Cultivar Name: |
Controller 6
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Type |
Peach Rootstock |
Synonyms |
'HBOK 27', '94-94-27'
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Patent |
The Regents of the University of California, Oakland, CA (US); The United States of America, As Represented By The Secretary of Agriculture, Washington, DC (US) 2013 PP23631
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Parentage |
`OP-F2` plant from an F1 plant of Prunus persica cv.‘Harrow Blood’ (HB) × cv. ‘Okinawa’ (OK)
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Species |
Prunus persica
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Usage |
Rootstock
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Scion Vigor Influence |
medium
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Resistance Traits |
Moderate resistance to root knot nematode (slightly less than that of the standard rootstock ‘Nemaguard’)
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Graft Compatibility |
Is adapted to regions such as California, and can be used as a rootstock for dessert peach, canning peach, almond, apricot, and Japanese plum (Prunus salicina Lindl.).
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Propagation Notes |
Leafy cuttings, hardwood cuttings and tissue culture.
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Propagation Method |
Vegetative
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Suckering |
Low
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Description |
Inventors: Fredrick A. Bliss, Davis, CA (US); Ali
A. Almehdi, Davis, CA (US); Theodore
M. DeJong, Davis, CA (US); Craig A.
Ledbetter, Clovis, CA (US); UC Rootstock Breeding Program
The ‘HBOK 27’ peach rootstock of the present invention is an ‘OP-F2’ plant from an F1 plant of an intraspecific hybrid between two peach parents that has size control ability, moderate root knot nematode resistance, less wood from dormant and summer pruning, and produces fewer root suckers.
When used as a clonally-produced rootstock with fresh market peach (‘O’Henry’) scions, ‘HBOK 27’ showed size reduction of compound trees and no evidence of graft incompatibility or other abnormalities. Five year-old compound trees with ‘HBOK 27’ rootstock had 45 % smaller trunk cross-sectional area (TCA) than with the standard rootstock ‘Nemaguard’. The compound trees with ‘HBOK 27’ rootstock also had approximately 50% to 60% less wood from summer and winter pruning, and had fewer root suckers than ‘Nemaguard’. Although crop yield per tree usually was less than on ‘Nemaguard’ rootstock, the compound trees with ‘HBOK 27’ rootstock that were smaller generally showed greater cropping efficiency. The ability to plant smaller trees at greater density in commercial fields provides an opportunity to recover economically viable yields per unit area.
Compound plants with ‘HBOK 27’ rootstocks provide an opportunity for growers to develop new management practices that utilize the potential of these rootstocks to lower costs through size reduction, reduced pruning and less need for sucker control. |
References |
- United States Patent and Trademark Office
- UCANR, Kearney News Update: Dwarfing rootstocks developed at Kearney cut peach farming expenses; Link
- California Tree Fruit Agreement (CTFA2010_152.pdf-92539.pdf); Link
- University of California Fruit Report, California Rootstock Breeding Program; Link
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