Agro Times
Recent News |  Archives |  Tags |  Newsletter |  Message Board/Forum |  About |  Links |  Subscribe to AgroTimes.com RSS Feed Subscribe


More Articles
Songbird student pilots delay departure and make frequent stopovers during first migrationSongbird student pilots delay departure and make frequent stopovers during first migration

Researchers develop models to study polyelectrolytes, including DNA and RNAResearchers develop models to study polyelectrolytes, including DNA and RNA

Water leads to chemical that gunks up biofuels productionWater leads to chemical that gunks up biofuels production

Conclusive evidence on role of circulating mesenchymal stem cells in organ injuryConclusive evidence on role of circulating mesenchymal stem cells in organ injury

Enabling a new future for cloud computingEnabling a new future for cloud computing

Driving brain rhythm makes mice more sensitive to touchDriving brain rhythm makes mice more sensitive to touch

Paleontologists describe a possible dinosaur nest and young 'babysitter'Paleontologists describe a possible dinosaur nest and young 'babysitter'

Nanodiamonds are foreverNanodiamonds are forever

Parents, listen next time your baby babblesParents, listen next time your baby babbles

Yellowstone supereruption would send ash across North AmericaYellowstone supereruption would send ash across North America

Plug n' play protein crystalsPlug n' play protein crystals

Tilted acoustic tweezers separate cells gentlyTilted acoustic tweezers separate cells gently

Cool moleculesCool molecules

A spectacular landscape of star formationA spectacular landscape of star formation

Study: Earth can sustain more terrestrial plant growth than previously thoughtStudy: Earth can sustain more terrestrial plant growth than previously thought

Evolutionary history of honeybees revealed by genomicsEvolutionary history of honeybees revealed by genomics

Bombarded by explosive waves of information, scientists review new ways to process and analyze Big DataBombarded by explosive waves of information, scientists review new ways to process and analyze Big Data

Key to speed? Elite sprinters are unlike other athletes -- deliver forceful punch to groundKey to speed? Elite sprinters are unlike other athletes -- deliver forceful punch to ground

Abusive leadership infects entire teamAbusive leadership infects entire team

Program earns kudos for improving grades, retaining studentsProgram earns kudos for improving grades, retaining students

Common household chemicals decrease reproduction in mice, study findsCommon household chemicals decrease reproduction in mice, study finds

A self-organizing thousand-robot swarmA self-organizing thousand-robot swarm

Crash-testing rivetsCrash-testing rivets

Scientists discover the miracle of how geckos move, cling to ceilingsScientists discover the miracle of how geckos move, cling to ceilings

Geography matters: Model predicts how local 'shocks' influence U.S. economyGeography matters: Model predicts how local 'shocks' influence U.S. economy

A healthy lifestyle adds years to lifeA healthy lifestyle adds years to life

Strict diet suspends development, doubles lifespan of wormsStrict diet suspends development, doubles lifespan of worms

Identified for the first time what kind of explosive has been used after the detonationIdentified for the first time what kind of explosive has been used after the detonation

Copied from nature: Detecting software errors via genetic algorithmsCopied from nature: Detecting software errors via genetic algorithms

Self-fertilizing plants contribute to their own demise (6/26/2013)

Tags:
crop, crops, diversity, lead, plants, protein, reproduction, research, yield
At left: This is <I>Capsella rubella</I>, red shepherd's purse, a selfing derivative species. At right: This is <I>Capsella grandiflora</I>, an outcrossing species. (Photo: Gavin Douglas and Young Wha Lee) -  Photo: Gavin Douglas and Young Wha Lee
At left: This is Capsella rubella, red shepherd's purse, a selfing derivative species. At right: This is Capsella grandiflora, an outcrossing species. (Photo: Gavin Douglas and Young Wha Lee) - Photo: Gavin Douglas and Young Wha Lee

Many plants are self-fertilizing, meaning they act as both mother and father to their own seeds. This strategy - known as selfing - guarantees reproduction but, over time, leads to reduced diversity and the accumulation of harmful mutations. A new study published in the scientific journal Nature Genetics shows that these negative consequences are apparent across a selfing plant's genome, and can arise more rapidly than previously thought.

In the study, an international consortium led by Stephen Wright in the Department of Ecology and Evolutionary Biology at the University of Toronto sequenced the genome of the plant species Capsella rubella, commonly known as Red Shepherd's Purse. They found clear evidence that harmful mutations were accumulating over the species' relatively short existence.

"The results underscore the long-term advantages of outcrossing, which is the practice of mating between individuals, that gives us the wide array of beautiful flowers," said Wright. "Selfing is a good short-term strategy but over long timescales may lead to extinction."

Red Shepherd's Purse is a very young species that has been self-fertilizing for less than 200,000 years. It is therefore especially well-suited for studying the early effects of self-fertilization. By contrasting Red Shepherd's Purse with the outcrossing species that gave rise to it, the researchers showed that self-fertilization has already left traces across the genome of Red Shepherd's Purse.

"Harmful mutations are always happening," said Wright. "In crops, they could reduce yield just as harmful mutations in humans can cause disease. The mutations we were looking at are changes in the DNA that change the protein sequence and structure."

The findings represent a major breakthrough in the study of self-fertilization.

"It is expected that harmful mutations should accumulate in selfing species, but it has been difficult to support this claim in the absence of large-scale genomic data," says lead author Tanja Slotte, a past member of Wright's research team and now a researcher at Uppsala University. "The results help to explain why ancient self-fertilizing lineages are rare, and support the long-standing hypothesis that the process is an evolutionary dead-end and leads to extinction."

The researchers said that with many crops known to be self-fertilizing, the study highlights the importance of preserving crop genetic variation to avoid losses in yield due to mutations accumulating.

Note: This story has been adapted from a news release issued by the University of Toronto

Post Comments:

Search
New Articles
Piglet weaning age no bar to litter frequencyPiglet weaning age no bar to litter frequency

Sheepdogs use simple rules to herd sheep

Core mechanism for root growth identifiedCore mechanism for root growth identified

Researchers find boron facilitates stem cell growth and development in cornResearchers find boron facilitates stem cell growth and development in corn

Effort to confront Africa's soil health crisis helps millions of farmers triple yields

Ice cream goes Southern, okra extracts may increase shelf-life

Hot-spring bacteria reveal ability to use far-red light for photosynthesisHot-spring bacteria reveal ability to use far-red light for photosynthesis

How steroid hormones enable plants to growHow steroid hormones enable plants to grow

Plants may use newly discovered language to communicate, scientist discoversPlants may use newly discovered language to communicate, scientist discovers

Statistical model predicts performance of hybrid riceStatistical model predicts performance of hybrid rice

Genetically engineered fruit flies could save cropsGenetically engineered fruit flies could save crops

Making cashews safer for those with allergies

Wine symposium explores everything you wanted to know about the mighty grape (video)Wine symposium explores everything you wanted to know about the mighty grape (video)

Elderly with depression, mild cognitive impairment more vulnerable to accelerated brain aging

Wild sheep show benefits of putting up with parasitesWild sheep show benefits of putting up with parasites



Archives
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009


Science Friends
Astronomy News
Sports Tech
Biology News
Biomimicry Science
Cognitive Research
Chemistry News
Tissue Engineering
Cancer Research
Cybernetics Research
Electonics Research
Fossil News
Forensics Report
Genetic Archaeology
Genetics News
Geology News
Microbiology Research
Nanotech News
Physics News
Parenting News


  Archives |  Submit News |  Advertise With Us |  Contact Us |  Links
Use of this site constitutes acceptance of our Terms of Service and Privacy Policy. All contents © 2000 - 2015 Web Doodle, LLC. All rights reserved.