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Many of the bulls will be used in the owners' herds during beef breeding season. However, they have the genetic merit to be used in many others as well. A beef bull may only be able to service 20 to 30 head via natural service during the breeding season. He will be able to service many more during the breeding season via artificial insemination.
This page was last edited on 17 October 2012, at 16:44 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
After the Second World War, artificial insemination became common in cattle and pig breeding. As a result of these developments, a limited number of transboundary commercial breeds, such as the Holstein cow and Large White pig , have become very widespread and nowadays increasingly dominate livestock production globally. [ 6 ]
Robertson continued to work on dairy-related research and wider theoretical studies. He did much to introduce widespread use of artificial insemination in dairy cattle, [6] and worked for many years on estimating genetic effects that influence quantitative traits, and he developed what became known as the "secondary theorem of natural selection."
The Military Farms Service were pioneers in the introduction of Artificial Insemination (AI) in cattle in India. The dairy development in the organized sector in India is attributed to Military Farms. 'Project Frieswal', a project to develop a cross-bred cattle has become the world's largest cross-bred cattle breeding programme. [1] [9]
Sperm sorting by flow cytometry is an established technique in veterinary practice, and in the dairy industry most female cows are artificially inseminated with sorted semen to increase the number of female calves (using sperm sorting is less common in other species of farm animals, however artificial insemination is common). [16] Artificial ...
Whereas in the past cattle had multiple functions, modern dairy cow breeding has resulted in specialised Holstein Friesian-type animals that produce large quantities of milk economically. Artificial insemination is widely available to allow farmers to select for the particular traits that suit their circumstances. [58]
This page was last edited on 29 December 2013, at 01:44 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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