US3861079A
Expired / Lapsed
US
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Procedures for use of genic male sterility in production of commercial hybrid maize
Assignee: University of Illinois at Urbana-Champaign
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Filing: 1972-12-18
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Granted: 1975-01-21
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Expires: 1992-12-18
Abstract
Abstract Procedures for use of genic male sterility in the production of commercial hybrid maize, including producing and maintaining seed stocks substantially of a homozygous male sterile genotype and stocks substantially of a heterozygous, male sterile allele and male fertile allele, genotype, which include a differentially transmitted variation of chromosomal constitution.
Inventors
- 👤 Earl Byron Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:33
CPC Classifications
A; A01; A01H; A01H1/00; A01H1/02; A01H1/022; A01H1/023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A maize seed product which upon growth yields a pollenbearing maize plant essentially incapable of transmitting to progeny, through its pollen, the male fertile allele hereditary factor but-for-which the plant would be incapable of bearing pollen, said seed product being manufactured from progenitor maize stock by manual pollination and confirmation to impart heterozygosity for male sterile and male fertile alleles of a selected male sterile gene locus as well as genetic linkage of said male fertile allele hereditary factor with a differentially transmitted variation of chromosomal constitution.
Claim 2
Dependent Claim
87 words
A maize seed product which upon growth yields a pollenbearing maize plant essentially incapable of transmitting to progeny, through its pollen, the male fertile allele hereditary factor but-for-which the plant would be incapable of bearing pollen, said seed product being manufactured from progenitor maize stock by manual pollination and confirmation to impart heterozygosity for male sterile and male fertile alleles of a selected male sterile gene locus as well as genetic linkage of said male fertile allele hereditary factor with a differentially transmitted variation of chromosomal constitution.
Claim 3
Dependent Claim
18 words
The maize seed produce of claim 1 wherein said variation of chromosomal constitution comprises a chromosomal segment deficiency.
Claim 4
Dependent Claim
16 words
The maize seed product of claim 2 wherein said chromosomal segment deficiency is a terminal deficiency.
Claim 5
Dependent Claim
16 words
The maize seed product of claim 2 wherein said chromosomal segment deficiency is an internal deficiency.
Claim 6
Dependent Claim
27 words
The maize seed product of claim 1 wherein said variation of chromosomal constitution comprises a chromosomal duplication-deficiency including a chromosomal segment deficiency and a chromosomal segment triplication.
Claim 7
Dependent Claim
20 words
The maize seed product of claim 5 wherein said locus of said male sterile gene is proximal to said deficiency.
Claim 8
Dependent Claim
21 words
The maize seed product of claim 5 wherein said locus of said male sterile gene is included in the segment triplicated.
Claim 9
Dependent Claim
74 words
An isolated stock of maize seed which upon growth yields a population of maize plants displaying genic male sterility in a proportion to the total plant population greater than would, owing to the recessive character of the genic hereditary factor responsible for the display of such male sterility, occur naturally, said stock having a greater than 50 percent proportion of maize seed homozygous for male sterile alleles at a selected male sterile gene locus.
Claim 10
Dependent Claim
74 words
An isolated stock of maize seed which upon growth yields a population of maize plants displaying genic male sterility in a proportion to the total plant population greater than would, owing to the recessive character of the genic hereditary factor responsible for the display of such male sterility, occur naturally, said stock having a greater than 50 percent proportion of maize seed homozygous for male sterile alleles at a selected male sterile gene locus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |