Navigation Links
Darwin in the genome

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
McGill University

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:
(Date:10/4/2017)... Oct. 4, 2017  GCE Solutions, a global clinical research organization ... document anonymization solution on October 4, 2017. Shadow is designed to ... comply with policy 0070 of the European Medicines Agency (EMA) in ... ... ...
(Date:6/30/2017)... June 30, 2017 Today, American Trucking ... supplier of face and eye tracking software, became ... provider program. "Artificial intelligence and ... to monitor a driver,s attentiveness levels while on ... able to detect fatigue and prevent potential accidents, ...
(Date:5/16/2017)... N.J. , May 16, 2017  Veratad Technologies, ... provider of online age and identity verification solutions, announced ... K(NO)W Identity Conference 2017, May 15 thru May 17, ... Regan Building and International Trade Center. ... the globe and in today,s quickly evolving digital world, ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... 2017 , ... ComplianceOnline’s Medical Device Summit is back for its 4th year. ... San Francisco, CA. The Summit brings together current and former FDA office bearers, regulators, ... government officials from around the world to address key issues in device compliance, quality ...
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , Oct. 11, ... Research, London (ICR) and University of ... SkylineDx,s prognostic tool to risk-stratify patients with multiple myeloma (MM), ... nine . The University of Leeds ... funded by Myeloma UK, and ICR will perform the testing ...
(Date:10/11/2017)... , ... October 11, 2017 , ... ... (FDA) has granted orphan drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer ... treatment of osteosarcoma. SBT-100 is able to cross the cell membrane and bind ...
(Date:10/10/2017)... Philadelphia, PA (PRWEB) , ... October 10, 2017 ... ... University City Science Center’s FirstHand program has won a US2020 STEM Mentoring Award. ... accept the award for Excellence in Volunteer Experience from US2020. , US2020’s mission ...
Breaking Biology Technology: