Some 90% of all births of cattle and pigs in Norway result from artificial insemination with frozen, or fresh and stored semen. Highly fertile semen fetches a very high price, and improved methods of evaluation of semen quality are therefore desirable for the Norwegian breeding and husbandry organisations Geno (cattle) and Norsvin (pigs).
For her Ph. D. degree, Karin Waterhouse evaluated semen quality in bulls and boars using a newly-developed method called flow cytometry. The introduction of this technology now means that Norwegian pig breeders can store semen at room temperature for up to five days prior to insemination. Previously, the recommended maximum storage time for boar semen was three days. This breakthrough has led to more effective transportation and distribution of boar semen. Less is wasted and production of semen on Sundays is not longer necessary.
The fertility of Norwegian Red (NRF) breeding bulls is very good in comparison to other cattle breeds in Europe and the USA. This good fertility makes it difficult to find a relationship between semen quality and fertility. Waterhouse has succeeded in finding a relationship between sperm DNA quality and fertilising potential of bull semen, meaning that in the future, sperm DNA quality can be used as a basis to reject semen doses and exclude bulls with inferior fertilising potential. The work that Waterhouse has carried out will help maintain the high fertility of NRF breeding bulls and means that farmers can continue to achieve a high level of pregnancy in their cows after artificial insemination.
Both Geno and Norsvin are ISO-certified semen production units, and the use of flow cytometry for evaluation of semen quality will allow for improved documentation of the semen quality of Norwegian breeding boars and bulls. Geno and Norsvin have recently increased their export of semen, and the improved documentation will be a valuable factor in competition with other international breeding and semen companies.
Hege Robberstad | alfa
How much drought can a forest take?
20.01.2017 | University of California - Davis
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
23.01.2017 | Health and Medicine
23.01.2017 | Physics and Astronomy
23.01.2017 | Process Engineering