Grapevine plant named `M 48-42`

Abstract

A new and distinct variety of diploid grapevine is provided which abundantly forms early-ripening juicy relatively large bunches of small substantially spherical berries that develop an intense black-purple coloration upon maturity. A propensity for high stenospermocarpic fruit production is displayed. Superior resistance to downy mildew and powdery mildew has been observed during evaluations to date. The plant is particularly well suited for the production of dried currants. The fruit also can be used in the table grape market or be used to make wine or grape juice.

Description

[0001]Botanical / commercial classification: Vitis hybrida / Grapevine.[0002]Varietal denomination: cv. M 48-42.BACKGROUND OF THE VARIETY[0003]The new diploid grapevine variety of the present invention was created during the course of a grapevine breeding program that was carried out in Australia wherein two parents were crossed which previously had been studied in the hope that they would contribute the desired characteristics. The female parent (i.e., seed parent) was the complex hybrid Vitis spp. ‘39-639 Seyve-Villard’ variety (non-patented in the United States). Such female parent is listed in Galet, P., “Cépages et vignobles de France, Tome I Les Vignes Américaines” (1988) as being an early-maturing, disease resistant white-berried interspecific hybrid of unknown origin. The female parent was chosen as a seed parent primarily in view of its resistance to mildew diseases, such as downy mildew and powdery mildew. The male parent (i.e., pollen parent) was the ‘Beauty Seedless’ variety...

AI Technical Summary

Benefits of technology

The patent text describes the characteristics of a new variety of plant, which are shown in color illustrations. The photos include typical vine growth habit, inflorescence, shoot tips, tendrils, young shoots, mature leaves, and berry clusters. The text also mentions the dimensions of the plants in millimeters for comparison purposes. The technical effect of the patent is to provide a detailed description of the new variety of plant that can be used in breeding and genetic research.

Problems solved by technology

More specifically, the grapes of the ‘39-639 Sayve-Villard’ variety are larger, possess seeds, are unsuitable for drying to produce currants, and are borne in smaller bunches.

The ‘Beauty Seedless’ variety forms larger black berries that are unsuitable for drying to produce currants, and is considerably more susceptible to downy mildew and powdery mildew.

Images