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Nematode resistant grape rootstock `8909-05`

a technology of nematode resistance and grape rootstock, which is applied in the field of nematode resistance grape rootstock, can solve the problems of large restrictions on the use of pesticides, inability to meet the needs of agricultural production, etc., and achieves strong and broad nematode resistance, strong resistance to xiphinema index, and resistance to grape phylloxera.

Active Publication Date: 2009-05-12
RGT UNIV OF CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003]This invention relates to a new and distinct variety of grape rootstock with resistance to a broad array of soil-borne nematodes including root-knot, dagger, citrus, lesion, and ring nematodes. The variety also resists grape phylloxera. The variety is a cross of Vitis rupestris ‘A. de Serres’×Muscadinia rotundifolia ‘Cowart’. The variety is recommended for vineyard sites with severe nematode infestations.
[0004]Rootstock ‘8909-05’ is one of the rare sources of resistance to ring nematode. This plant has extremely strong and broad nematode resistance. ‘8909-05’ may also possess the same ability to control fanleaf degeneration that ‘O39-16’ does. ‘O39-16’ has strong resistance to Xiphinema index, the dagger nematode that vectors grapevine fanleaf virus (GFL

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 `8909-05`
  • Nematode resistant grape rootstock `8909-05`

Examples

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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 the ‘8905-05’ and other crosses are listed in Table 1. About 5,000...

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Abstract

Rootstock ‘8909-05’ is a cross of Vitis rupestris ‘A. de Serres’×Muscadinia rotundifolia ‘Cowart’. This invention relates to a new and distinct variety of grape rootstock with resistance to a broad array of soil-borne nematodes including root-knot, dagger, citrus, lesion, and ring nematodes. The rootstock also resists grape phylloxera. Rootstock ‘8909-05’ is one of the rare sources of resistance to ring nematode. The rootstock has extremely strong and broad nematode resistance.

Description

[0001]Botanical / commercial classification: Vitis rupestris ‘A. de Serres’×Muscadinia roundifolia ‘Cowart’. Variety Denomination: ‘8909-05’.BACKGROUND OF THE INVENTION[0002]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 selected for nematode resistance. The grape rootstock...

Claims

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Application Information

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IPC IPC(8): A01H5/00
CPCA01H5/0812A01H6/88
Inventor WALKER, ANDREWEVERIST, KIMOLMO, HAROLD P.
Owner RGT UNIV OF CALIFORNIA
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