Featured Research

from universities, journals, and other organizations

Agricultural Research Service Diversifies Sunflower Traits

Date:
January 10, 2005
Source:
USDA / Agricultural Research Service
Summary:
Wild sunflowers -- whether growing beside a fast-food restaurant parking lot or clinging to shifting sand dunes -- are worth their weight in gold to Agricultural Research Service (ARS) scientists.

Cultivated sunflowers.
Credit: Photo by Edward McCain / Courtesy of USDA / Agricultural Research Service

Wild sunflowers--whether growing beside a fast-food restaurant parking lot or clinging to shifting sand dunes--are worth their weight in gold to Agricultural Research Service (ARS) scientists.

Wild species seeds, according to the researchers, contain genes for improving cultivated sunflower and bolstering its resistance to insect pests and diseases. Genes from one such species led to cytoplasmic male sterility, the mechanism by which today's sunflower breeders develop new sunflower hybrids. The economic value of traits already bred into cultivated sunflower from wild species is an estimated $267 million to $384 million annually.

ARS scientists have been collecting wild sunflowers since 1976, amassing representative populations of the 50 known Helianthus species, according to scientists Tom Gulya and Gerald Seiler, in the ARS Sunflower Research Unit, Fargo, N.D. Accessions are placed in the ARS National Plant Germplasm System (NPGS) at Ames, Iowa, for safekeeping and distribution to sunflower researchers worldwide.

The Fargo unit is a clearinghouse of sorts for newly collected specimens en route to being catalogued and stored at NPGS. Seeds are first evaluated for weight, oil content and fatty acid composition. The new accessions are then tested for possible resistance to economically important sunflower diseases.

H. annuus is the predominant Helianthus species kept at NPGS, which has 2,163 accessions. H. annuus' preference for disturbed soils--like roadside grading and constructions sites--indicates the species' tenacity and adaptability, according to Gulya. Others are habitat-specific and vulnerable to human activity. In Texas, road projects pushed aside populations of H. paradoxus. Fortunately, new ones were found in New Mexico. Now, H. paradoxus' seed is in safe storage, including its genes for breeding salt- and drought-tolerant hybrids.

Seiler and Gulya collect sunflowers once or twice a year, typically driving 2,500 to 3,000 miles per trip, much of that on back roads. They map and describe each new site so future collections can be made. They estimate at least one trip annually for the next 10 years will be needed to collect all remaining species native to the United States.

ARS is the U.S. Department of Agriculture's chief scientific research agency.


Story Source:

The above story is based on materials provided by USDA / Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA / Agricultural Research Service. "Agricultural Research Service Diversifies Sunflower Traits." ScienceDaily. ScienceDaily, 10 January 2005. <www.sciencedaily.com/releases/2005/01/050104080211.htm>.
USDA / Agricultural Research Service. (2005, January 10). Agricultural Research Service Diversifies Sunflower Traits. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2005/01/050104080211.htm
USDA / Agricultural Research Service. "Agricultural Research Service Diversifies Sunflower Traits." ScienceDaily. www.sciencedaily.com/releases/2005/01/050104080211.htm (accessed September 2, 2014).

Share This




More Plants & Animals News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Washington Wildlife Center Goes Nuts Over Baby Squirrels

Washington Wildlife Center Goes Nuts Over Baby Squirrels

Reuters - US Online Video (Aug. 30, 2014) An animal rescue in Washington state receives an influx of orphaned squirrels, keeping workers busy as they nurse them back to health. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Newsy (Aug. 29, 2014) In a new study, a promising experimental treatment for Ebola managed to cure a group of infected macaque monkeys. Video provided by Newsy
Powered by NewsLook.com
Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins