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Scarlet Royal grapessweet and firm, with a
pleasing dark-red color. Click the image for more information about
"Scarlet Royal" Grapes: Delicious!
By Marcia Wood
April 7, 2006
If you love sweet, firm grapes, you'll
want to try Scarlet Royal red seedless from Agricultural Research Service (ARS) grape breeders in California.
Young vines that will yield this delicious, oval-shaped grape already
flourish in sunny vineyards in California, the nation's largest producer of
fresh-market, wine and raisin grapes. And though Scarlet Royal vines won't be
ready to harvest for another few years, their luscious grapes are well worth
That's according to ARS horticulturist
W. Ramming and colleague
E. Tarailo, who developed Scarlet Royal and tested it for 10 years before
determining, in 2005, that it was ready for commercial vineyards. They received
a U.S. patent for the grape in January 2006.
Ramming and Tarailo are with ARS'
Joaquin Valley Agricultural Sciences Center at Parlier, Calif., about 200
miles north of Los Angeles.
Scarlet Royal grapes have attractive, dark-red skin and translucent, pale
yellow-green flesh. By ripening in mid-August, the grapes help fill the gap
between the earlier-ripening Flame Seedless, America's favorite red seedless
grape, and the later-ripening Crimson Seedless.
Scarlet Royal, Flame Seedless and Crimson Seedless have all resulted from
ARS' grape-breeding program in California, now in its 83rd year.
One of the newer grapes from the team, Scarlet Royal likely wouldn't exist
were it not for an exacting laboratory procedure called embryo rescue. Ramming
pioneered the application of this technology for breeding seedless grapes.
The approach requires excising the tiny, wisp-like embryo from inside a
promising seedless grape, then nurturing it with special nutrients, in petri
dishes, to form a little seedling.
In nature, when two seedless grape plants are chosen as parentsas was
the case for Scarlet Royaltheir offspring usually produce grapes with
embryos so minuscule that they can't survive without the help of embryo rescue
more about the research in the April 2006 issue of Agricultural Research
ARS is the U.S. Department of
Agriculture's chief scientific research agency.