Navigation Links
A mammoth task -- sorting out mammoth evolution
Date:5/30/2011

Mammoths were a diverse genus that roamed across Eurasia and North America during the Pleistocene era. In continental North America, at least two highly divergent species have long been recognized woolly mammoths (Mammuthus primigenius) and Columbian mammoths (M. columbi). But new genetic evidence published in BioMed Central's open access journal Genome Biology suggests that these species may have been closely related enough to mate when they had the chance.

Remains of woolly mammoths have been found across the glacial tundra-steppe of Eurasia and northern North America, while the much physically larger Columbian mammoths inhabited the savannah environments of temperate southern and central North America. The differences between the species have long been considered as unique adaptations to the environments where they evolved. But by piecing together trace fragments of DNA from an 11 thousand year-old Columbian mammoth from Fairview, Utah, a team of Canadian, American and French researchers found that surprisingly the mitochondrial genome from this mammoth was nearly indiscernible from that of its northern woolly counterparts.

But the group does not suspect that this requires a re-write of North American mammoth evolution. "We think this individual may have been a woolly-Columbian hybrid," says Jacob Enk of the McMaster Ancient DNA Centre, the group that led the research. "Living African elephant species interbreed where their ranges adjoin, with males of the bigger species out-competing the smaller for mates. This results in mitochondrial genomes from the smaller species showing up in populations of the larger. Since woolly and Columbian ranges periodically overlapped in time and space, it's likely that they engaged in similar behaviour and left a similar genetic signal." The team goes on to suggest that interbreeding may explain some mammoth fossils that have intermediate physical characteristics, between woollies and Columbians, sometimes assigned to the species M. jeffersonii.

They do not rule out other explanations however, and note that the only way to know for sure whether their mammoth was a hybrid is to sequence nuclear DNA from it and other mammoths. For poorly-preserved remains like those of southern-ranging Columbians, this will be a challenge. But they expect that by exploiting new cutting-edge sequencing technologies, the nuclear genomes of these amazing animals are within reach.


'/>"/>

Contact: Dr. Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert

Related biology news :

1. Being good moms couldnt save the woolly mammoth
2. Dwindling green pastures, not hunting, may have killed off the mammoth
3. Extinction of woolly mammoths may have been due to addition of a predator: Humans
4. Trophic cascades of disruption may include loss of woolly mammoth, saber-toothed cat
5. After mastodons and mammoths, a transformed landscape
6. New discovery suggests mammoths survived in Britain until 14,000 years ago
7. Sorting device for analyzing biological reactions puts the power of a lab in a researcher’s pocket
8. Sorting the drivers from the passengers in the cancer genome
9. Genetic study clarifies evolutionary origin of elusive montane red fox
10. Study shows evolutionary adaptations can be reversed, but rarely
11. Selaginella genome adds piece to plant evolutionary puzzle
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... DUBLIN , April 27, 2016 ... of the  "Global Multi-modal Biometrics Market 2016-2020"  report ... ) , The analysts forecast ... a CAGR of 15.49% during the period 2016-2020.  ... a number of sectors such as the healthcare, ...
(Date:4/15/2016)... , April 15, 2016 ... "Global Gait Biometrics Market 2016-2020,"  report to their ... ) , ,The global gait biometrics market ... 13.98% during the period 2016-2020. Gait ... which can be used to compute factors that ...
(Date:3/31/2016)...   LegacyXChange, Inc. ... LegacyXChange is excited to release its first ... be launched online site for trading 100% guaranteed authentic ... also provide potential shareholders a sense of the value ... industry that is notorious for fraud. The video is ...
Breaking Biology News(10 mins):
(Date:5/27/2016)... ... 27, 2016 , ... Doctors in Italy, Japan, the UK and the US ... protein (BAP1) gene and its link to malignant mesothelioma. Surviving Mesothelioma has just posted ... full article now. , The studies analyzed for the new report included more ...
(Date:5/26/2016)... and READING, England , May ... http://www.indegene.com ), a leading global provider of clinical, ... and healthcare organisations and TranScrip ( http://www.transcrip-partners.com ), ... throughout the product lifecycle, today announced the extension ... IntraScience.      (Logo: http://photos.prnewswire.com/prnh/20141208/720248 ...
(Date:5/26/2016)... , ... May 26, 2016 , ... ... company, today announced several positive developments that position the Company for the future. ... of the transaction, Craig F. Kinghorn has been appointed Chairman of the Board, ...
(Date:5/25/2016)... Portland, Oregon (PRWEB) , ... May 25, 2016 ... ... Base Set features a variety of fracture-specific plating options designed to address fractures ... provide industry-leading fracture fixation solutions. , The Acumed Ankle Plating System 3 is ...
Breaking Biology Technology: