HOME >> BIOLOGY >> NEWS
Time to rewrite the species rulebook, MSU scientists say

card catalogue guide to an organism's genetic information.

The MSU scientists downloaded the already-sequenced bacteria genomes from a variety of sites on the Internet. Then they did some cross-card catalogue comparisons.

To their surprise, many bacteria that are considered members of the same species by the current mix and match approach, often share as few as 65 percent of their genes. Humans, in comparison, share 75 percent of their genes with fish.

No one's calling for the species rules to be rewritten so that humans are lumped with their distant underwater relatives. And when it comes to bacteria, the authors say, the current species definition appears to be too liberal.

Much of the differences between genetically-similar bacteria appear to be the result of environmental pressures. E. coli bacteria, for instance, exists everywhere from the intestines of warm blooded animals to paper mills. Any new way of tallying up bacteria species should "accommodate the ecological distinctiveness of the organisms," the authors write.

"The point is about the value of a correct understanding of species people expect a species to have certain traits and live in certain habitats," said Tiedje, whose work is also supported by the Michigan Agricultural Experiment Station. "If the species definition is not reasonably predictive of this, then it loses its value. This can be important for pathogen identification, quarantine or biotechnology, for example."

Konstantinidis and Tiedje also noted that even bacteria with genetic card catalogues that were as much as 99 percent similar had enough outward differences to be separate species. This shouldn't come as a shock. Humans and chimpanzees, in comparison, share 98.7 percent of their DNA. But that small difference at the genetic level results in a big difference when it comes to outward appearance and Konstantinidis and Tiedje's work is supported by the Bouyoukos Fellowship Progr
'"/>

Contact: Jim Tiedje
tiedje@msu.edu
517-355-0271
Michigan State University
8-Feb-2005


Page: 1 2 3

Related biology news :

1. New study rewrites evolutionary history of vespid wasps
2. Tiny bones rewrite textbooks
3. West Australian fossil find rewrites land mammal evolution
4. Finding rewrites the evolutionary history of the origin of potatoes
5. Lost forest yields several new species
6. Surprising new species of light-harvesting bacterium discovered in Yellowstone
7. Smithsonians National Zoo researchers use electronic eggs to help save threatened species
8. One species, many genomes
9. Reconstructing the biology of extinct species: A new approach
10. Researchers find 24 species believed new to science in Suriname rainforest
11. Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

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


(Date:6/23/2017)... ARMONK, N.Y. and ITHACA, N.Y. ... IBM ) and Cornell University, a leader in dairy ... combined with bioinformatics designed to help reduce the chances ... breaches. With the onset of this dairy project, Cornell ... the Consortium for Sequencing the Food Supply Chain, a ...
(Date:6/14/2017)... PARIS , June 15, 2017  IBM (NYSE: IBM ... the international tech event dedicated to developing collaboration between startups ... on June 15-17. During the event, nine startups will ... deliver value in various industries. ... in the international market, with a 30 percent increase in ...
(Date:5/23/2017)... 2017  Hunova, the first robotic gym for the rehabilitation and functional ... in Genoa, Italy . The first 30 robots will ... USA . The technology was developed and patented at ... IIT spin-off Movendo Technology thanks to a 10 million euro investment from ... click: ...
Breaking Biology News(10 mins):
(Date:6/23/2017)... ... 23, 2017 , ... Biova, LLC., the leader in water soluble egg membrane ... Dr. Henig will bring a wealth of scientific experience in the food, beverage, nutrition ... and Scientific Officer of four major global companies in the last 4 decades. ...
(Date:6/23/2017)... ... June 23, 2017 , ... ... announced the latest version of LimitLIS®, its rapidly growing Laboratory Information System. , ... user adoption, ensure installation integrity, and provide more customization options. Each of these ...
(Date:6/23/2017)... ... June 23, 2017 , ... Ken Hanson, a medical ... Physik Instrumente USA, have been selected as this year’s recipients of two top awards ... have been invited along with other honorees to accept their awards at a banquet ...
(Date:6/23/2017)... ... June 23, 2017 , ... ... of a redesigned, easier-to-navigate website for all six of their healthcare job ... nurses, dentists, pharmacists, physical and occupational therapists, and biotechnicians, DocCafe.com and the ...
Breaking Biology Technology:
Cached News: