US4326358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrids
Assignee: Mycogen Plant Science Inc
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Filing: 1980-07-17
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Granted: 1982-04-27
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Expires: 2000-07-17
Abstract
Abstract New hybrid seed varieties and plants therefrom are rapidly developed and commercially produced. New hybrid seeds can be readied for market in as little as three years, compared to the conventional eight to twelve years required for preexisting techniques of hybrid seed production. Plant breeders are no longer limited to homozygous parents in the production of new hybrids.
Inventors
- 👤 Robert H. Lawrence, Jr.
- 👤 Phillip E. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:54
CPC Classifications
A; A01; A01H; A01H1/00; A01H1/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
A process for rapidly developing hybrids and commercially producing hybrid seeds, comprising: (a) selecting a first parent plane and a second parent plant; (b) crossing said first parent plant with said second parent plant to obtain original-parent-derived hybrids that are phenotypically uniform; (c) cloning said first parent plant to produce a first cloned parental line; and (d) crossing plants of said first cloned parental line with said second parent plant or with a second parental line produced therefrom to obtain hybrid seeds which yield hybrids that are phenotypically uniform, provided that when said second parent plant is heterozygous and a second parental line produced therefrom is used in the crossing of step (d), said second parental line must be produced by cloning.
Claim 2
Dependent Claim
122 words
A process for rapidly developing hybrids and commercially producing hybrid seeds, comprising: (a) selecting a first parent plane and a second parent plant; (b) crossing said first parent plant with said second parent plant to obtain original-parent-derived hybrids that are phenotypically uniform; (c) cloning said first parent plant to produce a first cloned parental line; and (d) crossing plants of said first cloned parental line with said second parent plant or with a second parental line produced therefrom to obtain hybrid seeds which yield hybrids that are phenotypically uniform, provided that when said second parent plant is heterozygous and a second parental line produced therefrom is used in the crossing of step (d), said second parental line must be produced by cloning.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein said second parent plant is heterozygous.
Claim 4
Dependent Claim
17 words
The process according to claim 1 wherein both of said first and second parent plants are heterozygous.
Claim 5
Dependent Claim
23 words
The process according to claim 1 wherein the crossing of step (d) is between said second parent plant and said first parental line.
Claim 6
Dependent Claim
23 words
The process according to claim 1 wherein the crossing of step (d) is between said second parental line and said first parental line.
Claim 7
Dependent Claim
32 words
The process according to claim 1 wherein said second parent plant is homozygous and the second parental line produced therefrom is obtained by cloning or inbreeding to produce said second parental line.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein cloning is achieved by vegetative propagation.
Claim 9
Dependent Claim
28 words
The process according to claim 1 wherein the pollen donor of the crossing of step (d) is derived from the pollen donor of the crossing of step (b).
Claim 10
Dependent Claim
96 words
A process for rapidly developing hybrids and commercially producing hybrid seeds in high yield, resulting in improved properties of hybrids therefrom, comprising: (a) crossing pairs of parent plants to produce sets of experimental original-parent-derived hybrids; (b) selecting at least one set of optimum original-parent-derived hybrids from among said sets of experimental original-parent-derived hybrids; (c) obtaining parental lines from each parent plant which produced the selected set of optimum original-parent-derived-hybrids by cloning any heterozygous parent plant and cloning or inbreeding any homozygous parent plant, and (d) crossing the plants in said parental lines to produce hybrid seeds.
Claim 11
Dependent Claim
96 words
A process for rapidly developing hybrids and commercially producing hybrid seeds in high yield, resulting in improved properties of hybrids therefrom, comprising: (a) crossing pairs of parent plants to produce sets of experimental original-parent-derived hybrids; (b) selecting at least one set of optimum original-parent-derived hybrids from among said sets of experimental original-parent-derived hybrids; (c) obtaining parental lines from each parent plant which produced the selected set of optimum original-parent-derived-hybrids by cloning any heterozygous parent plant and cloning or inbreeding any homozygous parent plant, and (d) crossing the plants in said parental lines to produce hybrid seeds.
Claim 12
Dependent Claim
17 words
The process according to claim 9 wherein at least one of said parent plants is heterozygous. PG,44
Claim 13
Dependent Claim
14 words
The process according to claim 9 wherein both of said parent plants are heterozygous.
Claim 14
Dependent Claim
13 words
The process according to claim 9 wherein cloning is achieved by vegetative propagation.
Claim 15
Dependent Claim
28 words
The process according to claim 9 wherein the pollen donor of the crossing of step (d) is derived from the pollen donor of the crossing of step (a).
Claim 16
Dependent Claim
14 words
The process according to claims 1 or 9 wherein said plants are tomato plants.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |