What is it about?
Russian wheat aphid biotype classification is based on the response of a differential set of wheat lines containing specific resistance genes. RWASA3 is classified as a distinct biotype based on the fact that it renders Yumar, a winter wheat cultivar from the USA which contains resistance gene Dn4, susceptible. When testing other Dn4 containing wheat lines with RWASA3, we found that not all plants were susceptible as we expected.
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Why is it important?
This indicates that: 1. RWASA3 has some discriminatory power and can detect differences in different Dn4 containing plants that we were previously unaware of 2. Dn4 may not be a single resistance gene but may consist of several genetic parts
Perspectives
Using a biotype like RWASA3 for further research will enable us to unravel the genetic control of RWA resistance
Dr Vicki L Tolmay
Agricultural Research Council-Small Grain, South Africa
Read the Original
This page is a summary of: Resistance evaluation of wheat germplasm containingDn4orDnyagainst Russian wheat aphid biotype RWASA3, Journal of Applied Entomology, October 2012, Wiley,
DOI: 10.1111/jen.12008.
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