A - Human Necessities – 01 – H
Patent
A - Human Necessities
01
H
47/4
A01H 1/02 (2006.01)
Patent
CA 1303856
HYBRIDIZATION PROCESS UTILIZING A COMBINATION OF CYTOPLASMIC MALE STERILITY, CYTOPLASMIC HERBICIDE TOLERANCE, AND HERBICIDE TOLERANCE ATTRIBUTABLE SOLELY TO NUCLEAR GENES Abstract of the Disclosure The present invention provides a convenient route for producing a predetermined hybrid variety of a crop which is capable of undergoing both self-pollination and cross-pollination. Cytoplasmic male sterile plants which also exhibit cytoplasmic herbicide tolerance (i.e., to a Type A herbicide) and tolerance to a different herbicide attributable solely to nuclear genes (i.e., to a Type B herbicide) are the key plants for use in the present process. The maintainer and restorer plants exhibit tolerance to different herbicides (i.e., to either a Type A herbicide or a Type B herbicide). The economical bulk planting of the parent plants is made possible during each step of the process. For instance, cytoplasmic male sterile plants, plants resulting from the self-pollination of a maintainer, and restorer plants can be grown in a substantially random population, with the self-pollinated main- tainer plants being destroyed by an appropriate herbicide prior to pollination, and the self- pollinated restorer plants being destroyed by an appropriate herbicide immediately following pollina- tion or in the subsequent generation. The process of the present invention is applicable to grain crops, forage crops, seed propagated fruits, seed propagated ornamentals, and industrial species. In a particu- larly preferred embodiment a predetermined variety of Brassica napus (i. e., rape or improved forms thereof known as canola) is formed which is the product of cross-pollination.
522681
Beversdorf Wallace D.
Erickson Lawrence R.
Grant Ian
Smart & Biggar
University Of Guelph
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