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 October 24, 2014 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 October 24, 2014).

Share This



More Plants & Animals News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
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