Grapevine cv. ‘Sugratwentyone’

Details Grapevine cv. ‘Sugratwentyone’ Grapevine cv. ‘Sugratwentyone’

2001-01-25

2002-12-31

Campell, Bruce R. (Department: 1661)

Plants

Fruit

Grape

Plant Patent

active

PP013444

ABSTRACT:

BACKGROUND AND SUMMARY OF THE INVENTION
This invention relates to the discovery and asexual propagation of a new variety of grapevine,
Vitis vinifera
cv. ‘Sugratwentyone’. The new variety was first hybridized by David W. Cain in Wasco, Kern County, Calif., the variety being originated by controlled bybridization and subsequent ovule culture of normally abortive seeds. The new ‘Sugratwentyone’ variety is characterized by producing large clusters of red, naturally large seedless berries that are uniform, crisp and round.
The seed parent is ‘Sun World Breeding Selection 90089-165-268’ (nonpatented). The pollen parent is ‘Sun World International Breeding Selection 90227-127-008’ (nonpatented). The parent varieties were first crossed in May, 1993, with the date of first flowering being May, 1995. The new ‘Sugratwentyone’ variety was first asexually propagated by David W. Cain in December, 1995, near Wasco, Kern County, Calif., using hardwood cuttings.
The new grapevine variety cv. ‘Sugratwentyone’ differs from its seed parent by producing larger, more nearly round light red berries (as compared to the smaller, reddish-black berries of the seed parent) that ripen approximately one month later. ‘Sugratwentyone’ differs from its pollen parent by producing berries that are rounder and light red in color, in comparison to the oval, black berries of the pollen parent.
The new variety cv. ‘Sugratwentyone’ can be distinguished from commonly grown grape varieties such as the ‘Redglobe’ (U.S. Plant Pat. No. 4,787) and the ‘Flame Seedless’ (nonpatented) by possessing large clusters of red seedless berries that are crisp and uniform. The berries of the new ‘Sugratwentyone’ variety color with some difficulty in hot conditions, and are prone to bunch rot due to a combination of thin skin and a slightly compact cluster structure. Moreover, the berries of ‘Sugratwentyone’ are naturally very large, being among the largest of known seedless grapes. Manipulation by either gibberellic acid or girdling produces berries that are even larger. The berries are strongly attached to the cluster, mainly due to increased lignification of the peduncle, rachis, pedicel, and torus.
‘Sugratwentyone’ most nearly resembles the ‘Redglobe’ variety, but is distinguished from ‘Redglobe’ by forming berries that are slightly smaller and contain small, vestigial seed remnants as compared to the ‘Redglobe’ variety. The new variety cv. ‘Sugratwentyone’ remotely resembles the ‘Flame Seedless’ variety, but produces berries that are naturally much larger, ripening about six weeks after the ‘Flame Seedless’ variety.
The new ‘Sugratwentyone’ variety has been shown to maintain its distinguishing characteristics through successive asexual propagations by, for example, cuttings.


REFERENCES:
patent: PP4787 (1981-11-01), Olmo et al.

Affiliated with

Also associated with

Rating

Grapevine cv. ‘Sugratwentyone’ does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Grapevine cv. ‘Sugratwentyone’, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Grapevine cv. ‘Sugratwentyone’ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2932689