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!
Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State
How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
30.03.2017 | Physics and Astronomy
30.03.2017 | Studies and Analyses
30.03.2017 | Life Sciences