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:5/2/2019)... ... May 01, 2019 , ... uBiome, the ... John Rakow, the Company’s General Counsel, as Interim Chief Executive Officer of uBiome, ... currently on administrative leave. There will also be an independent investigation into uBiome’s ...
(Date:4/25/2019)... ... April 23, 2019 , ... Leak Detection Associates, ... Pharmaceutical, Biotechnology, Medical Device and Food Packaging Industries’ is pleased to announce the ... New Jersey. The new facility was custom designed to meet enhanced manufacturing capabilities ...
(Date:4/25/2019)... Va. (PRWEB) , ... April 24, 2019 , ... NDA ... biostatistician with more than 20 years of experience in the development of drug and ... Expert Consultant. , Prior to joining NDA Partners, Dr. Maddala served as Vice ...
Breaking Biology News(10 mins):
(Date:4/25/2019)... ... April 24, 2019 , ... ... for sales and service organizations, today announced global availability of Inference Studio’s ... and enterprises of all sizes to harness the power of Google’s Contact ...
(Date:4/16/2019)... SAN ANTONIO (PRWEB) , ... April 16, 2019 ... ... biometrics-based human identification systems, applications, and technology, today announced that Bank South Pacific ... through a competitive RFP process. The bank awarded Fulcrum a contract to deliver ...
(Date:4/10/2019)... ... April 10, 2019 , ... ... technology leaders, have locked into multiple agreements to help companies advance their ... regenerative medicine industry, ranging from synthetic biology companies that are gene editing ...
(Date:4/9/2019)... ... 09, 2019 , ... Sonny Bar Lisa, or Sonny for short, is a ... After a series of diagnostics, an MRI was performed which revealed Sonny had ... injury and found that VetStem Regenerative Cell Therapy may be a treatment ...
Breaking Biology Technology:
Cached News: