. Energy News .

Unique Gene Combinations Control Tropical Maize Response to Day Lengths
by Staff Writers
Madison WI (SPX) Jun 17, 2011

illustration only

Tropical maize proves to be a valuable genetic resource, containing genetics not found in USA Corn Belt maize. Most tropical maize varieties respond to the long summer day lengths that occur in U.S. growing regions by flowering late.

This delayed flowering response results in poor yields, effectively trapping the useful genes and hindering their incorporation into maize hybrids adapted to the most productive corn growing regions.

Scientists from the United States Department of Agriculture - Agricultural Research Service and North Carolina State University identified four regions of the maize genome that control much of the photoperiod response in maize. A diverse sample of maize lines bred in Mexico and Thailand were crossed into a standard Corn Belt maize line.

Results of this study were reported in the May - June issue of Crop Science, the scientific journal published by the Crop Science Society of America.

For each key day length response region, the researchers compared the effects of moving the genes from a tropical variety into a Corn Belt variety. Even at a single genome region, the effects of tropical genes differed, depending on which tropical variety they were bred from.

In the most extreme case, the scientists discovered that genes from tropical varieties did not have uniform effects on delayed flowering at the genome region. One of the tropical varieties carried genes that made plants flower earlier than the standard Corn Belt variety.

James Holland, who conducted the study, stated: "We were pleased to validate the effects of these four day length response gene regions that we had identified in previous independent studies.

"However, we were surprised to discover that some tropical lines carry early flowering genes at our most important day length genome region. Our results highlight the amazing genetic variation that exists in both tropical and temperate maize."

This research supports findings of other scientists about the genomic position of key day length response genes and reveals unexpected diversity in their effects on flowering. Ongoing research is focused on identifying the specific genes controlling day length response that exist in these regions.

The full article is available for no charge for 30 days following the date of this summary.

Related Links
North Carolina State University
Farming Today - Suppliers and Technology

Get Our Free Newsletters Via Email
Buy Advertising Editorial Enquiries

. Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Dawn of agriculture took toll on health
Atlanta GA (SPX) Jun 17, 2011
When populations around the globe started turning to agriculture around 10,000 years ago, regardless of their locations and type of crops, a similar trend occurred: The height and health of the people declined. "This broad and consistent pattern holds up when you look at standardized studies of whole skeletons in populations," says Amanda Mummert, an Emory graduate student in anthropology. ... read more

NASA/NOAA GOES Project Releases 2 Week Movie of Chilean Volcanic Eruption

Landsat 5 Satellite Sees Mississippi River Floodwaters Lingering

Landsat 5 Satellite Helps Emergency Managers Fight Largest Fire in Arizona History

Earth from Space: A gush of volcanic gas

Helping shape space-based technology policies

Russia plans to launch six Glonass satellites in 2011

India plans to make GPS more accurate with GAGAN

EU to launch Galileo satellites this fall

Euro ministers to seek forests agreement

Integrating agriculture and forestry in the landscape is key to REDD

Afforestation will hardly dent warming problem: study

WWF says Croatia is destroying 'Europe's Amazon'

ORNL neutrons, simulations reveal details of bioenergy barrier

First wood-digesting enzyme found in bacteria could boost biofuel production

Viable Pathway to Develop Sustainable Aviation Biofuels Industry

Winston Wong Bio-Inspired Ice Vehicle Premiered at NCKU

Historic One Dollar-Per-Watt Solar Modules Just Months Away

REC Solar Expanding Rapidly in US East Coast Markets

HelioSage and MTC Logistics Power Baltimore Facility With Solar

Arise Solar's new solar for Tresor Family Apartments

Olympic Steel Installs Wind Turbine

Siemens unveils wind turbine prototype

German port's future blowing in the wind

China wind energy firms back subsidy move: report

21 dead in China mine floods: state media

19 trapped in flooded China coal mines: Xinhua

13 dead in China mine accidents: state media

Massey Energy blamed for mine disaster

China says corrupt officials flee with $120 bn

China arrests 19 over riots

Blind China activist beaten unconscious: wife

China detains 'rumour-monger' over riots

Memory Foam Mattress Review
Newsletters :: SpaceDaily Express :: SpaceWar Express :: TerraDaily Express :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

The content herein, unless otherwise known to be public domain, are Copyright 1995-2011 - Space Media Network. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement