HOME >> BIOLOGY >> NEWS
Mouse study suggests mammoth evolutionary change

, some 45 miles northwest of Chicago. That discovery prompted Pergams to get all the museum specimens that were collected in Illinois' Cook and Lake counties.

The researchers used DNA taken not from the nucleus, but from mitochondria, the power plants of the cell. Each cell contains many mitochondria, but only one nucleus.

"If you are working with very degraded, ancient DNA like that from museum skins, you are way ahead using this DNA with lots of copies," said Pergams. Mitochondrial DNA evolves much more rapidly than nuclear DNA, he said, though this evolution was previously thought only to occur over thousands of years.

"We did not expect to find the rapid, consistent and directional change that we did find," he said.

While evidence of such fast change has been cited in studies of fruit flies, this is the first reported study to document such quick evolution in a mammal.

What may account for this change?

"We think it likely that the new gene sequence was either unconditionally advantageous, or that it was advantageous relative to environmental changes caused by humans," Pergams said.

"Settlers may have brought in mice with the favorable gene that were able to out-compete mice with the native variant. A less likely possibility is that mice with these new gene sequences were already present, and that dramatic changes that humans caused in the environment allowed the new gene sequence to be selectively advantageous."

Since all the mice studied were caught in forest preserves and parks, Pergams and Nyberg consider the second alternative unlikely. Future studies should reveal if the favorable gene is in older mouse specimens held by museums in other parts of the country.

In any event, Pergams thinks this research may have broad implications.

"It suggests that humans are a likely cause of such rapid evolution," Pergams said, "and that much of current phylogenetic and phylogeographi
'"/>

Contact: Paul Francuch
francuch@uic.edu
312-996-3457
University of Illinois at Chicago
21-May-2003


Page: 1 2 3

Related biology news :

1. Half-million dollar landmark achieved for the Methuselah Mouse Prize
2. Mouse study shows NPAS3 and NPAS1 genes may be linked to psychosis
3. Mouse brain stem cells capable of converting into blood vessel cells
4. Mouse study yields clue to why liver is less prone to rejection, say Pitt researchers
5. Mouse embryonic germ cells and male gametes created in the lab
6. Mouse, stripped of a key gene, resists diabetes
7. Mouse model of schizophrenia could speed identification of new antipsychotic drugs
8. Mouse study identifies protective mechanism against alcohol-induced embryo toxicity
9. Mouse model offers new explanation for kidney disease and failure
10. Mouse genetic model for spongiform brain diseases
11. Mouse model links alcohol intake to marijuana-like brain compounds

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Mouse study suggests mammoth evolutionary change

(Date:5/11/2015)... , May 11, 2015  Synaptics Incorporated (NASDAQ: ... interface solutions, today announced the appointment of ... Chief Financial Officer, reporting to Rick Bergman ... current Chief Financial Officer, Kathleen Bayless , ... Mr. Ali brings extensive financial management ...
(Date:5/7/2015)... , May 7, 2015 ... sensors, FPC1022 and FPC1035, FPC,s smallest touch fingerprint ... are mainly considered for integration on the backside ... smartphone OEMs increased possibilities to integrate touch fingerprint ... size also improves possibilities for module manufacturers to ...
(Date:4/27/2015)... , Apr. 27, 2015 Profile Solutions, Inc. ... and security systems is pleased to announce that Dr ... a consultant and member of its scientific advisory board. ... known as a thought leader in technology-enhanced learning models. ... Group, and has published studies and books focused on ...
Breaking Biology News(10 mins):Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2FPC Introduces its Smallest Touch Fingerprint Sensors to Date 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4
(Date:5/27/2015)... The Academy of Model Aeronautics Foundation would like to ... Day. The third annual celebration will be August 15, 2015. ... aviation hobby nation-wide and to introduce model flying to the ... clubs to celebrate the hobby and share it with the ... also be a local event at the AMA headquarters in ...
(Date:5/27/2015)... TEL AVIV, Israel , May 27, 2015 /PRNewswire/ ... the first quarter ended March 31, 2015. ... "In the quarter, we continued pre-clinical work to generate ... still in an early stage, we are encouraged by ... in this field as new antibodies which modulate immune ...
(Date:5/27/2015)... , May 27, 2015  CytomX, a ... of cancer, today announced the appointments of ... Cynthia Ladd as senior vice president ... was chief financial officer of Onyx Pharmaceuticals, an ... independent consultant and legal counsel to several leading ...
(Date:5/27/2015)... 2015  Ceres, Inc. (Nasdaq: CERE ), an ... for a genetic sequence derived from soybean, covering uses ... development and plant transformation. The company believes that its ... are the target of a class of commercial herbicides. ... license to the innovation, including an opportunity for exclusivity ...
Breaking Biology Technology:Academy of Model Aeronautics Foundation to host National Model Aviation Day Motorcycle Rally and Family Fest in Muncie, IN 2Academy of Model Aeronautics Foundation to host National Model Aviation Day Motorcycle Rally and Family Fest in Muncie, IN 3Tikcro Technologies Reports First Quarter 2015 Results 2Tikcro Technologies Reports First Quarter 2015 Results 3CytomX Expands Executive Leadership Team 2CytomX Expands Executive Leadership Team 3Ceres Awarded Patent for Innovation in Soybean 2Ceres Awarded Patent for Innovation in Soybean 3
Cached News: