The findings, published in two reports in the journal Science today, will have a profound impact on Australia’s livestock industry.
CSIRO scientists were among the 300 researchers from 25 countries involved in the six-year Bovine Genome Sequencing Project designed to sequence, annotate and analyse the genome of a female Hereford cow called L1 Dominette.
The scientists discovered that the bovine genome contains 2,870 billion DNA building blocks, encoding a minimum of 22,000 genes. Of major interest to scientists are the differences in the organisation of the genes involved in lactation, reproduction, digestion and metabolism in cows compared to other mammals.
One of the lead authors of the report on the project’s latest findings, CSIRO Livestock Industries researcher Dr Ross Tellam said the bovine genome has about 14,000 genes which are common to all mammals and these constitute the ‘engine room’ of mammalian biology.
“The team found that cows share about 80 per cent of their genes with humans, also providing us with a better understanding of the human genome,” Dr Tellam said.
“One of the surprises in the analysis was that cow and human proteins have more in common than mouse and human proteins, yet it is the mouse that is often used in medical research as a model of human disease conditions.”
Dr Tellam said the research provides an insight into the unique biology and evolution of ruminant animals and helps explain why they have been so successful as a species.
One of the major findings was that the cow has significant rearrangements in many of its immune genes and presumably an enhanced natural ability to defend itself from disease.
“This may be an evolutionary response to an increased risk of opportunistic infections at mucosal surfaces caused by the large number of bacteria and fungi carried in the rumen (the largest of the four compartments that make up the bovine stomach),” Dr Tellam said.
“The second possible explanation is that ruminants and cows are typically found in very large herds, and in these herds there is a greater propensity for disease transmission, so you need to be better equipped to withstand diseases.”
These new findings will point the way for future research that could result in more sustainable food production.
Dr Tellam said the $US53 million Bovine Genome Sequencing Project – led by the Human Genome Sequencing Centre at Baylor College of Medicine (BCM-HGSC) in Houston, Texas – is an example of major achievements that can only be realised by substantial international scientific cooperation.
Using the complete genome sequence from L1 Dominette, the female Hereford cow, scientists also undertook comparative genome sequencing for six more breeds to look for genetic changes.The resulting bovine HapMap – a literal map of genetic diversity among different populations – is also published in today’s edition of the journal Science.
The implications of the genome project for the beef and dairy industries are enormous.
“The availability of very large numbers of single nucleotide polymorphisms (DNA changes in the genetic blueprint) has allowed the development of gene chips that measure genetic variation in cattle populations and will allow the rapid selective breeding of animals with higher value commercial traits.
“This technology is quickly transforming the dairy genetics industry and has the potential to dramatically alter beef cattle industries as well,” Dr Barendse said.
These new genetic tools may provide a means to select more energy-efficient animals with a smaller environmental footprint, particularly animals that produce less greenhouse gas.
The Bovine Sequencing and Analysis Project was led by Drs Richard Gibbs and George Weinstock, co-directors of the BCM-HGSC, Dr Steven Kappes of the US Department of Agriculture, Dr Christine Elsik of Georgetown University and Dr Ross Tellam of CSIRO Australia.
In addition to CSIRO, major funders of the Project were: the National Human Genome Research Institute, which funded more than half of the project; the U.S. Department of Agriculture's Agricultural Research Service and Cooperative State Research, Education, and Extension Service National Research Initiative; the state of Texas; Genome Canada through Genome British Columbia; The Alberta Science and Research Authority; Agritech Investments Ltd., Dairy Insight, Inc. and AgResearch Ltd., all of New Zealand; the Research Council of Norway; the Kleberg Foundation; and the National, Texas and South Dakota Beef Check-off Funds.
The Bovine HapMap Project was led by Drs Richard Gibbs and Curt Van Tassell of the USDA and Dr Jeremy Taylor of the University of Missouri.
Funding for the Bovine HapMap Project was provided by: American Angus Association, American Hereford Association, American Jersey Cattle Association, AgResearch (New Zealand), Beef CRC and Meat and Livestock Australia for the Australian Brahman Breeders Association, Beefmaster Breeders United, The Brazilian Agricultural Research Corporation (Embrapa), Brown Swiss Association, GENO Breeding and Artificial Insemination Association - Norway, Herd Book/France Limousin Selection, Holstein Association USA, International Atomic Energy Agency - FAO/IAEA Vienna, International Livestock Research Institute – Kenya, Italian Piedmontese Breeders - Parco Tecnologico Padano, Italian Romagnola Society - Università Cattolica del Sacro Cuore, Livestock Improvement Corporation, Meat & Wool New Zealand. North American Limousin Foundation, Red Angus Association of America, The Roslin Institute for UK Guernsey, and Sygen (now Genus).
Lisa Palu | EurekAlert!
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy