially true for the dairy or beef producer who is currently using artificial insemination. Unfortunately, in many dairy operations, the heifers tend to be overlooked and undervalued. Because

A Step Towards Genetic Improvement for Hoof Health

Source: Canadian Dairy Network What are the major health issues in your lactating herd? Chances are good your answer includes some or all of the following: mastitis, reproductive issues and lameness. Great strides have been made in terms of genetic selection for reduced somatic cell, improved resistance to clinical mastitis and higher daughter fertility. But

Unsaturated fatty acids enhance early embryonic development in dairy cows

Source: Alberta Agriculture and Forestry Feeding unsaturated fatty acids has been shown to improve reproduction in dairy cows by decreasing pregnancy losses and increasing conception rates. However, previous studies did not focus on their effects on embryonic development. Two major sources of unsaturated fatty acids are flaxseed and sunflower seeds. Flaxseed is rich in alpha-linolenic

Polled genetics – examine the pros and cons

Source: Alta, Chrissy Meyer The polled gene in dairy cattle is dominant over the horned gene Polled dairy cattle trace back as far as pedigree records have been kept. The polled gene in dairy cattle is dominant over the horned gene. Yet horned cattle are still much more prevalent in the global dairy population because

Does Filtering Really Help Achieve Your Breeding Goals?

It can be argued that sire selection is the single most important element of a successful breeding program. Of course, it goes without saying that you must first have established the breeding objectives for your herd. This is where the two national genetic selection indexes, LPI and Pro$, have a critical role to play.  Canadian

Animal Industry Market Information System (AIMIS) dairy genetics database

Dairy Animal Registrations Welcome to the Agricultural Industry Market Information System (AIMIS) dairy genetics database. This section houses reports on the Number of Registrations of Dairy Cows and Goats registered as Purebred or Non-Purebred in accordance with the Animal Pedigree Act. This section also provides animal registration information from Artificial Insemination Sires as well as

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