Navigation Links
Good breeding increases shelf life
Date:7/17/2008

SALINAS, CA - The lettuce cut and packaged for food service and salad mixes is an increasingly important component of the produce industry. Lettuce is highly perishable, and the cutting required in processing further shortens its shelf life.

Packaging cut lettuce and other fresh produce in semipermeable plastic films extends shelf life via a technique called "modified-atmosphere packaging". The success of modified-atmosphere (MA) packaging for lettuce and certain salad greens has led to innovative products, marketing strategies, and enhanced sales to consumers.

Increased demand for the convenient, pre-cut salads and lettuce has led to scientists to search for ways to select lettuce cultivars that stay fresh, colorful, and crisp. Shelf life and visual quality of salad-cut lettuce are affected by many things, including production environment, vegetative maturity, and type of lettuce chosen. Although an increasing variety of lettuce types are being grown, romaine and "crisphead" (such as iceberg) are the most widely produced for salad-cut products

Ryan J. Hayes, a research geneticist, and Yong-Biao Liu, research entomologist at the U.S. Department of Agriculture's Agricultural Research Service, published the results of a study that should give lettuce breeders and producers enhanced product information and a market edge. During the two-year study, lettuce was processed from field-grown plants of 33 romaine and three "crisphead" cultivars. Shelf life of each cultivar was evaluated after storage in modified-atmosphere bags and in CO2-free controlled-atmosphere chambers.

Lettuce cultivars 'Clemente', 'Darkland', and 'Green Forest' performed consistently well, ranking in the top 10 in every experiment. 'Alpi', 'Dark Green Romaine', and 'Queen of Hearts' showed clearly unstable shelf life. Hayes noted, "cultivars that performed well in our MA environments will likely be useful as parents in breeding programs to develop new romaine cultivars with an acceptable shelf life. It is also clear that not all crisphead cultivars have good shelf life. Wide variation was observed between the crisphead cultivars Pacific, Salinas 88, and La Brillante."

In concluding the impact of the study outcomes, Hayes stated; "Breeders can use these methods to characterize or identify breeding lines that are suitable for salad-cut markets before release, and to select for increased shelf life within breeding populations. These practices should facilitate a consistent release of germplasm with high quality in MA environments."


'/>"/>

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

Related biology news :

1. Savanna habitat drives birds, and perhaps others, to cooperative breeding
2. Uncertainty drives the evolution of cooperative breeding in birds
3. Parasites might spur evolution of strange amphibian breeding habits
4. Study finds Viagra increases release of key reproductive hormone
5. Springer increases publishing activities in South Korea
6. Age increases chance of success as two-timer
7. Drug commonly used to treat bipolar disorder dramatically increases lifespan in worms
8. Waterborne carbon increases threat of environmental mercury
9. New study increases concerns about climate model reliability
10. Varying prevalence among ethnic groups of gene mutation that increases risk of breast cancer
11. Washington University increases fleet of Roche Genome Sequencer FLX Systems
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Good breeding increases shelf life
(Date:4/3/2017)... , April 3, 2017  Data captured ... engineering platform, detected a statistically significant association ... prior to treatment and objective response of ... potential to predict whether cancer patients will ... treatment, as well as to improve both pre-infusion ...
(Date:3/29/2017)... 29, 2017  higi, the health IT company that ... North America , today announced a Series B ... of EveryMove. The new investment and acquisition accelerates higi,s ... to transform population health activities through the collection and ... higi collects and secures data today on behalf ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
Breaking Biology News(10 mins):
(Date:5/26/2017)... ... 25, 2017 , ... LabRoots , the leading provider of scientific trending ... world, is announcing a new textbook scholarship, the second scholarship in the LabRoots program. ... years or older, pursuing a degree in one of the life sciences. The scholarship ...
(Date:5/24/2017)... ... May 24, 2017 , ... Today, ... CLEARAS Water Recovery’s Advanced Biological Nutrient Recovery (ABNR™) technology at its 4,000,000 gallon ... million plant upgrade to sustainably meet current and future nutrient discharge regulations. The ...
(Date:5/24/2017)... BELLINGHAM, Washington, and WASHINGTON, DC, USA (PRWEB) , ... May 23, ... ... powerful driver of the economy as well as an enabler of life-saving medical and ... society for optics and photonics . They joined others in the scientific community today ...
(Date:5/24/2017)... , May 23, 2017 As Ebola resurfaces in ... four deaths and 20 suspected cases now reported, a new ... PubMed database, showed a correlation between the 2014 and 2017 ... counts rose sharply in 2012-13, which preceded the 2014 outbreak. ... the Ebola gene Replikin counts in 2014-15, which again precedes ...
Breaking Biology Technology: