Aphid resistance in composites
US5977443A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01H1/06
- WIPO fieldFood chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.