Navigation Links
Darwin in the genome
Date:4/3/2012

A current controversy raging in evolutionary biology is whether adaptation to new environments is the result of many genes, each of relatively small effect, or just a few genes of large effect. A new study published in Molecular Ecology strongly supports the first "many-small" hypothesis.

McGill University professor Andrew Hendry, from the Department of Biology and the Redpath Museum, and evolutionary geneticists at Basel University in Switzerland, studied how threespine stickleback fish adapted to lake and stream environments in British Columbia, Canada. The authors used cutting-edge genomic methods to test for genetic differences at thousands of positions ("loci") scattered across the stickleback genome. Very large genetic differences between lake and stream stickleback were discovered at more than a dozen of these loci, which is considerably more than expected under the alternative "few-large" hypothesis.

By examining four independently evolved lake-stream population pairs, the researchers were further able to show that increasing divergence between the populations involved genetic differences that were larger and present at more and more loci.

As these results were obtained using new high-resolution genetic methods, it is conceivable that previous perceptions of adaptation as being a genetically simple process are simply the result of a bias resulting from previous lower-resolution genomic methods.

"I suspect that as more and more studies use these methods, the tide of opinion will swerve strongly to the view that adaptation is a complex process that involves many genes spread across diverse places in the genome," says Prof. Hendry.


'/>"/>

Contact: Katherine Gombay
katherine.gombay@mcgill.ca
514-398-2189
McGill University
Source:Eurekalert

Page: 1

Related biology news :

1. GEN joins Charles Darwin 2009 celebration
2. Beyond ooh-ooh, aah-aah-- expert on monkey communication kicks off Darwin series, May 5
3. Darwins legacy in 21st century biology
4. Darwins seminal impact on biology, anthropology, philosophy and psychology
5. 150 years of Darwins landmark book spawns international conference
6. Darwin anniversary heralds new conservation research era for Northern Ireland
7. Why didnt Darwin discover Mendels laws?
8. Darwin in a test tube
9. Why do we choose our mates? Ask Charles Darwin, prof says
10. U Alberta researcher in same group as Darwin and Hawking
11. Journalists invited to Darwin/Chicago 2009 conference Oct. 29-31
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... 30, 2014 NexID Biometrics , ... detection solutions for the biometric authentication industry, has ... revolutionizing online authentication with standards for strong authentication. ... "The decision to join FIDO Alliance stems from ... in use. We believe the FIDO Alliance is ...
(Date:7/30/2014)... help Americans make better decisions about what they eat, ... proposed significant changes to the Nutrition Facts label found ... article in Chemical & Engineering News (C&EN), ... explains the suggested updates and the fight that ... C&EN, points out that while the Nutrition Facts label ...
(Date:7/30/2014)... has been awarded the Scientific Committee on Antarctic ... Research. , SCAR, an inter-disciplinary international science body, ... research in the Antarctic region, and on the ... system. The organisation also provides scientific advice about ... governing the region. , The medal is open ...
Breaking Biology News(10 mins):NexID Biometrics Joins the FIDO Alliance 2
... ARBOR, Mich. It,s a leading cause of death, but no ... major source of health care costs, adding days or weeks to ... But no one fully understands how best to fight it. ... and it,s a major part of the very serious illness called ...
... well known that plants growing under unfavourable conditions are generally ... estimated that in the US, abiotic stress reduces the yield ... example of the effect of stress in this case, ... trees, in which every aspect of their stature, including height, ...
... be standard equipment for most new diesel trucks, buses, ... United States after Jan. 1, 2010. An automotive grade ... stream to "scrub" nitrogen oxide (NOx) from the diesel ... to smog, which causes asthma and respiratory and heart ...
Cached Biology News:Battling bacteria in the blood: Researchers tackle deadly infections 2Battling bacteria in the blood: Researchers tackle deadly infections 3Battling bacteria in the blood: Researchers tackle deadly infections 4The bonsai effect: Wounded plants make jasmonates, inhibiting cell division, stunting growth 2Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 2Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 3Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 4Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 5Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 6Urea tanks on diesel trucks -- that's the law in the United States starting in 2010 7
(Date:7/31/2014)... The global market for molecular diagnostics ... according to a new study by Grand View Research, ... the subsequent introduction of advanced cancer diagnostic technologies are ... the next six years. Moreover, the growing global base ... coupled with disease triggering lifestyle habits such as smoking ...
(Date:7/31/2014)... Miami, Fla. (PRWEB) July 31, 2014 The ... for distribution of its monthly news magazine, Kidney Cancer News. ... have a presence on a website maintained by an international ... noted an immediate increase in viewers.” , This month’s program ... of kidney tumors analyzed in a recent study. Kidney ...
(Date:7/30/2014)... 30, 2014 W. R. Grace ... of the REVELERIS® Prep purification system , ... chromatographers, and other researchers to perform both flash ... unit. , With the REVELERIS® Prep purification system, ... chromatography modes with a simple touch of the ...
(Date:7/30/2014)... 2014 While administrative claims and ... research for a relatively long period of time, ... the use of these ‘big data’ for comparisons ... combining today’s powerful computer technology with the plethora ... data’ holds significant promise for identifying optimal interventions ...
Breaking Biology Technology:Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 2Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 3Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 4Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 5Grace Launches New REVELERIS® Prep Purification System 2Leveraging ‘Big Data’ - Methodological Considerations in Health Services Research, New Webinar Hosted by Xtalks 2
... great promise for applications from microelectronics to power lines ... knew magnets could stop those electrons in their tracks? ... been studying the Aharonov-Bohm effect -- the interaction between ... it relates to carbon nanotubes. While doing so, ...
... 8 Bion Environmental Technologies, Inc. (OTC Bulletin Board: ... on July 14 , hosted by SUNY Oswego ... Center auditorium.  The forum, sought by Bion along with Operation ... Bion,s proposed beef cattle production facility that would be integrated ...
... ... suggestions for effective interactive healthcare marketing at Digital Pharma West. , ... (PRWEB) -- Viscira™, a leading provider ... presentation entitled, “Maximizing Return on Interactive” at the Digital Pharma West (DPW) conference last ...
Cached Biology Technology:Magnets trump metallics 2Bion Confirms Participation in SUNY Oswego's Forum 2Bion Confirms Participation in SUNY Oswego's Forum 3Bion Confirms Participation in SUNY Oswego's Forum 4Viscira Delivers Key Presentation to Pharmaceutical Marketing Professionals at Leading Digital Industry Conference 2
Anti-Goat HRP-DAB Cell & Tissue Staining Kit...
... The Light Diagnostics Cytomegalovirus (CMV) pp65 ... the qualitative identification of lower matrix protein ... leukocytes. Kit Components: ... 5122) One bottle containing 220 mL of ...
... The CultureWell cell culture systems ... preparing cultured cells for staining ... medical-grade silicone gaskets preassembled with ... culture plates. The entire system ...
nuclear cap binding protein subunit 1, 80kDa, mRNA...
Biology Products: