Submitted to: International Congress of Genetics Proceedings
Publication Type: Proceedings
Publication Acceptance Date: July 20, 2003
Publication Date: July 20, 2003
Citation: YU, M.H. DEVELOPING SUGARBEET WITH RESISTANCE TO MELOIDOGYNE SPP. INTERNATIONAL CONGRESS OF GENETICS PROCEEDINGS. 2003. p. 163. Technical Abstract: Root-knot nematodes (Meloidogyne spp.) are important sugarbeet (Beta vulgaris L.) pathogens that are difficult to control. Host-plant resistance was discovered from rare strains of the wild beet, B. vulgaris ssp. maritima (L.) Arcang. The resistance is effective against multiple species and races of nematode belonging to the genus Meloidogyne, based on J2 inoculation tests. Incorporation of resistance to root-knot nematode into sugarbeet was carried out through hybridization and back-crossing to sugarbeet in the greenhouse. Selection against annual bolting, disease susceptibility, and root morphology was done from field plantings. The intensity of sprangled root structures and easy bolting habits decreased with selection pressure and as the number of breeding generations progressed. Promising sugarbeet plants with stable resistance transmission and improved taproot conformation eventually developed. Two series of root-knot nematode resistant sugarbeet genotypes, Mi-1 and M66, were generated. From these sources several Beta germplasm lines with resistance to Meloidogyne spp. have been developed and released.