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: 5/15/2000 Publication Date: 6/30/2000 Citation: Porter, D.R. 2000. Aphid resistance breeding. In: Partners in Progress. Wheat Research at OSU 1998-1999. Oklahoma Agricultural Experiment Station Report. P-974:9. Interpretive Summary: Summary report; no new research information provided; no interpretive summary required. Technical Abstract: Three aphids pose serious threats to profitable wheat production in Oklahoma every year. The bird cherry-oat aphid, Russian wheat aphid, and greenbug cause losses through direct feeding injury, transmission of diseases, and increased production costs associated with chemical control measures. The cooperative program established between OSU and USDA-ARS, Stillwater, has brought the latest and best technologies to bear in developing aphid-resistant wheat cultivars for Oklahoma. The goal is to transfer the very best genetic sources of resistance to each aphid into high-performance wheat cultivars as quickly as possible. Over the past year, we have attempted to adapt a new screening technique for identifying resistance to the BCO aphid in seedling wheat. As this screening technique is perfected, new genetic sources of resistance will be found and moved into the OSU breeding pipeline. Several advanced experimental wheat lines with high levels of Russian wheat aphid resistance were identified and incorporated into statewide replicated yield trials. Several promising resistant wheat lines should emerge in the next few years. Work on greenbug-resistant wheat is progressing. Unfortunately, a candidate cultivar (OK95616-14C) with good resistance to greenbug was recently dropped from the program due to shortcomings in grazing compatibility, acid soil tolerance, and test weight. Other experimental lines in various stages of development will have better levels of resistance to the greenbug. |
