Multicellular living organisms and unmodified parts thereof and – Plant – seedling – plant seed – or plant part – per se – Higher plant – seedling – plant seed – or plant part
Patent
1996-11-12
1999-11-02
Robinson, Douglas W.
Multicellular living organisms and unmodified parts thereof and
Plant, seedling, plant seed, or plant part, per se
Higher plant, seedling, plant seed, or plant part
800298, 800265, 800269, A01H 500, A01H 104
Patent
active
059774436
ABSTRACT:
A plant in the Compositae family in which the Nr gene, for resistance to Nasonovia ribisnigri (a troublesome lettuce aphid) is present without any associated genetic information responsible for "Compact growth and Rapid Aging," or CRA, at least to the extent that the CRA phenotype is not expressed. The resistance gene preferably originates from L. virosa. The removal or change of the genetic information resulting in the CRA phenotype is caused by recombination event(s) in the vicinity of the gene. Plants are generally selected in which one or more recombination events have taken place, either in the same or in successive generations. Such recombination events may be accomplished either by meiotic crossing-over or by the use of molecular biology tools such as the AFLP technique known in the art.
REFERENCES:
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Briggs, F.N. et al., "Principles of Plant Breeding," Introduction to Plant Breeding, 1967, pp. 162-174.
Eenink, A.H. et al., Inheritance of Resistance to the Leaf Aphid Nasonovia ribis-nigri in the Wild Lettuce Species Lactucavirosa, Euphytica, vol. 32, 1983, pp. 691-695.
Smith, John M. et al., "A new source of resistance to downy mildew," The Grower, 1989, pp. 54-55.
Eenink et al. Resistance of lettuce (Lactuca) to the leaf aphid Nasonovia ribis nigri 1. Transfer of resistance from L. virosa to L. sativa by interspecific crosses and selection of resistance breeding lines. Euphytica. vol. 31. pp. 291-299, 1982.
Kimball Melissa L.
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Robinson Douglas W.
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