Apple tree rootstock named ‘G.814’

Abstract

The present invention relates to a new and distinct variety of apple tree named ‘G.814’. ‘G.814’ is useful in that it can be propagated clonally and used as a rootstock or root system for apple trees as well as for interstems of apple trees. When used as a rootstock, ‘G.814’, is: dwarfing, induces scion precocity, is cold hardy, induces scion precocity, has a high yield efficiency, is tolerant to replant disease, and is resistant to: crown and root rot (Phytophthora cactorum), fire-blight (Erwinia amylovora), and powdery mildew. ‘G.814’ is susceptible to Apple Stem Grooving Virus (ASGV) and wooly apple aphid.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0001]This invention was made with United States government support under a United States Department of Agriculture-Agricultural Research Station Cooperative Research and Development Agreement, Sponsor's Contract Number 58-3K95-M-1031. The government has certain rights in the invention.[0002]Genus and species: Malus domestica×Malus robusta hybrid.[0003]Variety denomination: ‘G.814’.BACKGROUND OF THE INVENTION[0004]I. Field and Utility Summary[0005]The invention described herein is a new variety of apple tree, Malus domestica×Malus robusta hybrid, hereinafter referred to as ‘G.814’. The new variety is useful as a dwarfing rootstock and is resistant to fire blight and crown rot. It is precocious and highly productive, and can be used as a rootstock and for interstems of apple trees.[0006]II. Cultivation Summary[0007]‘G.814’ originated from a planned cross in 1976 in Geneva, N.Y.[0008]In the spring of 1976, pollen from a Ma...

AI Technical Summary

Benefits of technology

[0024]The seed parent Malus domestica ‘Ottawa 3’ is a dwarfing rootstock; trees grown on this rootstock are 30 to 35 percent the size of a standard self-rooted seedling tree. ‘Ottawa 3’ is known to induce good precocity to the scion (induces early reproductive development in the scion) and has high yield efficiency. ‘Ottawa 3’ plants produce no spines, are fairly well anchored, are a very cold hardy rootstock, and have resistance to crown and root rot caused by Phytophthora cactorum. However, ‘Ottawa 3’ is susceptible to the wooly apple aphid (Eriosoma lanigerum) and to fire blight (Erwinia amylovora). ‘Ottawa 3’ has been characterized as susceptible to ASGV.

[0029]‘G.814’ is similar to ‘Ottawa 3’ in that they share dwarfing properties, induce precocity to the scion, and are: yield efficient, cold-hardy, susceptible to ASGV, and resistant to crown and root rot caused by Phytophthora cactorum.

[0032]‘G.814’ is similar to ‘Robusta 5’, in that they share these properties: cold hardiness, resistance to fire blight, resistance to wooly apple aphid, resistance to powdery mildew, and tolerance of replant disease.

[0034]‘G.814’ is distinguished from ‘M.26’ in that ‘G.814’ is resistant to fire blight and tolerant of replant disease, whereas ‘M.26’ is not resistant to fire blight or tolerant of replant disease. ‘G.814’ exhibits finer, more branched root system than ‘M.26’ roots, resulting in higher exploration of the soil profile.

[0035]‘G.814’ is similar to ‘M.26’ in that they share these properties: dwarfing, scion precocity induction, and high yield efficiency.

[0037]The ‘G.814’ apple tree is distinguished from ‘Robusta 5’, ‘Ottawa 3’, and ‘M.26’ in that ‘G.814’ has this combination of characteristics when used as a rootstock: dwarfing, induces scion precocity, high yield efficiency, fire-blight resistance, and replant disease tolerance.

Problems solved by technology

These results indicated that this rootstock is susceptible to ASGV.

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