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:4/13/2017)... UBM,s Advanced Design and Manufacturing event in ... and evolving technology through its 3D Printing and Smart ... the expo portion of the event and feature a ... on trending topics within 3D printing and smart manufacturing. ... will take place June 13-15, 2017 at the Jacob K. ...
(Date:4/11/2017)... , Apr. 11, 2017 Research and Markets ... 2017-2021" report to their offering. ... The global eye tracking market to grow at a CAGR ... Global Eye Tracking Market 2017-2021, has been prepared based on an ... the market landscape and its growth prospects over the coming years. ...
(Date:4/6/2017)... Forecasts by Product Type (EAC), ... End-Use (Transportation & Logistics, Government & Public Sector, Utilities ... Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation (BFSI), ... you looking for a definitive report on the $27.9bn ... ...
Breaking Biology News(10 mins):
(Date:6/20/2017)... Fairfield, Iowa (PRWEB) , ... June 20, 2017 ... ... a chance to immediately determine the adulterants which pose the most likely threat ... 25 - 28 of this year. , IFT's annual food expo attracts ...
(Date:6/20/2017)... Parsippany, NJ (PRWEB) , ... June 20, 2017 , ... ... OHAUS makes the transition from being a trusted supplier in the weighing industry, to ... including cell extractions, ELISA essays, enzyme reactions, immunoassays, hybridizations and more, allowing for ...
(Date:6/19/2017)... ... June 19, 2017 , ... EDETEK, Inc., a ... that it is launching two new additions of its award-winning cloud-based platform CONFORM™: ... at the DIA 2017 Annual Meeting in Chicago, IL, June 19-22, 2017. , ...
(Date:6/16/2017)... ... June 16, 2017 , ... Cognition Corporation , ... two more sessions of its “From the Helm” Webinar Series. , The ... online templates for design control exercises. Led by David Cronin, Cognition’s CEO, the ...
Breaking Biology Technology: