Method of creating a spring brassica napus
AssigneeCargill, Incorporated
InventorsZhizheng Chen, Benyuan Dang, Daren Kenneth Coonrod
Life of this patent
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Abstract
Crossing a winter B. napus line with a rapid-cycle B. rapa line has been discovered to provide an unexpectedly simple and efficient way to create a modified B. napus with a spring flowering habit. In one implementation, such a modified B. napus or its progeny is crossed with a second winter B. napus line to produce a plant having a winter flowering habit. This allows one to significantly shorten the development cycle for winter-flowering B. napus lines by conducting part of the breeding program with spring-flowering time cycles, then migrating the resultant germplasm back into a winter-flowering line.
Claims20
A method for producing a modified Brassica napus, comprising:
- crossing a first winter B. napus line with a rapid-cycle B. rapa line having a mean flowering time under standardized growing conditions of no greater than 20 days in a first cross, thereby producing an F1 modified B. napus plant that has a spring flowering habit;
- and
- thereafter, crossing seed from the F1 modified B. napus plant (or progeny thereof) with a second winter B. napus line in a second cross to produce a plant that has a spring flowering habit.
A method for producing a modified Brassica napus having a winter flowering habit, comprising:
- crossing a first winter B. napus line with a rapid-cycle B. raga line having a mean flowering time under standardized growing conditions of no greater than 20 days in a first cross, thereby producing an F1 modified B. napus plant that has a spring flowering habit;
- thereafter, crossing the F1 modified B. napus plant (or progeny thereof) with a second winter B. napus line in a second cross to produce a first backcross population and selecting from the first backcross population a first backcross (BC1) plant that has a spring flowering habit;
- and
- thereafter, crossing the BC1 plant or progeny thereof with a third winter B. napus line in a third cross to produce a second backcross plant population and selecting from the second backcross population at least one second backcross (BC2-W) plant that has a winter flowering habit.
Dependencies are inferred from the claim text.