HOME >> BIOLOGY >> NEWS
Sticklebacks reveal secrets to evolutionary change in Stanford study

STANFORD, Calif. - Whales, snakes and some lizards and fish all lost their hind limbs (or fins) as they evolved from their four-legged ancestors. New data from the Stanford University School of Medicine suggest that at least in some fish, alterations in a single gene bring about this evolutionary change.

"People have been interested in limbs for a long time because they show such variability in different animals," said David Kingsley, PhD, professor of developmental biology, who led the work. "The debate has been how many genes account for these differences."

The study, published in the April 15 issue of Nature, took advantage of a unique species of fish called the threespine stickleback. Pockets of sticklebacks were isolated by geologic changes at the end of the Ice Age 10,000 years ago, with each newly separated population evolving in response to local ecological conditions. A handful of the thousands of populations around the world lost their hind fins and associated spines, probably to avoid local predators that grabbed the fish by those spines.

Kingsley, who is also an associate investigator with the Howard Hughes Medical Institute, said the debate over how limbs evolve has been stymied because most animals that evolved to have fewer or altered limbs also have a host of other genetic changes, making it hard for scientists to tease out the number and location of genetic changes most important for altering the limb. Sticklebacks, with their recent divergence into many distinct populations, present an opportunity to study recent limb evolution.

The group looked at two populations of freshwater threespine sticklebacks that had lost their hind fins. Working with senior co-author Dolph Schulter of the University of British Columbia, the group crossbred a population of Vancouver freshwater sticklebacks with their four-finned marine relatives. All the resulting offspring had hind fins. These four-finned offspring, which had o
'"/>

Contact: Amy Adams
amyadams@stanford.edu
650-723-3900
Stanford University Medical Center
14-Apr-2004


Page: 1 2 3

Related biology news :

1. DNA lends scientists a hand, revealing new chemical reactions
2. Award winning researchers reveal potential new role for Glivec
3. Hidden diversity: DNA barcoding reveals a common butterfly is actually 10 different species
4. Anthrax enzyme images reveal secrets of antibiotic resistance, suggest new drug design
5. Brown research reveals key insight into memory-making
6. Study reveals why eyes in some paintings seem to follow viewers
7. Fossil genes reveal how life sheds form and function
8. New dye directly reveals activated proteins in living cells
9. Israeli scientists reveal the plan of a key cellular machine
10. Cells gatekeeper for ammonia revealed in unprecedented detail
11. Fossils reveal direct link between global warming and genetic diversity in wildlife

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/28/2020)... and CAMBRIDGE, Mass. (PRWEB) , ... January 28, ... ... complex problems for life sciences companies and government agencies, announced that the firm ... hubs in the country. Tunnell’s Cambridge office will be in the Cambridge Innovation ...
(Date:1/27/2020)... ... 2020 , ... Cytonus Therapeutics Inc. today announced the appointment ... former senior management consultant at McKinsey & Company who holds three Harvard degrees. ... , “Chris Thorne has exceptional business acumen with a proven track record ...
(Date:1/24/2020)... ... January 24, 2020 , ... Worldwide Business with ... President Dr. Stanley Stanbridge and Vice President of Sales and Marketing Jeff Maier to ... Network as sponsored content on Sunday, Jan. 26, 2020 at 5:30 p.m. EST and ...
Breaking Biology News(10 mins):
(Date:1/27/2020)... ... January 27, 2020 , ... ... has secured financing from strategic investors led by Halma plc , a ... investors Sonion, TDF Ventures, GII LLC, and WSJ Joshua Fund. A representative from ...
(Date:1/23/2020)... ... January 22, 2020 , ... Ideal Implant CEO and President ... two recent North American investor forums specializing in medical advancements. New technology was ... Diagnostics Forum on November 21, 2019 in New York City, and the Aesthetic ...
(Date:1/22/2020)... ... 2020 , ... QCDx , a private biotech company that has developed ... announced the sale of the proprietary RareScope™ instrument to the Carole and Ray Neag ... cancer research. , “The RareScope can detect and isolate intact and live Circulating Tumor ...
(Date:1/8/2020)... ... 2020 , ... Anomet Products has introduced new ... in harsh environments inside or outside of the human body. , ... to achieve specific properties such as corrosion-resistance, biocompatibility, or operation at temperatures from ...
Breaking Biology Technology:
Cached News: