Navigation Links
Genetic structure of first animal to show evolutionary response to climate change determined
Date:8/24/2010

Scientists at the University of Oregon have determined the fine-scale genetic structure of the first animal to show an evolutionary response to rapid climate change.

They used a high-throughput sequencing technique called Restriction-site Associated DNA (RAD) tagging to make the discovery.

Their results, which focus on the pitcher plant mosquito, Wyeomyia smithii, are published this week in the journal Proceedings of the National Academy of Sciences (PNAS).

RAD tagging is an effective and straightforward way of barcoding sections of genomic material, much as grocery items are coded at the local supermarket, say the scientists.

"This project demonstrates the power of genomics technologies, which can provide new knowledge about the vast array of Earth's species," says Sam Scheiner, program director in the National Science Foundation (NSF)'s Division of Environmental Biology, which funded the research.

"Although this small mosquito has become the poster child for genetic response to climate change," says William Bradshaw, one of the paper's co-authors, "its evolution during post-glacial invasion of North America has been a question."

Using the RAD-Tag approach, the scientists have demonstrated that post-glacial populations of Wyeomyia smithii originated from a southern Appalachian Mountain refugium after recession of the Laurentide Ice Sheet some 22,000 to 19,000 years ago.

Range expansion into the previously glaciated north proceeded in a sequential, ordered wave rather than by a "hit-or-miss" hopscotch process, the biologists found.

With this detailed information, they will be able to determine the genetic mechanism underlying photoperiod response to rapid climate change--responsible for the correct timing of dormancy, migration, development and reproduction in temperate organisms.

The knowledge will act as a template for research on blood-feeding in mosquito vectors of dengue, encephalitis and malaria.

The mosquito in question lives within the water-filled leaves of the purple pitcher plant, Sarracenia purpurea, also known as the side-saddle flower, whose range includes the eastern seaboard of the U.S., the Great Lakes and southeastern Canada.

Sarracenia purpurea is the most common and widely distributed pitcher plant, and is the only member of the genus that inhabits cold temperate climates. Where the purple pitcher plant is found, so, too, is Wyeomyia smithii.

Before the time of Darwin, biologists sought links between apparently related groups of plants and animals with an eye toward understanding the world around us.

Relatedness was first described primarily as similarity in morphological characteristics: broad groupings of organisms were classified into orders, families and genera, much like one describes resemblance among one's extended family.

Early classification of organisms became more refined as developmental, physiological and behavioral observations were incorporated into these broad categories.

With the revelation of gene-based relationships, the search for an increasingly detailed understanding of genetic patterns became a driving force throughout all biological disciplines.

New technologies heralded new advances. "We have now arrived at an era in which genetically similar groups can be clustered quickly and at very low cost to effect a near-endless number of applications," says William Cresko, also a co-author of the PNAS paper.

Researchers can accurately describe genome-wide variation to shed light on evolution at the population level, to predict patterns of invasion of species during rapid climate change, and to correlate gene-based illnesses with susceptible human populations on a local or worldwide scale.

"The RAD-Tag protocol has increased the resolution of genetic relatedness among populations by 100-fold over previous molecular approaches," says Bradshaw.

"Along with the ability to illustrate the fine-scale phylogeographic patterns in species with few or no prior genomic resources," he says, "this technique will have applications in fields from ecology and evolution to human behavior and medicine."


'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Related biology news :

1. Rare genetic disorder gives clues to autism, epilepsy, mental retardation
2. Genetic Engineering & Biotechnology News reports on growing role of molecular diagnostics
3. Study finds genetic variant plays role in cleft lip
4. Genetic finding implicates innate immune system in major cause of blindness
5. American College of Medical Genetics receives $13.5M NIH contract
6. Clue to genetic cause of fatal birth defect
7. Can genetic information be controlled by light?
8. The American Society of Human Genetics hosts 58th Annual Meeting in Philadelphia
9. Modern genetics vs. ancient frog-killing fungus
10. Genetic based human diseases are an ancient evolutionary legacy
11. Genetic evidence for avian influenza movement from Asia to North America via wild birds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic structure of first animal to show evolutionary response to climate change determined
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of ... the latest premium product recently added to the range of products distributed by Ampronix. ... ... ... Medical Display- Ampronix News ...
(Date:5/3/2016)... VILNIUS, Lithuania , May 3, 2016 /PRNewswire/ ... today released the MegaMatcher Automated Biometric Identification ... deployment of large-scale multi-biometric projects. MegaMatcher ABIS can ... and accuracy using any combination of fingerprint, face ... of MegaMatcher SDK and MegaMatcher ...
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... 2016 , ... Supplyframe, the Industry Network for electronics hardware ... . Located in Pasadena, Calif., the Design Lab’s mission is to bring together ... built and brought to market. , The Design Lab is Supplyframe’s physical representation ...
(Date:6/23/2016)... 2016  Blueprint Bio, a company dedicated to identifying, ... community, has closed its Series A funding round, according ... "We have received a commitment from Forentis Fund ... to meet our current goals," stated Matthew Nunez ... to complete validation on the current projects in our ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), ... free webinar on Performing Quality Investigations: Getting to Root Cause. ... no charge. , Incomplete investigations are still a major concern to the Regulatory ...
(Date:6/22/2016)... , June 22, 2016 Cell ... will allow them to produce up to one ... one lot within one week. These high-quality, consistent ... laboriously preparing cells and spend more time doing ... through a proprietary, high-volume manufacturing process that produces ...
Breaking Biology Technology: