Author
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Yu, Ming |
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Submitted to: International Institute For Beet Research Proceedings
Publication Type: Proceedings Publication Acceptance Date: 2/26/2003 Publication Date: 3/20/2003 Citation: YU, M.H. PROGRESS IN DEVELOPMENT OF SUGARBEET WITH RESISTANCE TO ROOT-KNOT NEMATODE. INTERNATIONAL INSTITUTE FOR BEET RESEARCH PROCEEDINGS. 2003. p. 35. Interpretive Summary: N/A Technical Abstract: Sugarbeet is an important source of sucrose for commercial processing and is a favored host of root-knot nematode. Host resistance to Meloidogyne spp. was not found in the cultivated sugarbeet, but was identified from wild maritima beets. The resistance has been successfully introgressed into sugarbeet genotypes. Observations on several breeding populations were conducted in infested and noninfested field plots. Under nematode infested and high temperature conditions, all susceptible control plants were heavily infected, more than 66% of them had gall symptoms, and the rest were dead. In comparison, an average of 77% of plants in resistant families produced healthy roots while the rest were infected. In backcrossed populations, approximately 44% of plants exhibited resistance, and over one-half of infected plants died. These studies confirmed the strength and inheritance of root-knot nematode resistance in sugarbeet. Positive results were demonstrated by the improved taproot conformation and root weights. Further development of marker-assisted selection protocols for efficient identification of resistant genotypes will facilitate sugarbeet breeding. Additional improvements on these breeding materials are needed to develop an elite sugarbeet line. |
