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:11/4/2014)... LAKE CITY, Nov. 5, 2014 – University of Utah ... enzymes to help jet fuel produce electricity without needing ... be used to power portable electronics, off-grid power and ... online today in the American Chemical Society journal ... electricity through a chemical reaction between a fuel and ...
(Date:11/4/2014)... PA) – Temple University School of Medicine announced ... winner, an initiative funded by the Bill & ... Professor of Obstetrics, Gynecology and Reproductive Sciences; and ... Temple University School of Medicine will pursue an ... "Maternal Blood Biomarkers to Assess Fetal Neurodevelopment.", Grand ...
(Date:11/4/2014)... A newly published research study examining only marketing ... of fast food restaurants has found that the ... disproportionately exposed to such marketing tactics. , Authored ... her colleagues, the study is the first to ... interior and exterior of fast food restaurants and ...
Breaking Biology News(10 mins):Jet-fueled electricity at room temperature 2Temple University School of Medicine receives Grand Challenges Explorations grant 2Fast food marketing for children disproportionately affects certain communities 2Fast food marketing for children disproportionately affects certain communities 3
(Date:11/24/2014)... 24, 2014 2014 Deep Research ... is a professional and in-depth research report on ... information, like its definition, classification, application, and industry ... report covers the international market analysis, including China’s ... the US, Europe, Asia, China, Japan etc. regions) ...
(Date:11/24/2014)... , Nov. 24, 2014  Spherix Incorporated ... company committed to the fostering and monetization of ... v. VTech Telecommunications Ltd.,  Case No. 3:13-cv-03494-M and  ... No. 3:13-cv-03496-M, both in the United States District ... Texas . On November ...
(Date:11/23/2014)... Apiscent Labs, a privately held ... ingredients to the global pharmaceutical and flavor & ... website, Apiscent.com. , The Apiscent.com homepage welcomes visitors ... easy navigation, rotating images and content focused on ... , The company’s work in Pharmaceutical ...
(Date:11/22/2014)... (PRWEB) November 21, 2014 During his ... understood the need to surround himself with great people ... and entrepreneur, his friends often marveled at his extraordinarily ... lived his life and -- even with his death ... the Alzheimer’s disease that would ultimately take his life. ...
Breaking Biology Technology:Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 3Markman Hearing Held as Scheduled in VTech and Uniden Cases 2Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 2Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 3
Cached News: