Patent Grant
PP27533
Classification: The present invention relates to a new Vitis vinifera Grapevine.
Variety denomination: The new Grapevine has the varietal denomination ‘ARRATHIRTYTWO’.
A breeding program was initiated during the late 1990's near Bakersfield in the San Joaquin Valley of Central California. In 2008, during this breeding program, a new variety of Vitis vinifera was created by deliberate cross breeding of two parent plants by emasculation of the pollen bearing organ of the female and introducing pollen from another male origin. The female parent of the new variety was BAR1 which is a medium-sized black seedless grape variety with a crisp texture and a natural flavor (non-patented in the United States). The male parent (i.e. the pollen parent) of the new variety was 35-22+4, a mid-season, black variety with a meaty and juicy texture (non-patented in the United States).
Comparison of ‘ARRATHIRTYTWO’ with its parents:
The parentage of the new variety can be summarized as follows:
BAR1×35-22+4
An artificial pollination was created, and the result was an embryo which possessed unique genetic qualities. The rudiments resulting from the above pollination were embryo rescued.
In 2010 the plant was transplanted to Bakersfield in the San Joaquin Valley of Central California.
It was found that the new grapevine of the present invention possesses the following combination of characteristics:
(a) forms attractive large firm seedless berries with a black skin coloration; in medium-to-large clusters which display a naturally sweet flavor;
(b) commonly bears fruit during the month of August in the San Joaquin Valley of Central California, U.S.A.; and
(c) bears fruit that is firm and is well amenable for storage, handling, and shipping.
The new variety during observation to date has displayed no visible disease, and has displayed an ability to well resist cold, drought, heat; but sensitive to direct exposure to sun and wind. The fruit of the new variety has been found to display excellent handling and shipping qualities combined with desirable dessert eating qualities.
The new variety of the present invention has been found to undergo asexual propagation beginning in 2010 near Bakersfield in the San Joaquin Valley of Central California, U.S.A. by grafting on mature Thompson rootstock (non-patented in the United States). Such asexual propagation has been conducted thereafter in successive years through 2011, and has shown that the characteristics of the new variety are strictly transmissible from one generation to another. Accordingly, the new variety undergoes asexual propagation in a true to type manner.
The new variety ‘ARRATHIRTYTWO’ is a large size, black seedless table grape with a medium-high production, e.g., about 48 bunches per vine, and an average of about one to two bunches per shoot.
Asexual reproduction by micro propagation of the new variety as performed near Bakersfield, Calif., U.S.A., shows that the forgoing and other distinguishing characteristics come true to form and are established and transmitted through succeeding propagations.
The accompanying photographic illustration shows typical specimens of vegetative growth of six year old specimens of the new variety, in color as nearly true as it is reasonably possible to make in a color illustration of this character. Colors in the photograph may differ from the color values cited in the detailed botanical description below, which accurately describes the colors of the new Grapevine.
The chart used in the identification of colors is The R.H.S. Colour Chart of The ROYAL HORTICULTURAL SOCIETY 1995 edition. The description is based on the observation of plants growing on ‘Thompson Seedless’ rootstock outdoors near San Joaquin Valley of Central California, U.S.A.
To further characterize the new ‘ARRATHIRTYTWO’ variety DNA was extracted from dried leaf samples and DNA profiles were obtained at California Seed & Plant Lab, California USA using base pairs for 8 standard microsatellite DNA markers. The data is presented hereafter.
The ‘ARRATHIRTYTWO’ variety has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotypic expression may vary somewhat with changes in light intensity and duration, cultural practices, and other environmental conditions.
