Thesis (MSc (Genetics))--University of Stellenbosch, 2005. / The Russian wheat aphid, Diuraphis noxia (Mordvilko), is a serious insect pest of wheat and
barley. It affects the quality and yield of grain by sucking plant sap from the newest growth
whilst toxic substances are injected that destroy plant tissue. The Russian wheat aphid also
acts as a vector of plant viruses. The cultivation of aphid resistant cultivars is the preferred
control strategy and nine resistance genes, designated Dn1 to Dn9, have been identified.
Another undesignated gene, Dnx, was found in the wheat accession PI220127. Mapping of the
resistance genes relative to known markers will improve their use in breeding programs.
The dominant RWA resistance gene, Dn5, was identified in the accession PI294994
and mapped to chromosome arm 7DL. However, recent reports have placed Dn5 on ...
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/1584 |
| Date | 03 1900 |
| Creators | Heyns, I.C. |
| Contributors | Marais, G. F., University of Stellenbosch. Faculty of Agrisciences. Dept. of Genetics. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 3466754 bytes, application/pdf |
| Rights | University of Stellenbosch |
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