Navigation Links
Remote sheep population resists genetic drift

A whimsical attempt to establish a herd of mouflon for sport hunting on a remote island in the Indian Ocean 50 years ago has inadvertently created a laboratory for genetic researchers and led to a surprising discovery.

A mouflon population, bred over dozens of generations from a single male and female pair transplanted to Haute Island from a Parisian zoo, has maintained the genetic diversity of its founding parents. This finding challenges the widely accepted theory of genetic drift, which states the genetic diversity of an inbred population will decrease over time.

"What is amazing is that models of genetic drift predict the genetic diversity of these animals should have been lost over time, but we've found that it has been maintained," said Dr. David Coltman, an evolutionary geneticist at the University of Alberta.

"We think this has happened because natural selection is more important to the evolutionary process than is commonly believed," he added.

Genetic diversity refers to the total amount of possible gene combinations that a mating male and female couple can produce. Scientists believe greater genetic diversity corresponds with greater odds of survival and successful reproduction due to a greater variety of genetic tools an organism has to combat the forces, such as diseases, that may otherwise weaken or kill it.

Coltman believes the harsh environment of Haute Island, with its cold winters, scarce resources and grass-borne parasites, has "kept the mouflon on their genetic toes, so to speak."

He argues that the extreme conditions on the craggy, windswept island have prevented genetic drift due to the premium advantage the more genetically diverse mouflon on the island hold over their less genetically diverse cousins.

"This herd certainly challenges our understanding of genetic drift," he said. "And I think it shows us the power of natural selection."

Coltman and his colleagues, i
'"/>

Source:University of Alberta


Page: 1 2

Related biology news :

1. Remote control flies? Fly behavior controlled by laser light
2. Israeli scientists successfully transplant frozen-thawed ovaries in sheep
3. A wolf in sheeps clothing: Plague bacteria reveal one of their virulence tricks
4. Researchers discover that sheep need retroviruses for reproduction
5. Measuring the impact of post-genomics on Mediterranean populations
6. A new study examines how shared pathogens affect host populations
7. Are rice and wheat behind Chinas population boom?
8. Ocean climate predicts elk population in Canadian Rockies
9. Environmental lessons from tsunami as worlds coastal population doubles
10. Updated data on novel HPV vaccine confirms efficacy in large population
11. New discovery: Molecular variation in one gene affects the growth of natural populations
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Remote sheep population resists genetic drift

(Date:7/31/2014)... study (HPV-023; NCT00518336) shows the sustained efficacy, ... virus (HPV) vaccine Cervarix. Women vaccinated with ... more than nine years, and vaccine efficacy ... is the longest follow-up report for a ... for the full paper. , HPV ...
(Date:7/31/2014)... from Spain, France, and the U.S. has discovered ... oldest definitive member of the tribe Omaliini that ... and description were made possible through the use ... which allows the detailed study of otherwise invisible ... described in the journal Annals of the ...
(Date:7/31/2014)... make a rational choice to be liberal or conservative? ... a matter of genetics?, Two political scientists from the ... say that neither conscious decision-making nor parental upbringing fully ... right. , A growing body of evidence shows that ... of political differences, the researchers say in the latest ...
Breaking Biology News(10 mins):Sustained efficacy, immunogenicity, and safety for GlaxoSmithKline's HPV vaccine 2Sustained efficacy, immunogenicity, and safety for GlaxoSmithKline's HPV vaccine 3Scientists find growing consensus: Political attitudes derive from body and mind 2
... the driving force behind key discoveries in medicine and ... genome provides important markers and guidelines for medical diagnostics ... been the cost and speed of obtaining highly accurate ... the last 10 years, most current high-throughput sequencing instruments ...
... - It,s called mile-a-minute weed or "forest killer." ... spreads quickly, covering crops, smothering trees and rapidly altering ... are spearheading a four-year research project that will explore ... vulnerable to rapid environmental change, such as an invasion ...
... scab could help create new, environmentally-benign biocatalysts with the potential ... Chemists at the University of Warwick in the UK, ... have reported in the journal Nature Chemical Biology ... scabies that catalyses an aromatic nitration reaction. TxtE, ...
Cached Biology News:Columbia researchers report novel approach for single molecule electronic DNA sequencing 2Columbia researchers report novel approach for single molecule electronic DNA sequencing 3'Forest killer' plant study explores rapid environmental change factors 2'Forest killer' plant study explores rapid environmental change factors 3Remarkable enzyme points the way to reducing nitric acid use in industry 2
(Date:7/31/2014)... Today BioSpace , the leading life sciences employment and news website, ... sciences community in Illinois , Indiana ... Michigan , Minnesota , Missouri ... and Wisconsin . BioMidwest is a leader ... on BioSpace originating in this region in 2013. The life sciences sector ...
(Date:7/31/2014)... reason people over 60 are not donor candidates for ... with time, making the elderly prone to life-threatening infection ... team now has discovered a reason why. , "We ... of blood-forming cells to maintain blood production over time ... that could be restored for rejuvenation therapies," said Emmanuelle ...
(Date:7/31/2014)... even the entire body to visualize long-range connections between ... a long-time dream of biologists. A study published by ... Cell has now made that dream a ... and human tissue biopsies transparent, while keeping the cellular ... way for a better understanding of brain-body interactions, more ...
(Date:7/31/2014)... BLOOMINGTON, Ind. -- Chemists at Indiana University Bloomington ... in bricks-and-mortar fashion, a development with potential value ... as field-effect transistors and photovoltaic cells. , Their ... 3D Crystalline Solids and 2D Self-Assembled Crystals," has ... a journal of the Royal Society of Chemistry. ...
Breaking Biology Technology:Midwest Biotech Leaders Featured On BioSpace Map 2Key to aging immune system is discovered 2See-through organs and bodies will accelerate biomedical discoveries 2Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 2Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 3
... 2008 FINANCIAL RESULTS Confirmation of Annual and ... /PRNewswire-FirstCall/ - Angiotech Pharmaceuticals,Inc. (NASDAQ: ANPI , TSX: ... host a conference call discussing its,financial results for the ... 2008 at 11:00 AM ET (8:00 AM Pacific)., ...
... Calif., Oct. 28 Beckman,Coulter, Inc. (NYSE: ... new sole,source agreements with Adventist Health to provide ... valued at approximately $36 million over,six years. Adventist ... facilities in California, Hawaii, Oregon, and Washington., ...
... for Continued Long-Term Growth, Conference Call and Webcast to Be Held Today at 5:00 p.m. ET (22:00 CET), ... Q3 2008 ... 190.5% increase Naglazyme Net Product ... 56.3% increase Aldurazyme Net Sales by Genzyme ...
Cached Biology Technology:Notice of conference call and webcast 2Beckman Coulter Signs Agreements with Adventist Health; Broad Product Offering Enhances Delivery of Quality Patient Care 2BioMarin Announces Third Quarter 2008 Financial Results 2BioMarin Announces Third Quarter 2008 Financial Results 3BioMarin Announces Third Quarter 2008 Financial Results 4BioMarin Announces Third Quarter 2008 Financial Results 5BioMarin Announces Third Quarter 2008 Financial Results 6BioMarin Announces Third Quarter 2008 Financial Results 7BioMarin Announces Third Quarter 2008 Financial Results 8BioMarin Announces Third Quarter 2008 Financial Results 9BioMarin Announces Third Quarter 2008 Financial Results 10BioMarin Announces Third Quarter 2008 Financial Results 11BioMarin Announces Third Quarter 2008 Financial Results 12
albumin from bovine serum (BSA), Texas Red® conjugate...
Edited by P.J. Delves (1997) An up-to-date review of antibody-raising technologies, this volume provides researchers with immediate access to the protocols they require every day....
... 5 ml Dynabeads® (4.5 ... BerEP4 against the human epithelial ... molecule). Also available in ... 10e7 MNC in 1 ml ...
Superior homology search software - in all the flavours of blast, with increased sensitivity and speed. Free windows version for academic use....
Biology Products: