University of California, Riverside

UCR Newsroom



UC Riverside Licenses Leading South African Company to Market ‘GEM’ Avocados


UC Riverside Licenses Leading South African Company to Market ‘GEM’ Avocados

University’s latest avocado variety is an attractive high-quality fruit; expected to give stiff competition to other avocado varieties

(May 12, 2011)

NEWS MEDIA CONTACT

Name: Iqbal Pittalwala
Tel: (951) 827-6050
E-mail:
'GEM' avocados on tree.  Photo credit: Arpaia lab, UC Riverside. (More photos below.)Enlarge

'GEM' avocados on tree. Photo credit: Arpaia lab, UC Riverside. (More photos below.)

RIVERSIDE, Calif. – The University of California, Riverside has signed an exclusive license agreement with Westfalia Fruit Estates, a South African company, to market ‘GEM,’ an avocado variety developed by UC Riverside researchers.

According to the agreement signed last month, Westfalia will be UC Riverside’s primary licensee for ‘GEM’ around the world. Currently, in the United States, the California–based Brokaw Nursery has non-exclusive rights to the ‘GEM’ avocado.

“UC Riverside’s Office of Technology Commercialization continues to seek out the best partnerships worldwide for the commercialization of citrus and other agriculture varieties developed at our campus,” said Craig Sheward, assistant vice chancellor for technology commercialization at UCR. “Westfalia is a leading multinational avocado supplier and a worldwide leader in avocado research, marketing, processing, production and commercialization. It will be through the future successful efforts of Westfalia that UCR’s avocado varieties will have an impact on the world-wide avocado market.”

Named after the initials of researcher Grey E. Martin, who selected the variety, ‘GEM’ fruit are produced on a semi-compact, vase shaped tree. The fruit’s skin color turns from green (when on the tree) to a dark burgundy/black when ready to eat. The tear-drop shaped fruit are borne typically interior in the tree, mostly in clusters, thus protecting the fruit from the elements. The trees also are less prone to severe “alternate bearing” (abundant fruit one year followed by few fruit the next year) than ‘Hass,’ currently the dominant variety in the commercial trade.

The ‘GEM’ variety can grow anywhere in the world where growing conditions are similar to Southern California's (San Diego–San Luis Obispo Counties). The seasonality of ‘GEM’ is somewhat later than that of ‘Hass,’ allowing for a later start of harvesting and subsequently a later marketing window. In California, the fruit will hang on the tree very well into August and early September. In cooler places, like coastal Santa Barbara, Calif., it can hang on the tree until October.

“The ‘GEM’ avocado variety’s attractive look and high quality are what got Westfalia interested in the fruit,” said Stefan Köhne, the research and development manager for Westfalia. “This is a variety which, under South African conditions, matures a few weeks later than the ‘Hass’ variety. Westfalia is particularly encouraged by the positive outcome of independent taste panels conducted in the United Kingdom, where ‘GEM’ scored better than late season ‘Hass’ in terms of eating quality. ‘GEM’ trees also lend themselves to being planted in higher densities, and the compactness of the tree will allow for easier management of the trees. The ‘GEM’ variety is starting to distinguish itself not only as a superior high quality fruit for the customer but also an attractive cultivar for the grower to produce and manage.”

UCR has developed other avocado varieties before ‘GEM’: ‘Gwen,’ ‘Whitsell’ and ‘Esther’ were released in the early 1980s; ‘SirPrize’ and ‘Lamb Hass’ in the mid-1990s; and ‘Harvest’ in the 2000s.

“Avocados are always a challenge since the selection rate for promising material is about 1-2 selections per 1000 seeds planted,” said UCR’s Mary Lu Arpaia, a cooperative extension subtropical horticulturalist, who leads the current program searching for new varieties. “The ‘GEM’ variety arose from a mass planting of seedlings planted in the late 1980s. This selection is a seedling of the ‘Gwen’ variety.”

In South Africa, Westfalia plans to market ‘GEM’ towards the end of the traditional avocado harvesting season. The company will market ‘GEM’ almost exclusively through Woolworths, a leading high-end retail chain store in South Africa. Outside South Africa, the company will market the fruit, as a pre-ripened avocado of superior eating quality, primarily through high-end retail chain stores. Westfalia also plans to contract ‘GEM’ growers and marketers in Australia, Brazil, Chile, Colombia, the European Union, Israel, Morocco, New Zealand, Peru, Tangier and countries in sub-Saharan Africa to ensure fruit availability year-round.
Comparison of the 'Hass' and 'GEM' avocado varieties.  Photo credit: Sylvie Kremer-Köhne, Westfalia.Enlarge

Comparison of the 'Hass' and 'GEM' avocado varieties. Photo credit: Sylvie Kremer-Köhne, Westfalia.

'Hass' avocado versus 'GEM' avocado.  Photo credit: Arpaia lab, UC Riverside.Enlarge

'Hass' avocado versus 'GEM' avocado. Photo credit: Arpaia lab, UC Riverside.

Freshly cut 'GEM' avocados.  Photo credit: UCR Strategic Communications.Enlarge

Freshly cut 'GEM' avocados. Photo credit: UCR Strategic Communications.

UCR researcher cuts a 'GEM' avocado from tree.  Photo credit: UCR Strategic Communications.Enlarge

UCR researcher cuts a 'GEM' avocado from tree. Photo credit: UCR Strategic Communications.

'GEM' avocado on a tree.  Photo credit: UCR Strategic Communications.Enlarge

'GEM' avocado on a tree. Photo credit: UCR Strategic Communications.

The University of California, Riverside (www.ucr.edu) is a doctoral research university, a living laboratory for groundbreaking exploration of issues critical to Inland Southern California, the state and communities around the world. Reflecting California's diverse culture, UCR's enrollment has exceeded 21,000 students. The campus opened a medical school in 2013 and has reached the heart of the Coachella Valley by way of the UCR Palm Desert Center. The campus has an annual statewide economic impact of more than $1 billion.

A broadcast studio with fiber cable to the AT&T Hollywood hub is available for live or taped interviews. UCR also has ISDN for radio interviews. To learn more, call (951) UCR-NEWS.

More Information 

General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

Department Information

Media Relations
900 University Avenue
1156 Hinderaker Hall
Riverside, CA 92521

Tel: (951) 827-6397 (951) UCR-NEWS
Fax: (951) 827-5008

Related Links

Footer