HOME >> BIOLOGY >> NEWS
Parting genomes: UA biologists discover seeds of speciation

A University of Arizona graduate student may be the first eyewitness to the birth of a new species. Her new findings, appearing in the June 7, 2004 Proceedings of the National Academy of Science, could help biologists identify and understand the precise genetic changes that lead a species to evolve into two separate species.

Laura K. Reed and her advisor, Regents' Professor Therese Markow, made the discovery by observing breeding patterns of fruitflies that live among rotting cacti in western deserts. Whether the two closely related fruitfly populations, designated Drosophila mojavensis and Drosophila arizonae, represent one species or two is still debatable among biologists, testament to the Arizona researchers' assertion that they are in the early stages of diverging into separate species.

The seeds of speciation are sown when distinct factions of a species cease reproducing with one another. When the two groups can no longer interbreed, or prefer not to, they stop exchanging genes and eventually go their own evolutionary ways, forming separate species.

While the evolutionary record is brimming with examples of speciation events, Reed says, biologists haven't been able to put their finger on just what initiates the reproductive isolation. Several researchers have identified mutant forms of certain genes associated with the inability of fruitflies to hybridize with closely related species, but in all cases those genes were discovered long after the two species diverged. Those genetic changes could have caused the speciation or resulted from it, or they might even be incidental changes that occurred long after the species diverged. The difficulty, Reed explains, is that you have to catch the genetic schism while it's still brewing.

She and her advisor report that they have managed to do just that. In the wild, D. mojavensis and D. arizonae rarely if ever interbreed, even though their ranges overlap along a broad swath along the north
'"/>


7-Jun-2004


Page: 1 2 3

Related biology news :

1. Tracing genes, biologists show lizard migration is traced to Florida
2. UCLA molecular biologists uproot the tree of life
3. UCSD biologists develop super-endurance strain of mice
4. Springtime blooms seen earlier now than in the past, say Boston University biologists
5. UCSD biologists discover cells defense mechanism against class of disease-causing bacterial toxins
6. U of T microbiologists achieve results with pattern recognition software
7. Carnegie Mellon U biologists identify critical player in yeast ribosome assembly
8. Plant biologists Delmer, Quail, Bennetzen elected to National Academy of Sciences
9. New York microbiologists awarded research grants in antibiotic resistance and lyme disease
10. Purdue biologists expose the inner workings of viral machine
11. Protein-hungry cells go fishing, report Purdue biologists

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Parting genomes biologists discover seeds speciation

(Date:10/31/2014)... 2014  HITLAB SM , a healthcare innovation ... inaugural HITLAB Innovators Summit SM on December ... will partner with the Clinton Foundation,s Health Matters ... Columbia Business School Alumni Club of ... and Operations Research, bringing together leaders in healthcare ...
(Date:10/30/2014)... animals begin life, cells immediately begin accepting assignments to ... mammals, including humans, are special. The cells of mammalian ... to become the protective placenta or to commit to ... step that research from Michigan State University has revealed ... of PLOS Genetics , provide insights ...
(Date:10/30/2014)... in the gastrointestinal tract fulfill many vital functions ... bacteria can induce strong inflammatory responses by the ... enter the bloodstream. , Although acute inflammation is ... or systemic inflammation is linked to numerous disorders ... of inflammatory processes in the development of psychiatric ...
Breaking Biology News(10 mins):HITLAB Announces Inaugural HITLAB Innovators Summit 2HITLAB Announces Inaugural HITLAB Innovators Summit 3Identifying the source of stem cells 2Breakdown in gut barriers to bacteria may promote inflammation and craving in alcoholics 2
(Date:10/31/2014)... This is a professional and in-depth ... The report provides basic biocides information, including its ... well as industry overview. This research covers the ... well as Global industry analysis covering macroeconomic environment ... Chinese biocides industry covers information on ...
(Date:10/31/2014)... New York, NY (PRWEB) October 31, 2014 ... sectors such as healthcare, construction, finance and consumer ... applications. For this reason, industry research firm IBISWorld ... Software industry to its growing industry report collection. ... that develop software for biometric technologies such as ...
(Date:10/30/2014)... LONDON , October 30, 2014 ... Organovo Holdings Inc. (NYSE MKT: ONVO), Medivation Inc. (NASDAQ: ... PCYC ), Synthetic Biologics Inc. (NYSE MKT: SYN), and ... five companies can be accessed at: http://investor-edge.com/register ... Composite ended at 4,549.23, down 0.33%, the Dow Jones ...
(Date:10/30/2014)... October 30, 2014 On October ... Medicine Showcase in Chicago, leading applied stem cell ... Dr. Wade McKenna presented talks on New Techniques ... Surgical Applications For Stem Cells. , Dr. Riordan ... and the properties of AlphaGEMS that include: wound ...
Breaking Biology Technology:Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 2Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 3Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 2Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 2Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 3Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 4
Cached News: