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Mapping of chromosome arm 7DL of Triticum aestivum L.

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 ...

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/1584
Date03 1900
CreatorsHeyns, I.C.
ContributorsMarais, G. F., University of Stellenbosch. Faculty of Agrisciences. Dept. of Genetics.
PublisherStellenbosch : University of Stellenbosch
Source SetsSouth African National ETD Portal
LanguageEnglish
Detected LanguageEnglish
TypeThesis
Format3466754 bytes, application/pdf
RightsUniversity of Stellenbosch

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