Thomson navel orange (CRC 969)
Citrus sinensis (L.) Osbeck
Photos by David Karp and Toni Siebert, 1/28/2010, CVC. Photo rights.
Source: Received as budwood from USDA #2--thru A.D. Shamel, Riverside, Calif., 1916.
Parentage/origins: Thomson and T.I. or Thomson Improved navel orange selections. Thomson was one of the bud sport selections made from Washington navel on the property of A. C. Thomson in Duarte, Ca, about 1891. Thomson was planted extensively for years because the fruit matured approximately two weeks earlier than the Washington navel orange fruit.
Rootstocks of accession: Carrizo citrange, C-35 citrange
Season of ripeness at Riverside: November to January
Notes and observations:
The fruit is a bit more elongated in shape and has thinner and smoother rind than the Washington navel. The juice vesicles are ricier in texture and less distinct. Although Thomson fruit mature earlier than Washington navel fruit, they do not hang well on the tree and are inferior to the Washington navel orange in all other respects. There are two Thomson selections available through the CCPP, Thomson Sheldon (VI 425) and Thomson Zimmerman (VI 424).
Description from The Citrus Industry Vol. 1 (1967):
"Fruit medium-large, globose to slightly obovate or ellipsoid; occasionally with collar and commonly with two or three relatively deep and long radial basal furrows; apex usually protruded or broadly nippled or with large open navel; seedless. Less well-colored than Washington. Rind medium-thin and surface smooth and glossy though finely pitted. Flesh well-colored with firm texture; medium juice content; flavor good. Holds on the tree poorly with rapid loss in quality. Very early in maturity (10 days or more in advance of Washington).
Availability: Not commercially available in California.
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