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Nematode resistant grape rootstock ‘9365-43’

a technology of grape rootstock and nematode, which is applied in the field of nematode resistant grape rootstock, can solve the problems of large restrictions on the use of soil-borne pesticides, inability to meet the needs of nematode resistance, and inability to meet the needs of nematode resistance, and achieves strong resistance to grape phylloxera

Active Publication Date: 2009-06-02
RGT UNIV OF CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a new type of grape rootstock that can resist many types of soil-borne nematodes, including root-knot, dagger, lesion, and citrus nematodes. It is also susceptible to ring nematode, but has strong resistance to grape phylloxera. This variety is a cross of several different grape species and is recommended for vineyard sites with severe nematode infestations.

Problems solved by technology

Nematodes are important pests in vineyards around the world, and these soil-borne pests can be particularly problematic in California vineyards.
Nematicides and fumigants help control nematodes, but the use of these pesticides has been greatly restricted and their future use in doubt because they must be persistent and penetrate deeply through the soil profile to be highly effective.
In addition, grape rootstocks were bred to resist grape phylloxera (a devastating root-feeding aphid), and were not selected for nematode resistance.
The grape rootstocks ‘Freedom’ and ‘Harmony’ were released by the USDA / Fresno to provide resistance to nematodes, but they are not resistant to grape phylloxera.

Method used

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  • Nematode resistant grape rootstock ‘9365-43’
  • Nematode resistant grape rootstock ‘9365-43’

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Embodiment Construction

[0007]A breeding program was initiated in 1990 at UC Davis to provide a group of rootstocks with broad and durable resistance to the nematodes found in California vineyards. This program commenced with an evaluation of selections that remained from breeding efforts in the late 1960s and early 1970s. These selections from the late 1960s and early 1970s were previously screened against two root knot nematode species (Meloidogyne incognita acrita and M. arenaria thamsei), the lesion nematode (Pratylenchus vulnus), and the dagger nematode (Xiphinema index). In 1990, these selections were evaluated for their ability to root and for growth habits such as brushy growth, internode length and the degree of lateral shoot production. In 1993 and 1994, the best of these selections were crossed to species chosen for their ability to reduce scion vigor or improve the rooting of the progeny. The parentage and species composition of ‘9363-16’ and other crosses are listed in Table 1. About 5,000 pro...

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Abstract

Rootstock ‘9365-43’ is a cross of ‘L514-10’ (Vitis rufotomentosa×(V. champinii ‘Dog Ridge’×V. riparia ‘Riparia Gloire’))×V. champinii ‘c9038’. The rootstock is a new and distinct variety of grape rootstock with resistance to a broad array of soil-borne nematodes including root-knot, dagger, lesion and citrus nematodes. The rootstock is susceptible to ring nematode, but has strong resistance to grape phylloxera.

Description

[0001]Botanical / commercial classification: ‘L514-10’ (Vitis rufotomentosa×(V. champinii ‘Dog Ridge’×V. riparia ‘Riparia Gloire’))×V. champinii ‘c9038’.[0002]Variety denomination: ‘9365-43’.BACKGROUND OF THE INVENTION[0003]Nematodes are important pests in vineyards around the world, and these soil-borne pests can be particularly problematic in California vineyards. Two factors intensify the impact of nematodes—the high value of grapes and of vineyard land. These factors force growers to ignore the steps of leaving land fallow and rotating crops, both of which reduce nematode build up and delay the selection of adapted strains. Nematicides and fumigants help control nematodes, but the use of these pesticides has been greatly restricted and their future use in doubt because they must be persistent and penetrate deeply through the soil profile to be highly effective. In addition, grape rootstocks were bred to resist grape phylloxera (a devastating root-feeding aphid), and were not selec...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A01H5/00A01H5/08
CPCA01H5/0812A01H5/08A01H6/88
Inventor WALKER, ANDREW
Owner RGT UNIV OF CALIFORNIA
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