Navigation Links
Team led by IU biologists confirms sunflower domesticated in US, not Mexico
Date:8/15/2011

cated varieties known to have originated from an eastern North American domestication site. The study looked at 60 sunflower populations from the U.S. and Canada and 31 from Mexico.

"Even though we made extensive new collections of wild and cultivated sunflowers native to Mexico that for the first time provided us with a powerful sample to test for a second origin, our results from multiple types of genetic data found strong evidence for just a single origin," Blackman said.

The analysis of hereditary molecular differences in the three sunflower genes shown to have experienced selective sweeps -- the loss or lowering of variation in DNA sequences due to artificial or natural selection -- confirmed that domesticated sunflowers grown in Mexico today are descended from the same cultivated genetic lineage as eastern North America domesticated sunflowers. All of those varieties, whether from Mexico or North America, carried sequences diagnostic for cultivation at the domestication at these loci, and genetic ancestry inferred from neutral markers scattered throughout the genome independently and unambiguously confirmed the same result.

A few qualifications remain, as the team could have missed finding a modern Mexican domesticated version descended from an independent Mexican lineage. There may have also been an ancient Mexican lineage that has since become extinct and for which no modern germplasm has survived. Some scientists have speculated that extinction could have been facilitated by the proposed role colonial Spanish Christians may have taken in eradicating sunflower as an important religious symbol to the solar-worshipping Aztecs, or recently by the substantial influx of seed imports made possible by the North American Free Trade Agreement.

"Although current archaeological finds indicate that ancient Mesoamericans cultivated sunflower before Spanish colonists arrived in the New World, more discoveries are needed to understan
'/>"/>

Contact: Steve Chaplin
stjchap@iu.edu
812-856-1896
Indiana University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Open minded and open access: NeoBiota, a new publishing platform for invasion biologists
2. Plant biologists dissect genetic mechanism enabling plants to overcome environmental challenge
3. Cell biologists hail stem cell decision
4. Software helps synthetic biologists customize protein production
5. Biologists discover an evening protein complex that regulates plant growth
6. Purdue biologists identify new strategy used by bacteria during infection
7. New curation tool a boon for genetic biologists
8. 2 UC Davis plant biologists named as HHMI-GBMF investigators
9. Announcing BIOLOGY OPEN from the Company of Biologists
10. Manage biological invasions like natural disasters, biologists say
11. MIT systems biologists use computer models to predict animal cell behavior
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... , Dec. 18, 2014 Research and ... the addition of the "iPhone 5S Fingerprint ... Report" report to their offering. ... the acquisition of AuthenTec in July 2012, Apple ... 5S. It is currently the only device of ...
(Date:12/19/2014)... Dec. 18, 2014 Research and Markets ... "Micro Market Monitor: North America Perimeter Security Systems ... http://photos.prnewswire.com/prnh/20130307/600769 The North American ... CAGR of 3.6% from 2014 to 2019. Although the ... Canada is expected to grow ...
(Date:12/19/2014)... Calif. , Dec. 18, 2014  23andMe, Inc., ... of a study that pinpoints fine-scale differences in genetic ... States . Since immigrants first arrived ... United States has served as a meeting ... how American history and the ongoing mixing of peoples ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 323andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... of Earth observation missions expanding, it makes sense ... mission control from a combined Dedicated Control Room. ... and generating improved economic returns. , Flight control ... out of a combined Earth Observation (EO) Dedicated ...
... today announced details of a membership agreement with BioMed ... by its researchers. Pfizer,s BioMed Central membership arrangement ... for any researcher employed or funded by Pfizer when ... Central,s 190+ peer-reviewed open access journals. By funding open ...
... down on a Honduran naval boat as it criss-crossed the ... Central Americas most important seaports. Aboard the vessel, Miguel ... the distant horizon with some hint of concern on his ... the last few readings were definitely off. Miguel, along ...
Cached Biology News:ESA's Earth observation missions: Sharing teams and facilities boosts efficiency 2ESA's Earth observation missions: Sharing teams and facilities boosts efficiency 3Searching for pollution in the Caribbean 2Searching for pollution in the Caribbean 3Searching for pollution in the Caribbean 4Searching for pollution in the Caribbean 5Searching for pollution in the Caribbean 6Searching for pollution in the Caribbean 7Searching for pollution in the Caribbean 8
(Date:12/19/2014)... Today, TiFiber, Inc. announced ... and future company headquarters in Fort Smith, Arkansas ... that safely and effectively control dangerous microorganisms. Fort ... historic, strong support for manufacturing, but also due ... technology-based companies such as TiFiber. , In ...
(Date:12/19/2014)... (PRWEB) December 18, 2014 Ed Bilsky, ... of the Center for Excellence in the Neurosciences (CEN), ... England, has been selected as a member of the ... the first neuroscientist from Maine to receive this honor. ... organization supported entirely by the Dana Foundation. Its ...
(Date:12/19/2014)... iLab Solutions, the global leader in core ... as the new Director of Institutional Implementations and Sarah ... two new leadership positions were created to support iLab’s ... iLab continues to meet the needs of its growing ... has been deployed at over 450 core facilities across ...
(Date:12/19/2014)... The empty capsules market is experiencing growth primarily ... innovations in the empty capsules market. The fast-growing ... of the empty capsules market. , Get Full ... Report , The report will enrich both established ... gauge the pulse of the market which in ...
Breaking Biology Technology:Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 2Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 3Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 4UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3iLab Solutions Announces Two New Leadership Positions to Meet the Needs of Its Growing Customer Base 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 2Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 3Empty Capsules Market Hit to Reach $1,820 Million by 2019 - New Research Report by MarketsandMarkets 4
... businesses will receive funding for their technology development projects through ... , , BioSystem Development LLC of Middleton, will receive ... protein analysis. The company will use this award to finish ... university spin-off, we have not had the benefit of ...
... David Redick knows something about venture capital, having received ... entrepreneur. , ,Now Redick, a longtime denizen of Silicon ... the other side of the aisle with Badger ... focused on providing early stage funding and management services ...
... voted late Tuesday night to amend a bill granting ... newly created human embryonic stem cells would be denied. ... firms that do any research involving the destruction of ... cells from them after August 9, 2001. It ...
Cached Biology Technology:New Madison VC firm Badger Ventures looks for next big IT entrepreneurs 2New Madison VC firm Badger Ventures looks for next big IT entrepreneurs 3Bill would deny tax credits to firms creating stem-cell cultures 2
... Proteins (TBP). Ascites Antibody ITBP20 was raised ... acids 41-57 and may be useful in ... This antibody does not inhibit the ... nuclear extract or as a minimal activity ...
... heat sealer ideal for low to medium throughput ... a wide range of plates of differing heights ... of the sealer is pre-set for optimal sealing ... used in conjunction with ABgenes sealing foil or ...
... Re-Blot Plus Western Blot Strong Antibody Stripping ... from Western blots that have been developed ... isotopes. It is not recommended for stripping ... it is not possible to effectively remove ...
This unique buffer provides a gentle method for removal of primary and secondary antibodies to allow several reprobings on the same membrane. Gentle buffer will not alter the antigen for subsequent i...
Biology Products: