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Publication numberUSPP10435 P
Publication typeGrant
Application numberUS 08/747,406
Publication dateJun 9, 1998
Filing dateNov 12, 1996
Priority dateNov 12, 1996
Publication number08747406, 747406, US PP10435 P, US PP10435P, US-P-PP10435, USPP10435 P, USPP10435P
InventorsDouglas V. Shaw
Original AssigneeThe Regents Of The University Of California
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Strawberry plant `Diamante`
US PP10435 P
`CN210` is a new and distinct cultivar of strawberry plant of the day-neutral type which is more vigorous than `Selva` or `Seascape` and requires less chilling to maintain excellent fruit quality. When treated with appropriate planting regimes, `CN210` has much larger fruit and produces greater yields than the comparison cultivars.
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I claim:
1. The new and distinct cultivar of strawberry plant substantially as herein described and illustrated.

This invention relates to a new and distinctive day-neutral type cultivar designated as `CN210` also known as `Diamante`, which resulted from a cross performed in 1991 between advanced selections Cal 87.112-6 and Cal 88.270-1. The cultivar is botanically identified as F.×ananassa Duch.

`CN210` was first fruited at the University of California Wolfskill Experimental Orchard, near Winters, Calif. in 1992, where it was selected, originally designated Cal 91.248-6, and propagated asexually by runners. Following selection and during testing the plant of this disclosure was designated `CN210`. With the decision that this plant was to be released, it was given the name `Diamante` for the purposes of introduction into commerce and for international registration and recognition. Asexual propagules from this original source have been tested at the Watsonville Strawberry Research Facility, the South Coast Research and Extension Center, and to a limited extent in grower fields starting in 1994.


FIG. 1 depicts the general flowering and fruiting characteristics of the plant.

FIG. 2 depicts a typical mature leaf during late spring.

FIG. 3 depicts representative mid-season fruit.


`CN210` is moderate to weak in expressing the day-neutral character, being a stronger day-neutral than `Seascape` (U. S. Plant Pat. No. 7,614), comparable or slightly more day-neutral than `Selva` (U.S. Plant Pat. No. 5,266), and less so than `Fern` (U. S. Plant Pat. No. 5,267) or `Irvine` (U.S. Plant Pat. No. 7,172). The production pattern for `CN210` is similar to that for `Selva` or `Seascape`, and will be of special interest for winter plantings, where `Selva` and `Seascape` have been successful and summer plantings where `Seascape`, has been successful.

Plants and Foliage

Fruiting plants of `CN210` are more erect and usually more vigorous than plants of `Selva` or `Seascape`, but also are more open and compact. With appropriate treatment, plant size for `CN210` is similar to `Selva`, and slightly smaller than `Seascape`. Comparative statistics for foliar characters near mid-season are given for the three cultivars in Table 1. Leaflets are similar in size but substantially more rounded than leaves of `Selva` or `Seascape`. Leaves including petioles are somewhat shorter and broader than the comparison cultivars. Petioles are much thicker and more stiff than those of `Selva` and `Seascape`. `CN210` has variable leaf convexity, generally more concave than leaves of `Selva`, and has fewer and more rounded serrations than the comparison cultivars. The adaxial (upper) leaf surface for `CN210` is darker and more glossy than for `Selva` and similar to `Seascape`, whereas the abaxial surface is slightly lighter than either comparison cultivar (Table 2).

Isozymes in Leaf Extracts

`CN210` has been classified for three isozyme systems using starch gel electrophoresis (Table 3): Phosophoglucoisomerase (PGI), Leucine Aminopeptidase (LAP), and Phosphoglucomutase (PGM). It is distinguishable from `Selva` but not from `Seascape` using this methodology. For electrophoretic procedures see: J. Amer. Soc. Hort. Sci. 106:684-687.

Disease and Pest Reaction

`CN210` is moderately susceptible to common leaf spot (Ramularia tulasnei), Verticillium wilt (Verticillium dahliae), and Anthracnose crown rot (Colletotrichum acutatum), and is relatively resistant to powdery mildew (Sphaerotheca macularis). When treated properly, it has tolerance to two-spotted spidermites (Tetranychus urticae) greater than `Seascape` and `Selva`. `CN210` is tolerant to strawberry viruses encountered in California.

Flowering, Fruiting, Fruit, and Production Characteristics

`CN210` is similar to other California day-neutral cultivars (e. g. `Selva` and `Seascape`) in that it will flower independently of day length, given appropriate temperature and fertility conditions. Comparative statistics for flower and fruit characters near mid-season are given for the three cltivars in Table 4. The primary flowers for `CN210` are similar in size to `Selva` and `Seascape`; the sepals are somewhat smaller than for `Seascape` and substantially larger than for `Selva`. The calyx for `CN210` varies from slightly indented to even, and each primary flower has 5-6 petals. The fruit shape for `CN210` can vary but is typically a long rounded conic, and is easily distinguished from other California day-neutral cultivars. External and internal fruit color for `CN210` are substantially lighter than for `Selva` and `Seascape`, and fruit is substantially more glossy than either comparison cultivar (Table 2). Achenes vary from yellow to red, and are slightly indented.

`CN210` has been tested under a variety of cultural regimes, and optimal performance is obtained when nursery treatments and nutritional programs similar to those for `Selva` and `Seascape` are used. In general, `CN210` is more vigorous than the comparison cultivars and requires less chilling to maintain excellent fruit quality. `CN210` retains good fruit quality in summer planting systems, similar to `Seascape`.

When treated with appropriate planting regimes, `CN210` has much larger fruit and produces greater yields than `Selva` or `Seascape` (Table 5). Production for `CN210` initiates at dates similar to the comparision cultivars and it produces slightly larger quantities of late-season fruit. Commercial appearance ratings have been superior to those for the comparison cultivars. Fruit firmness is similar to that for `Selva` and greater than that for `Seascape`. Subjectively, `CN210` has excellent flavor, substantially better than `Selva` or `Seascape`. The fruit will be outstanding for both fresh market and processing, and will be useful for home garden purposes.

              TABLE 1______________________________________Foliar characteristics for `CN210`, `Selva` and`Seascape`.Foliar      CultivarCharacter   `Selva`    `Seascape` `CN210`______________________________________Mid-tier leafletLength (mm)mean        72.6       72.8       64.9range       65-88      65-82      57-72Width (mm)mean        68.2       64.5       68.4range       51-84      48-78      63-76Mid-tier leafLength (mm)mean        119.2      123.8      117.9range       94-139     80-155     89-145Width (mm)mean        130.1      127.1      124.7range       111-170    108-150    115-139#           3          3, rarely 4                             3leaflets/leafLeaf convexity       mostly flat to                  concave to concave to       convex     convex, mostly                             convex, mostly                  flat to convex                             flatSerrationsnumber      few-moderate                  moderate   moderateshape       round to   semiround to                             rounded to       semipointed                  semipointed                             semipointedLeaf        moderate   moderate   moderatepubescencePetiole pubescencedensity     heavy      mod. to heavy                             heavydirection   perpendicular                  perp to slight                             perpendicular                  acropetal______________________________________

              TABLE 2______________________________________Foliar and fruit color characteristics for`CN210`, `Selva`, and `Seascape`Color          CultivarCharacter      `Selva`   `Seascape`                              `CN210`______________________________________Leaf color (CIELAB)AdaxialL*mean           31.9      29.1      30.4range          30.2-33.7 26.9-32.3 28.4-32.1a*mean           -6.5      -5.1      -6.5range          -5.8--7.2 -2.4--6.6 -6.3--6.7b*mean           12.7      11.3      11.1range          9.8-15.8  9.5-16.5  9.7-14.0Munsell        2.5G 3/3  2.5GY 4/3 2.5GY 5/5AbaxialL*mean           48.3      48.3      50.3range          47.2-50.4 47.0-49.6 48.8-51.7a*mean           -7.7      -7.2      -8.0range          -7.3--8.3 -6.3--8.0 -7.7--8.3b*mean           -17.9     18.1      18.2range          16.7-19.4 16.7-19.0 16.0-19.6Munsell        7.5GY 4/4 10GY 4/5  7GY 4/4Fruit color (CIELAB)ExternalL*mean           28.5      25.4      29.4range          23.7-33.1 22.7-31.5 25.9-31.7a*mean           29.7      28.7      36.2range          26.9-31.5 25.4-33.1 32.8-39.2b*mean           16.9      13.7      20.7range          14.4-22.1 9.3-19.8  16.7-27.0Munsell        5R 4/12   5R 3/7    7.5R 5/13                    5R 4/12InternalL*mean           48.8      45.5      61.2range          44.4-53.1 38.3-55.0 52.6-66.2a*mean           35.2      37.8      18.7range          31.5-39.5 30.8-42.7 13.5-31.3b*mean           29.4      26.9      16.4range          26.9-33.9 21.9-34.2 13.4-24.6Munsell        5R 5/13   7R 5/13   7.5R 8/6______________________________________ *CIELAB is the abbreviation of the international color system known as "Commission Internationale De L'Eclairage" 1978. Recommendations on uniform color spaces - color difference equations, psychometric color terms, Supplement No. 2 to CIE Publication No. 15. PARIS.

              TABLE 3______________________________________Isozyme phenotypes for `CN210`, `Selva`, and`Seascape`.   Cultivarlocus   `Selva`       `Seascape`                          `CN210`______________________________________PGI     A2            A4       A4LAP     B3            B3       B3PGM     C2            C2       C2______________________________________

              TABLE 4______________________________________Flower and fruit characters for `CN210`, `Selva`,and `Seascape`       CultivarCharacter   `Selva`    `Seascape` `CN210`______________________________________# petalsmean        5.8        6.1        5.1range       5-8        5-7        5-6Flower      even       most even  mostly exposedposition    or interior                  some interior(relative to           or exposedfoliage)Calyx diam. (mm)mean        29.0       35.7       34.3range       22-35      30-40      31-39Corolla diam. (mm)mean        37.5       35.7       33.0range       31-43      32-40      30-38Fruit shapelength/widthratio       1.16       1.15       1.18range       1.02-1.25  1.00-1.31  1.11-1.32subjective  conic to flat                  mostly sharp                             mostly rounded       conic      conic      conicCalyx position       even with  even/slight                             slight indent       shoulder   neckSeed position       even/slight                  slight indent                             slight indent       extrude    to slight                  extrude______________________________________

              TABLE 5______________________________________Performance of `CN210`, `Selva`, and `Seascape`evaluated at the Watsonville Research Facility in 1995 and 1996.All plants for these materials were harvested from Macdoel onOctober 16 or 17, and planted with three weeks supplementalstorage prior to planting. Harvest was initiated in early Apriland continued through the first week of October.(52" 2-row beds, 17,300 plants/acre,100 grams/plant = 316.3 crates/acre)           Late  Yield    Yield    Appearance                            SizeItem   (g/plant)           (g/plant)                    Score   (g/fruit)                                   Firmness______________________________________`Seava`  1,764    389      3.2     24.4   7.3`Seascape`  1,832    375      3.3     24.0   6.9`CN210`  2,035    440      4.1     30.7   8.1______________________________________ Late yield includes harvest from August 20 through October 10.

When `Diamante` is compared to `Aromas` (U.S. Plant patent application Ser. No. 08/747,506, filed Nov. 12, 1996), it is found that `Diamante` forms larger fruit that is lighter in coloration especially on interior fruit, and tends to be somewhat less productive.

U.S. ClassificationPLT/209
International ClassificationA01H5/08
Cooperative ClassificationA01H5/0893
European ClassificationA01H5/08R5
Legal Events
Apr 23, 1997ASAssignment
Effective date: 19970325
Effective date: 19970325