Featured Research

from universities, journals, and other organizations

From A Few Wild Ancestors, A Citrus Cornucopia

Date:
June 27, 2005
Source:
USDA / Agricultural Research Service
Summary:
Whether it's a halved grapefruit sprinkled with sugar, mandarin slices tumbled in a green salad, mouth-puckering lemon wedges or a classic navel orange, there are probably enough kinds of citrus to satisfy any personality or taste.

Fruits, vegetative tissues, and seeds showing the diversity of the citrus accessions maintained at the National Clonal Germplasm Repository for Citrus and Dates.
Credit: Photo by Peggy Greb

Whether it's a halved grapefruit sprinkled with sugar, mandarin slices tumbled in a green salad, mouth-puckering lemon wedges or a classic navel orange, there are probably enough kinds of citrus to satisfy any personality or taste.

Related Articles


But scientists with the Agricultural Research Service (ARS) in Riverside, Calif., who recently assessed their extensive collection of Citrus species from around the world, have found that despite the long list of seemingly distinct and different citrus fruits, the majority of those most familiar to us are hybrids that got their start from just a handful of wild citrus species.

For their study, the team of researchers, led by ARS horticulturalist Robert Krueger, delved into the genes of nearly 1,000 citrus accessions comprising seeds, fruit, live trees and pollen kept inside greenhouses and in outdoor groves at the University of California-Riverside (UCR).

They wanted to determine the true genetic diversity of the collection by identifying duplicate accessions and linking those that are genetically similar.

The researchers created 13 new molecular markers to help them track the accessions' genetic similarities. Like markers used in forensic cases to determine parental lines, the markers let the scientists draw relationships between the numerous citrus specimens and group together more closely related ones.

Along with Mikeal Roose of the UCR Department of Botany and Plant Sciences and former UCR graduate student Noelle Barkley, Krueger discovered that most of the genetic diversity of the collection's hundreds of citrus accessions was found in only about 50 accessions.

According to ARS research leader Richard Lee, this relatively small subset likely represents much of the diversity of the entire Citrus genome. Using it will help researchers more efficiently pinpoint valuable citrus genes related to pest and disease resistance and high nutrient levels.

In addition to its research function, ARS' citrus collection is a critical resource for safeguarding rare and wild citrus specimens, especially given increasing encroachment pressures facing native citrus stands in Southeast Asia.

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. "From A Few Wild Ancestors, A Citrus Cornucopia." ScienceDaily. ScienceDaily, 27 June 2005. <www.sciencedaily.com/releases/2005/06/050619193743.htm>.
USDA / Agricultural Research Service. (2005, June 27). From A Few Wild Ancestors, A Citrus Cornucopia. ScienceDaily. Retrieved January 29, 2015 from www.sciencedaily.com/releases/2005/06/050619193743.htm
USDA / Agricultural Research Service. "From A Few Wild Ancestors, A Citrus Cornucopia." ScienceDaily. www.sciencedaily.com/releases/2005/06/050619193743.htm (accessed January 29, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, January 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Brawling Pandas Are Violently Adorable

Brawling Pandas Are Violently Adorable

Buzz60 (Jan. 29, 2015) Video of pandas play fighting at the Chengdu Research Base in China will make your day. Mara Montalbano (@maramontalbano) shows us. Video provided by Buzz60
Powered by NewsLook.com
Why Researchers Say We Should Cut Back On Biofuels

Why Researchers Say We Should Cut Back On Biofuels

Newsy (Jan. 29, 2015) Biofuels aren&apos;t the best alternative to fossil fuels, according to a new report. In fact, they&apos;re quite a bad one. Video provided by Newsy
Powered by NewsLook.com
3-D Printed Wheelchair Helps Two-Legged Dog Learn to Run

3-D Printed Wheelchair Helps Two-Legged Dog Learn to Run

Buzz60 (Jan. 29, 2015) 3-D printing helps another two-legged dog run around with his four-legged friends. Jen Markham (@jenmarkham) has the adorable video. Video provided by Buzz60
Powered by NewsLook.com
Dogs Bring on So Many Different Emotions in Their Human Best Friends

Dogs Bring on So Many Different Emotions in Their Human Best Friends

RightThisMinute (Jan. 28, 2015) From new-puppy happy tears to helpful-grocery-carrying-dog laughter, our four-legged best friends can make us feel the entire spectrum of emotions. Video provided by RightThisMinute
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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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