USPP6628P - Avocado tree called Thomas - Google Patents

Avocado tree called Thomas Download PDF

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Publication number
USPP6628P
USPP6628P US07/099,440 US9944087V US6628P US PP6628 P USPP6628 P US PP6628P US 9944087 V US9944087 V US 9944087V US 6628 P US6628 P US 6628P
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United States
Prior art keywords
thomas
avocado tree
resistance
variety
rootstock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/099,440
Inventor
Michael D. Coffey
Fred B. Guillemet
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University of California Berkeley
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University of California Berkeley
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Publication date
Application filed by University of California Berkeley filed Critical University of California Berkeley
Priority to US07/099,440 priority Critical patent/USPP6628P/en
Assigned to REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE, UNIVERSITY HALL (2199 ADDISON STREET) UNIVERSITY OF CALIFORNIA, BERKELEY, CA. 94720 A CORP. OF CA. reassignment REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE, UNIVERSITY HALL (2199 ADDISON STREET) UNIVERSITY OF CALIFORNIA, BERKELEY, CA. 94720 A CORP. OF CA. ASSIGN THE ENTIRE INTEREST SUBJECT TO CONDITIONS IN AGREEMENT RECITED Assignors: COFFEY, MICHEAL D., GUILLEMET, FRED B.
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H6/00—Angiosperms, i.e. flowering plants, characterised by their botanic taxonomy
    • A01H6/52—Lauraceae, e.g. avocado
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H5/00—Angiosperms, i.e. flowering plants, characterised by their plant parts; Angiosperms characterised otherwise than by their botanic taxonomy
    • A01H5/08—Fruits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45958—Plural distinct cavities or projections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45958—Plural distinct cavities or projections
    • Y10T24/45963—Hook type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45969—Hook-shaped projection member passing through cavity
    • Y10T24/45974—Hook-shaped projection member passing through cavity formed from single piece of sheet metal

Definitions

  • This invention relates to a new and distinct rootstock variety of avocado tree (Persea americana var. drymifolia) designated ⁇ Thomas ⁇ .
  • ⁇ Thomas ⁇ is a Mexican avocado tree recovered and asexually reproduced from the rootstock of a large Fuerte tree growing in Escondido, San Diego, Calif., which had been the subject of observations for root rot resistance.
  • ⁇ Thomas ⁇ has been tested at the University of California, Riverside and at South Coast Field Station, Irvine, Calif. for resistance to Phytophthora root rot caused by Phytophthora cinnamomi. It has also been tested for root rot resistance in various avocado groves in Southern California.
  • FIG. 1 shows the typical mature green fruit of the ⁇ Thomas ⁇ variety, prior to ripening.
  • FIG. 2 shows the general shape and leaf color of the ⁇ Thomas ⁇ selection.
  • ⁇ Thomas ⁇ has two primary characteristics that distinguish it. It has high field resistance to Phytophthora root rot. It is a Mexican variety and is well-adapted to California conditions.
  • ⁇ Thomas ⁇ has consistently proved to be a superior rootstock with respect to Phytophthora root rot resistance.
  • ⁇ Thomas ⁇ was evaluated as having the highest resistance among twelve selections tested. These selections included ⁇ Duke 7 ⁇ , ⁇ G755A ⁇ , ⁇ G755B ⁇ , and ⁇ Toro Canyon ⁇ which are currently available for commercial use.
  • ⁇ Thomas ⁇ as is the case with the majority of avocado varieties, does not have distinctive foliage. The leaves have a distinct anise scent when crushed, which typifies the Mexican horticultural race.
  • the following chart represents ratings of the ⁇ Thomas ⁇ variety compared with other root rot resistant varieties according to observations made at the Goleta Ranch Test Plot on May 30, 1985.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physiology (AREA)
  • Botany (AREA)
  • Developmental Biology & Embryology (AREA)
  • Environmental Sciences (AREA)
  • Natural Medicines & Medicinal Plants (AREA)
  • Cultivation Of Plants (AREA)

Abstract

A new and distinct rootstock variety of avocado tree characterized by its high field resistance to Phytophthora root rot caused by Phytophthora cinnamomi. This variety has the highest level of resistance of any rootstock currently identified. It is characterized by relative ease of propagation using the etiolation method and graft compatibility with commercial scion varieties, including 'Hass', 'Gwen' 'Pinkerton', 'Fuerte', 'Bacon' and 'Zutano'.

Description

DESCRIPTION
This invention relates to a new and distinct rootstock variety of avocado tree (Persea americana var. drymifolia) designated `Thomas`.
`Thomas` is a Mexican avocado tree recovered and asexually reproduced from the rootstock of a large Fuerte tree growing in Escondido, San Diego, Calif., which had been the subject of observations for root rot resistance. `Thomas` has been tested at the University of California, Riverside and at South Coast Field Station, Irvine, Calif. for resistance to Phytophthora root rot caused by Phytophthora cinnamomi. It has also been tested for root rot resistance in various avocado groves in Southern California.
In the drawings:
FIG. 1 shows the typical mature green fruit of the `Thomas` variety, prior to ripening.
FIG. 2 shows the general shape and leaf color of the `Thomas` selection.
`Thomas` has two primary characteristics that distinguish it. It has high field resistance to Phytophthora root rot. It is a Mexican variety and is well-adapted to California conditions.
Resistance to Phytophthora cinnamomi has been tested in many experiments with `Thomas` in the field. `Thomas` has consistently proved to be a superior rootstock with respect to Phytophthora root rot resistance. In an extremely severe test where the trees were deliberately inoculated with Phytophthora at planting time, `Thomas` was evaluated as having the highest resistance among twelve selections tested. These selections included `Duke 7`, `G755A`, `G755B`, and `Toro Canyon` which are currently available for commercial use.
TREES AND FOLIAGE
`Thomas`, as is the case with the majority of avocado varieties, does not have distinctive foliage. The leaves have a distinct anise scent when crushed, which typifies the Mexican horticultural race.
FRUIT
Ovate; 150-200 grams. Typical Mexican type. Fruit color is purple with distinct speckling when ripe. With reference to the Munsell Color Charts typically `Thomas` has a skin color (deep purplish red, Munsell Hue 7.5 RP 3/9). The season is about November through December.
The following chart represents ratings of the `Thomas` variety compared with other root rot resistant varieties according to observations made at the Goleta Ranch Test Plot on May 30, 1985.
______________________________________                                    
                      AVERAGE    AVERAGE                                  
            TOTAL #   GROWTH     % GROWTH                                 
SELECTION   TREES     DIFF.      INCR.                                    
______________________________________                                    
DUKE 7      88        22.44      57.69                                    
G755C       88        21.19      58.25                                    
TORO CANYON 87        21.47      62.78                                    
D9          56        17.31      57.50                                    
G6          55        22.55      59.93                                    
THOMAS      54        23.53      63.12                                    
G755A       32        24.58      61.16                                    
G755B       28        22.80      60.23                                    
G6#1        30        11.96      49.79                                    
BORCHARD    30        18.74      59.66                                    
HUNTALAS    24        11.42      42.07                                    
P1          23        14.40      52.98                                    
P.3         29        14.82      54.89                                    
P.6         27        14.10      50.87                                    
P.par       11        18.17      59.97                                    
BARR        21        18.65      55.68                                    
DUKE 6      18        17.54      56.05                                    
G1008       12        7.29       34.22                                    
______________________________________

Claims (1)

We claim:
1. The new and distinct rootstock variety of avocado tree herein described and illustrated and identified by the characteristics enumerated above.
US07/099,440 1987-09-21 1987-09-21 Avocado tree called Thomas Expired - Lifetime USPP6628P (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07/099,440 USPP6628P (en) 1987-09-21 1987-09-21 Avocado tree called Thomas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/099,440 USPP6628P (en) 1987-09-21 1987-09-21 Avocado tree called Thomas

Publications (1)

Publication Number Publication Date
USPP6628P true USPP6628P (en) 1989-02-21

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Family Applications (1)

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US07/099,440 Expired - Lifetime USPP6628P (en) 1987-09-21 1987-09-21 Avocado tree called Thomas

Country Status (1)

Country Link
US (1) USPP6628P (en)

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Date Code Title Description
AS Assignment

Owner name: REGENTS OF THE UNIVERSITY OF CALIFORNIA, THE, UNIV

Free format text: ASSIGN THE ENTIRE INTEREST SUBJECT TO CONDITIONS IN AGREEMENT RECITED;ASSIGNORS:COFFEY, MICHEAL D.;GUILLEMET, FRED B.;REEL/FRAME:004807/0765

Effective date: 19870903