Author
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PORTER, DAVID |
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Submitted to: Oklahoma Agriculture Experiment Station Departmental Publication
Publication Type: Experiment Station Publication Acceptance Date: 7/1/2004 Publication Date: 8/1/2004 Citation: Porter, D.R. 2004. Aphid resistance. In: Partners in Progress. Wheat Research at OSU 2003. Oklahoma Agriculture Experiment Staion Report. P-1004:8. Interpretive Summary: Technical Abstract: The 2003 growing season brought a significant change to the Russian Wheat Aphid (RWA) population in the United States. A new virulent form of RWA was detected in southeast Colorado that was able to damage wheat varieties developed with genetic resistance to RWA. The new damaging RWA has now been found in Texas, Colorado, and Nebraska. Surveys and sampling are being conducted in Oklahoma, but this new biotype of RWA has not yet been detected in our wheat fields. Despite this new threat, we have some good news to report. Resistance to this new RWA biotype already exists within our advanced wheat breeding lines. Several adapted breeding lines undergoing field performance trials carry gene(s) that confer resistance to the original RWA and also to the new virulent biotype. Other work is ongoing to identify and characterized wheat-breeding lines with resistance to the bird cherry-oat aphid. New sources of resistance will be confirmed, and genes controlling resistance will be integrated into the wheat improvement program. These resistance genes, along with greenbug and RWA resistance genes, are making their way into the background of several high performance wheat breeding lines under selection in the variety development program. |
