Navigation Links
Analysis finds strong match between molecular, fossil data in evolutionary studies
Date:4/28/2009

During a seminar at another institution several years ago, University of Chicago paleontologist David Jablonski fielded a hostile question: Why bother classifying organisms according to their physical appearance, let alone analyze their evolutionary dynamics, when molecular techniques had already invalidated that approach?

With more than a few heads in the audience nodding their agreement, Jablonski, the William Kenan Jr. Professor in Geophysical Sciences, saw more work to be done. The question launched him on a rigorous study that has culminated in a new approach to reconciling the conflict between fossil and molecular data in evolutionary studies.

For more than two decades, debate has waxed and waned between biologists and paleontologists about the reliability of their different methods. Until now, attention has focused on the dramatically different evolutionary history of certain lineages as determined by fossils or by genetics.

Scientists using molecular techniques assert that genetics more accurately determines evolutionary relationships than does a comparison of physical characteristics preserved in fossils. But how inaccurate, really, were the fossils? Jablonski and the University of Michigan's John A. Finarelli have published the first quantitative assessment of these assumed discrepancies in the Proceedings of the National Academy of Sciences.

They compared the molecular data to data based on the kinds of features used to distinguish fossil lineages for 228 mammal and 197 mollusk lineages at the genus level (both wolves and dogs belong to the genus Canis, for example).

No matter how they looked at it, the lineages defined by their fossil forms "showed an imperfect but very good fit to the molecular data," Jablonski said. The fits were generally far better than random. The few exceptions included freshwater clams, "a complete disaster," he said.

Jablonski and Finarelli (Ph.D.'07, Un
'/>"/>

Contact: Steve Koppes
s-koppes@uchicago.edu
773-702-8366
University of Chicago
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Scientists develop method for comprehensive proteome analysis
2. MCTP bought Genomatix NextGen Sequencing analysis stations
3. CRG buys Genomatix Next Generation Sequencing analysis solution
4. JCVI program trains USDA scientists on eukaryotic genome analysis
5. Boehringer Ingelheim uses Genomatix Next Generation Sequencing data analysis systems
6. Analysis of fresh strawberries reveals consumer preferences
7. Execretion analysis aids primate social studies
8. US science education organization updates analysis
9. Powerful online tool for protein analysis provided pro bono by Stanford geneticist
10. Microarray analysis improves prenatal diagnosis
11. MIT analysis shows how cap-and-trade plans can cut greenhouse emissions
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Analysis finds strong match between molecular, fossil data in evolutionary studies
(Date:4/23/2014)... of Public Health-Bloomington has bolstered the link between red ... association between heme iron, found only in meat, and ... that heme iron consumption increased the risk for coronary ... found between nonheme iron, which is in plant and ... study was published online ahead of print in the ...
(Date:4/23/2014)... Toronto Scarborough research shows that male black widow spiders ... a rare example of mate preference by male spiders. ... Emily MacLeod and Maydianne Andrade, a professor in UTSC,s ... studies and the wild that males overwhelmingly chose to ... black widows can tell whether a potential mate is ...
(Date:4/23/2014)... the likelihood of an accurate group decision increases with ... when a collective faces a variety of factors ... University researchers report that smaller groups actually tend to ... excessively focused on only certain pieces of information. , ... known about collective intelligence, or the "wisdom of crowds," ...
Breaking Biology News(10 mins):Study: Iron consumption can increase risk for heart disease 2Picky male black widow spiders prefer well-fed virgins 2Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3
... Va. The availability of new genome sequencing ... to test an intriguing hypothesis about how agricultures ... plant pathogens. Boris Vinatzer, assistant professor of ... College of Agriculture and Life Sciences, has received ...
... GAINESVILLE, Fla. Using the genetic equivalent of an ... the Earth endured a massive cooling period between 500 ... (Feb. 7) in the journal Nature, researchers from the ... and the biotechnology company DNA2.0 describe how they reconstructed ...
... YORK (FEBRUARY 7, 2008) Madagascars turtles and tortoises, ... will continue to crawl steadily toward extinction unless major ... by the Wildlife Conservation Society and other groups. ... capital city Antananarivo, said there is still hope to ...
Cached Biology News:Tomato pathogen genome may offer clues about bacterial evolution at dawn of agriculture 2Scientists rebuild ancient proteins to reveal primordial Earth's temperature 2Madagascar's tortoises are crawling toward extinction, groups say 2
(Date:1/15/2014)... 2014 This webinar will focus on ... safety assessment in biosimilars. , Regulatory frameworks are evolving ... development, however the complex nature of biopharmaceuticals makes the ... efficacy extremely challenging. Based on the specific aspects of ...
(Date:1/15/2014)... DTS Language Services, Inc . is ... for Life Science organizations who need document translations. Clients ... of their documents in advance with a selection of nearly ... translations, often a critical factor in clinical and scientific fields, ...
(Date:1/14/2014)... Date: Friday, April 11, 2014 , Time: 6 p.m. ... Road, Warrington, Pa. , Details: The Hepatitis B ... a cure for hepatitis B and improving the quality of ... Ball on Friday, April 11 at Warrington Country Club in ...
(Date:1/14/2014)... EquitiesIQ, a leading informational research provider, ... is an emerging biomedical company acquiring, developing, manufacturing, and ... , Free report download: http://equitiesiq.com/reports/alliqua/ , In ... team and Board, which launched the company’s new strategy ...
Breaking Biology Technology:Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... and Brent Butler 2 , ... Massachusetts, USA , ... , Introduction , ... carried out using manual pipetting. As the demand for greater throughput of plate ...
... , , , , FLEXSTATION IS A ... SIMPLE, RAPID EXPERIMENTAL SET-UP AND DATA ANALYSIS , , ... , EXCELLENT FOR ASSAY DEVELOP-MENT AS DEMONSTRATED BY Z FACTOR ... G q -coupled receptors are transmembrane proteins that are responsible ...
... , HOMOGENEOUS ASSAY , , ... PROCEDURE , , COMPATIBLE WITH MORE TARGETS ... , The ... detecting changes,in intracellular calcium concentration.,Specifically, this fast and simple fluorescencebased,assay allows the ...
Cached Biology Technology:96 Well Pipetting Precision and Accuracy Using the RapidPlate 96/384 Workstation 296 Well Pipetting Precision and Accuracy Using the RapidPlate 96/384 Workstation 396 Well Pipetting Precision and Accuracy Using the RapidPlate 96/384 Workstation 4Gq-coupled receptor assays using FLEXstation: M1 muscarinic receptor 2Gq-coupled receptor assays using FLEXstation: M1 muscarinic receptor 3Gq-coupled receptor assays using FLEXstation: M1 muscarinic receptor 4Calcium Plus Assay Kit, Superior Detection for Specialized Targets 2Calcium Plus Assay Kit, Superior Detection for Specialized Targets 3
LECHNER AND LaVECK MEDIUMfor the clonal growth of normal human bronchial and other epithelial cells. Requires additives. With glutamine.Recommended storage condition:oC to 8oCIntended use(s):research...
...
... OrientExpress™ System Modules ... synthesis and directional cloning ... T7 expression vectors ... configuring OrientExpress™ Cloning Systems, ...
... and antibody-based immunoaffinity matrices, such as ... times without compromising antigen-antibody reactivity, the ... agents has precluded the application of ... The CHEMICON Re-Blot Plus Western Blot ...
Biology Products: