US3903645A
Expired / Lapsed
US
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Hybrid soybean production
Assignee: DeKalb Genetics Corp
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Filing: 1974-03-29
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Granted: 1975-09-09
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Expires: 1994-03-29
Abstract
Abstract Heretofore there has been an unfilled need for an efficient process for the production of seed capable of growing F1 hybrid soybean plants. The first commercially practicable solution to this need is described. A substantially uniform first population of atypical soybean plants having exposed floral stigmas and the propensity to yield seed of a small size is grown adjacent to a substantially uniform second population of soybean plants having the propensity to yield seed of a larger size. The soybean plants of the first population are capable of undergoing crosspollination with the aid of pollen carrying insects as well as self-pollination. Following cross- and self-pollination and seed formation seed selectively is recovered from the plants of the first population, and is segregated on the basis of seed size with the relatively larger seed resulting from the crosspollination being capable of growing F1 hybrid soybean plants. In a preferred embodiment of the process the plants of the first population additionally exhibit a characteristic wherein the dehiscence of anther tissue to discharge pollen is delayed at least until the florets open, and/or produce less than the normal quantity of viable pollen commonly observed in soybean plants thereby tending to enhance the relative proportion of crosspollination occurring in the first population. The relative purity of the resulting F1 hybrid seed following separation on the basis of seed size can be confirmed by providing a recessive genetic gene marker (e.g. a particular flower color) in the first population of plants and a corresponding dominant gene marker in the second population plants. When cross-pollination occurs, the recessive marker which is perpetuated upon self-pollination is no longer observable. If desired the seed capable of growing F1 hybrid plants may be used as foundation seed for the production of F2 planting seed which continues to exhibit an appreciable degree of enhanced vigor and seed yield compared to standard later generation soybean varieties, following the selfpollination of same.
Inventors
- 👤 Norman R Bradner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:13
CPC Classifications
A; A01; A01H; A01H1/00; A01H1/02; A01H5/00; A01H5/10; A01H6/00; A01H6/54; A01H6/542; Y; Y10; Y10S; Y10S47/00; Y10S47/01
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
207 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and selfpollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination. b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of pollen carrying insects and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, and d. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination.
Claim 2
Dependent Claim
207 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and selfpollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination. b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of pollen carrying insects and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, and d. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination.
Claim 3
Dependent Claim
63 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein said plants of said first substantially uniform population additionally exhibit a characteristic wherein the dehiscence of anther tissue to discharge pollen is delayed at least until the florets open thereby tending to enhance the relative proportion of cross-pollination occurring in said first population.
Claim 4
Dependent Claim
52 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein said plants of said first substantially uniform population additionally produce less than the normal quantity of viable pollen thereby teNding to enhance the relative proportion of cross-pollination occuring in said first population.
Claim 5
Dependent Claim
33 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein said plants of said first and second populations are grown in alternating strips.
Claim 6
Dependent Claim
38 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 which includes the additional step of selectively recovering seed which has formed upon said plants of said second population.
Claim 7
Dependent Claim
26 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein said pollen carrying insects are bees.
Claim 8
Dependent Claim
79 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein said plants of said first population which are grown in step (a) additionally contain a genetic marker which visually can be observed in progeny plants when self-pollination occurs within the plants of the first population in step (b) and which is absent in the progeny plants when cross-pollination occurs within the plants of the first population in step (b).
Claim 9
Dependent Claim
49 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein the average seed size produced upon self-pollination of said soybean plants of said second population exceeds that of said first population by at least 10 grams per 100 seeds.
Claim 10
Dependent Claim
53 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 1 wherein at least a portion of said relatively larger seed obtained from the physical segregation of step (d) additionally is planted, the resulting plants allowed to self-pollinate, and the thus formed F2 seed harvested.
Claim 11
Dependent Claim
257 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma, the characteristic wherein the dehiscence of anther tissue to discharge pollen is delayed at least until the florets open, and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination, with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and self-pollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination, and with said plants of said first population and said plants of said second population being grown in alternating strips, b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of bees and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, d. selectively recovering seed which is formed upon said plants of said second population, e. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination.
Claim 12
Dependent Claim
257 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma, the characteristic wherein the dehiscence of anther tissue to discharge pollen is delayed at least until the florets open, and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination, with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and self-pollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination, and with said plants of said first population and said plants of said second population being grown in alternating strips, b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of bees and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, d. selectively recovering seed which is formed upon said plants of said second population, e. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination.
Claim 13
Dependent Claim
51 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 10 wherein said plants of said first substantially uniform population produce less than the normal quantity of viable pollen thereby tending to enhance the relative proportion of cross-pollination occurring in said first population.
Claim 14
Dependent Claim
79 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 10 wherein said plants of said first population which are grown in step (a) additionally contain a genetic marker which visually can be observed in progeny plants when self-pollination occurs within the plants of the first population in step (b) and which is absent in the progeny plants when cross-pollination occurs within the plants of the first population in step (b).
Claim 15
Dependent Claim
28 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 12 wherein said genetic marker is a distinctive pubescence characteristic.
Claim 16
Dependent Claim
28 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 12 wherein said genetic marker is a distinctive flower color.
Claim 17
Dependent Claim
49 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 10 wherein the average seed size produced upon self-pollination of said soybean plants of said second population exceeds that of said first population by at least 10 grams per 100 seeds.
Claim 18
Dependent Claim
53 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 10 wherein at least a portion of said relatively larger seed obtained from the physical segregation of step (e) additionally is planted, the resulting plants allowed to self-pollinate, and the thus formed F2 seed harvested.
Claim 19
Dependent Claim
349 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma, the characteristic wherein the dehiscence of another tissue to discharge pollen is delayed at least until the florets open, the characteristic of producing less than the normal quantity of viable pollen commonly observed in soybean plants, a genetic marker which visually can be observed in progeny plants when self-pollination occurs, and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination, with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and self-pollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination and with the seed resulting from said cross-pollination yielding progeny which lack said genetic marker, and with said plants of said first population and said plants of said second population being grown in alternating strips, b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of bees and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, d. selectively recovering seed which is formed upon said plants of said second population, e. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination, f. growing at least a portion of said relatively larger seed resulting from said separation of step (e), and g. determining the purity of said relatively larger seed with respect to F1 hybrid content by observing the incidence of a genetic marker in the resulting plants.
Claim 20
Dependent Claim
349 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants comprising: a. growing a first substantially uniform population of soybean plants having an exposed floral stigma, the characteristic wherein the dehiscence of another tissue to discharge pollen is delayed at least until the florets open, the characteristic of producing less than the normal quantity of viable pollen commonly observed in soybean plants, a genetic marker which visually can be observed in progeny plants when self-pollination occurs, and the propensity to yield seed of a relatively small size upon self-pollination in pollinating proximity to a second substantially uniform population of soybean plants which have the propensity to yield seed of a relatively larger size upon self-pollination, with said soybean plants of said first population being inherently capable of undergoing both cross-pollination and self-pollination and forming seed upon cross-pollination with pollen derived from said plants of said second population which generally is larger than seed formed upon self-pollination and with the seed resulting from said cross-pollination yielding progeny which lack said genetic marker, and with said plants of said first population and said plants of said second population being grown in alternating strips, b. randomly cross-pollinating said plants of said first population with pollen derived from said plants of said second population with the aid of bees and randomly self-pollinating plants of said first population with pollen derived from said first population, c. selectively recovering seed which is formed upon said plants of said first population, d. selectively recovering seed which is formed upon said plants of said second population, e. physically segregating said seed recovered from said plants of said first population wherein relatively larger seed resulting from said cross-pollination which is capable of growing F1 hybrid soybean plants is separated from relatively smaller seed resulting from said self-pollination, f. growing at least a portion of said relatively larger seed resulting from said separation of step (e), and g. determining the purity of said relatively larger seed with respect to F1 hybrid content by observing the incidence of a genetic marker in the resulting plants.
Claim 21
Dependent Claim
28 words
A process for the efficient proDuction of seed capable of growing F1 hybrid soybean plants according to claim 17 wherein said genetic marker is a distinctive pubescence characteristic.
Claim 22
Dependent Claim
28 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 17 wherein said genetic marker is a distinctive flower color.
Claim 23
Dependent Claim
49 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 17 wherein the average seed size produced upon self-pollination of said soybean plant of said second population exceeds that of said first population by at least 10 grams per 100 seeds.
Claim 24
Dependent Claim
53 words
A process for the efficient production of seed capable of growing F1 hybrid soybean plants according to claim 17 wherein at least a portion of said relatively larger seed obtained from the physical segregation of step (e) additionally is planted, the resulting plants allowed to self-pollinate, and the thus formed F2 seed harvested.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |