Plant husbandry – Process
Patent
1984-11-28
1986-02-18
Bagwill, Robert E.
Plant husbandry
Process
47DIG1, A01H 102
Patent
active
045703809
ABSTRACT:
An improved procedure utilizing a cytoplasmic-genetic male sterile system for forming F.sub.1 hybrid cottonseeds (i.e., seeds capable of forming hybrid cotton plants of the first filial generation) is provided which is readily amenable to the determination and maintenance of the desired level of purity in the hybrid cottonseed product. The parent plants required for hybrid formation are each homozygotes (as described) with respect to differing leaf shape configurations (i.e., the male sterile female parent plants have a broad-leafed configuration and the fertility-restoring male parent has a narrow-leafed configuration). The resulting F.sub.1 hybrid cotton plants are heterozygotes with respect to leaf shape phenotype and can be visually differentiated from each parent. Following the F.sub.1 hybrid-forming cross-pollination, at least a portion of the resulting cottonseeds are grown, and the approximate proportion of F.sub.1 hybrid cottonseeds present in the cottonseed product is determined on the basis of the respective leaf shapes which are exhibited. The plurality of the hybrid-forming parental lines additionally can be enhanced with ease through an observation of the respective leaf shape configuration followed by the timely removal of contaminant cotton plants which lack the requisite leaf configuration. The process of the present invention accordingly provides an efficient route to overcome quality control difficulties heretofore associated with hybrid cotton production in the prior art.
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Longoria Jose L.
Ray Levon L.
Bagwill Robert E.
Ciba-Geigy Corporation
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