Navigation Links
New romaine lettuce lines launched
Date:1/18/2011

SALINAS, CA -- California and Arizona, the two largest lettuce-producing states, account for more than 95% of the lettuce grown in the United States. Since the early 1990s, the states' lettuce crops have been subject to "dieback", a disease indicated by symptoms including mottling, yellowing, and death of older leaves, and stunting and eventual death of lettuce plants. Dieback disease, caused by two soil-borne viruses, affects romaine and leaf-type lettuce, often leading to crop loss of 60% or more. Most disturbing is the news that the virus is not effectively reduced using either chemical treatment or rotation with nonhost crops, and the virus can live on in infested soil.

In an effort to control looming economic losses to the region's vital lettuce industry, scientists are being challenged to develop new breeding lines that provide genetic resistance to the virus. Add in another challenge for researchers: some recently developed romaine cultivars that are resistant to dieback have limited shelf life, decaying quickly when processed for salad.Three romaine-type breeding lines with resistance to the disease were previously released by the U.S. Department of Agriculture-Agricultural Research Service in Salinas, California. Now, the Salinas breeding program has introduced new romaine breeding lines that prove praiseworthy in terms of both disease resistance and shelf life. Ivan Simko and Ryan J. Hayes from the USDA-ARS in Salinas, Krishna V. Subbarao of the Department of Plant Pathology at the University of California, and Rebecca Grube from the University of New Hampshire introduced the new romaine lines in a recent issue of HortScience.

SM09A and SM09B are F8 romaine breeding lines of lettuce (Lactuca sativa L.) resistant to the dieback disease and with good shelf life. SM09B was selected from a cross between 'Darkland' and PI 491224. SM09A was developed from 'Green Towers' ('Darkland' x PI 491224). "In replicated field trials, the two breeding lines showed complete resistance to dieback. Testing of salad-cut lettuce in modified atmosphere packaging indicated slower decay in the two breeding lines compared with other dieback-resistant romaine varieties", noted Simko.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Related biology news :

1. Quick school cafeteria lines could lead to healthier food choices
2. New report outlines restoration activities to speed seagrass recovery in the Florida Keys
3. New report underlines the threat to universal access to HIV prevention, treatment and care due to a slow-down in treatment scale-up and waning political will
4. Identifying subsets of patients who will respond to subsequent lines of chemotherapy
5. Proposed dietary guidelines for Americans sharply debated
6. Frost & Sullivan Award Underlines IrisGuards Product Quality Leadership
7. New $1.5 million NSF grant to track bee declines and pollination
8. Africas national parks hit by mammal declines
9. WHO guidelines on Buruli ulcer need adjustment
10. Aquatic life declines at early stages of urban development
11. Health Robotics i.v.STATION Certified as the Only Robot to Comply with Security Guidelines for Controlled Substances
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New romaine lettuce lines launched
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of the medical ... premium product recently added to the range of products distributed by Ampronix. ... ... ... Ampronix News ...
(Date:5/12/2016)... , May 12, 2016 WearablesResearch.com , ... published the overview results from the Q1 wave of ... recent wave was consumers, receptivity to a program where ... with a health insurance company. "We were ... share," says Michael LaColla , CEO of Troubadour ...
(Date:4/28/2016)... and BANGALORE, India , April ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... today announced a global partnership that will provide ... to use mobile banking and payment services.      ... a key innovation area for financial services, but it also ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... UAS LifeSciences, one of the ... brand, UP4™ Probiotics, into Target stores nationwide. The company, which has been manufacturing ... to its list of well-respected retailers. This list includes such fine stores as ...
(Date:6/23/2016)... - FACIT has announced the creation of a ... Propellon Therapeutics Inc. ("Propellon" or "the Company"), to ... of first-in-class WDR5 inhibitors for the treatment of ... an exciting class of therapies, possessing the potential ... patients. Substantial advances have been achieved with the ...
(Date:6/23/2016)... 23, 2016 Houston Methodist Willowbrook Hospital ... Sports Association to serve as their official health ... Methodist Willowbrook will provide sponsorship support, athletic training ... association coaches, volunteers, athletes and families. ... Sports Association and to bring Houston Methodist quality ...
(Date:6/23/2016)... 2016  The Prostate Cancer Foundation (PCF) is pleased to announce ... cures for prostate cancer. Members of the Class of 2016 were selected from ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
Breaking Biology Technology: