North American Fruit Explorers mailing list at ibiblio

[Tom Olenio <tolenio@sentex.net>]

Hello,

The plum project is mentioned in his bio on the univ. web page as a 2002 
highlight;

http://www.uwrf.edu/extension/BrianS.htm

"Continued with the third and final year of a DATCP-Agriculture Development 
and Diversification Grant to develop new commercial plum cultivars to 
diversify the Wisconsin tree fruit industry ."

His contact information is there.  If anyone learns more about the plum let 
us know here,

http://www.uwrf.edu/extension/BrianS.htm

Later,
Tom

"Brungardt, Sam" wrote:

> Here's a recent press release that may interest some of you.  
> Unfortunately, it doesn't mention the cultivar's name. -- Sam
> -----------------------------
>
> UW-River Falls Professor Develops Hardy Midwestern Plum   (Jan 16, 2004)
>
> Commercial plums from California now have a hardy Midwestern cousin. 
> University of Wisconsin-River Falls plant breeder Dr. Brian R. Smith has 
> developed a plum cultivar that stands up to Wisconsin's winters and 
> produces fruit to rival its sun-kissed kin.
>
> Smith, a professor of horticulture at UW-River Falls and a state commercial 
> fruit specialist with UW-Extension, created the new cultivar by crossing a 
> plum variety adapted to Wisconsin's frigid winters with a Japanese dessert 
> plum. The new hybrid yields fruit as large and tasty as any 
> California-grown plum from the grocery store, he says, but also withstands 
> subzero temperatures and sports a more easily managed semi-dwarf growth 
> habit.
>
> He hopes one day to see plums join apples, cherries, and strawberries as a 
> commercial Wisconsin fruit crop.
>
> "Commercial plum production is almost non-existent in the state right now 
> primarily because most of your higher quality plums aren't winter hardy, 
> bloom too early in the spring, and require long growing seasons," says 
> Smith. "The goal of my breeding program has been to develop commercial plum 
> cultivars for growing in this climate."
>
> To protect the plum cultivar and facilitate its commercialization, a patent 
> application has been filed by WiSys.
>
> Besides boasting the most extensive fruit breeding program in the UW 
> System, UW-River Falls also hosts the only plum breeding project in a 
> 24-state surrounding area. Yet when Smith launched the endeavor in 1991, no 
> one had bred plums in the Midwest for over 55 years. To find a source of 
> winter-hardy genetic stock to blend with conventional California-grown 
> varieties, Smith therefore looked to cultivars developed 100 years ago by 
> pioneering plum breeders and planted by homesteaders on family farms. Other 
> sources of germplasm came from wild plum varieties.
>
> One type of plum he selected for his breeding experiments was the cherry 
> plum, a hybrid whose lineage includes wild plum species adapted to northern 
> climes. The cultivar Smith is patenting through WiSys is a cross between a 
> cherry plum and a conventional California dessert plum.
>
> To develop new cultivars, Smith has at his disposal a collection of 350 
> potted plum trees he maintains at UW-River Falls. After selecting the trees 
> he wants to interbreed, he collects and stores pollen from each male parent 
> tree, transferring it eventually by hand to the flowers of each female 
> parent to achieve the desired hybridizations. If a plant bears fruit as a 
> result of his efforts, he collects its seeds and stores them under 
> conditions that simulate winter, a process called stratification.
>
> After stratification, the seeds begin to germinate. Smith plants the 
> seedlings in pots and begins growing them in a greenhouse, transferring 
> them the following summer to the field. He then waits patiently - anywhere 
> from two to 12 years - for the plants to mature and produce fruit. Many 
> seedlings never do, succumbing instead to the ravages of Wisconsin's 
> climate.
>
> Once the survivors reach maturity, Smith evaluates them for fruit size and 
> quality, winter hardiness, resistance to disease, and yield, among other 
> traits. If a tree performs well, he propagates it by budding or some other 
> asexual cloning method. If these cloned plants continue to do well, he 
> finally considers the tree as a candidate for cultivar status and possible 
> commercial production.
>
> The plum cultivar being patented by WiSys has been under development for 
> about 10 years; in addition, another 10 potential cultivars are "looking 
> pretty good," says Smith, although he's not ready to release them. The next 
> step for his first plum cultivar will be a round of testing by commercial 
> growers under their own field conditions. Smith is also testing various 
> methods for asexually propagating the cultivar in collaboration with 
> UW-Madison horticulture professor Brent McCown.
>
> Eventually plum trees could be grown commercially in several areas of the 
> state, Smith says, especially in more temperate places such as the Door 
> County peninsula where cherries are now grown, or on high bluffs, less 
> prone to frost, where farmers currently plant apple trees. "Although, as we 
> develop more frost resistance into these varieties, site selection will 
> become less of an issue," he adds.
>
> Only time will tell if Smith's breeding experiments bear fruit for the 
> Midwest's farm economy, but that is the ultimate goal. "My research is a 
> long-term investment in the health of Wisconsin's and the Midwest's ag 
> sectors," he says. "My hope is that plums will someday be a crop that helps 
> farmers diversify their operations, improve their profitability and stay 
> competitive.
>
> "Consumers deserve high quality dessert plums," he adds, "rather than the 
> typical low-grade plums shipped here from the Southwest - less fresh by 
> 1500 miles."
>
> Copyright © 2004 WiSys Technology Foundation, Inc.
> Powered by IMS <http://www.ims.net>
>
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--
Thomas Olenio
Ontario, Canada
Hardiness Zone 5b