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:10/18/2014)... of patients with undiagnosed, suspected genetic conditions, a certain ... higher molecular diagnostic yield than traditional molecular diagnostic methods, ... The study is being released to coincide with the ... sequencing, which sequences the protein­coding region of the genome ... in a cell or organism), has been rapidly applied ...
(Date:10/17/2014)... in German . ... drugs. When treating overdoses, doctors are often limited to supportive ... there is a combination of drugs involved. So what can ... his grandmother,s pills? ETH professor Jean-Christophe Leroux from the Institute ... answer to this question. "The task was to develop an ...
(Date:10/16/2014)... thinking on how the bowel lining develops and, in ... cancer starts. , The researchers produced evidence that stem ... that are a feature of the bowel lining, and ... development, a controversial finding as scientists are still divided ... technologies, Dr Chin Wee Tan and Professor Tony Burgess ...
Breaking Biology News(10 mins):Study examines type of exome sequencing and molecular diagnostic yield 2Study examines type of exome sequencing and molecular diagnostic yield 3Emergency aid for overdoses 2Emergency aid for overdoses 3Cryptic clues drive new theory of bowel cancer development 2
... Institute for Medical Research today unveiled a collaboration with ... (MIT) being spearheaded by GlaxoSmithKline (GSK), which aims to ... body,s organs and functions. This initiative is discussed in ... is a powerful collaboration between leaders in the field ...
... from turtles, and scientists who have just sequenced the first ... the shelled creatures, remarkable longevity and ability to survive for ... turtles use to protect their heart and brain from oxygen ... stroke, the researchers said. UCLA conservation biologist ...
... April 9, 2013 Many terrestrial animals are frequently observed ... a lion kill in the Serengeti or a buzzard swooping ... activity in the oceans is especially difficult, and often overlooked ... published in PLOS ONE titled, " White sharks ...
Cached Biology News:Feinstein Institute collaborates with GSK, UPenn, MIT to research body's electrical impulses 2Scientists decode genome of painted turtle, revealing clues to extraordinary adaptations 2Scientists decode genome of painted turtle, revealing clues to extraordinary adaptations 3Great white sharks 2
(Date:10/25/2014)... NEW YORK , Oct. 24, ... formerly Access Pharmaceuticals, Inc. (ACCP), a biopharmaceutical company ... has implemented a 1-for-50 reverse split of its ... on Friday, October 24, 2014. PlasmaTech,s common stock ... CUSIP number 72754H109 and temporary ticker symbol "ACCPD". ...
(Date:10/25/2014)... , October 24, 2014 ... Markets ( http://www.researchandmarkets.com/research/t5t5pd/the_global_market ) has announced the addition ... Nanotubes, Graphene And Other 2-D Nanomaterials " ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,CNTs and graphene are ... known to man, with a performance-per-weight greater ...
(Date:10/22/2014)... (PRWEB) October 21, 2014 The ... the inorganic refrigerants market in Americas with analysis ... TOC of the Americas Inorganic Refrigerants Market report, ... provided. This also provides a glimpse of the ... is supported by various tables and figures. ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 WriteResult, ... services – has been working with a team of ... New Haven Farms Community Farming Collaborative to provide electronic ... solution. The study, which started in May, aims ... that provides participants weekly exposure to and participation in ...
Breaking Biology Technology:PlasmaTech Biopharmaceuticals, Inc. Announces Reverse Stock Split, Ticker Change and Launches New Corporate Website 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3
... 14, 2011 Elsevier, a world-leading provider ... and the Federation of Biochemical Societies (FEBS) announced today ... open access journal. The journal is dedicated to publishing ... both health and disease. , ,In launching this new ...
... CEO of Arteriocyte Cellular Therapies Medical Systems (Arteriocyte) and ... are combining efforts to raise awareness of opportunities for ... They will inspire, celebrate and encourage women to choose ... thrive in STEM fields at a breakfast to be ...
... Amgen (NASDAQ: AMGN ) today announced ... studies were presented at the 53rd Annual Meeting and Exposition ... 2011, in San Diego. Of note, final results from the ... safety and efficacy of Nplate in adults with primary ...
Cached Biology Technology:Elsevier and Federation of Biochemical Societies Launch New Journal: FEBS Open Bio 2Elsevier and Federation of Biochemical Societies Launch New Journal: FEBS Open Bio 3Arteriocyte Takes the Lead in Promoting Building Future Pipeline of Women in STEM Career Fields 2Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 2Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 3Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 4Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 5Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 6Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 7Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 8Amgen Presents Final Results from the Largest Phase 3 Open-Label Study Assessing the Safety and Efficacy of Nplate® (Romiplostim) 9
Madin-Darby bovine kidney (MDBK) cells Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
... Mutation Explorer processes up to 48 lanes, ... Data input can be from either slab ... or primer chemistries. The detection parameters in ... to analyst consistency. We have built ...
Molecular Biological Resources offers bulk quantities of existing protein products. Please see the Chimerx divisions website for existing products and contact lloconne@molbiores.com for pricing....
... Quality ISO 9001:2000 Certified ... All Precedures Validated, SOP's Training ... Process for All Procedures GLP Documentation Upon ... one stop shopping point for all your ...
Biology Products: