Abstract
Excised roots of six potato selections were challenged with egg inoculum of fourMeloidogyne species:M. chitwoodi, M. javanica, M. incognita, andM. hapla. The dual cultures were established under aseptic conditions in 60 × 15 mm petri plates on a defined agar medium. Egg hatch occurred within one week and galling within four weeks at incubation temperature of 24°C. All six potato selections, Russet Burbank, White Rose, PAS 3065,S. sparsipilum 365343.A19-12,S. sparsipilum ×S. phureja 856D68-1, and NDTX8731-1R supported reproduction of all fourMdoidogyne species. Corresponding greenhouse tests were run with eachin vitro experiment to establish the efficacy of this screening technique compared to greenhouse methods. Results from the greenhouse assays had less variation within cultivar treatment than did the results from thein vitro assays. Thein vitro assay, however, may be conducted with less labor, time, and greenhouse facility management.
Compendio
Se expusieron raíces cortadas de seis selecciones de papa al inóculo (huevos) de cuatro especies deMeloidogyne: M. chitwoodi, M. javanica, M. incognita yM. hapla. Cultivos duales fueron establecidos bajo condiciones asépticas en platos de petri de 60 × 15 mm con un medio definido de agar. La eclosión de los huevos se produjo en una semana y la formación de agallas en cuatro semanas a una temperatura de incubación de 24°C. Las seis selecciones de papa, Russet Burbank, White Rose, PAS 3065,S. sparsipilum 365343.A19-12,S. sparsipilum ×S. phureja 856D68-1 y NDTX8731-1R permitieron la reproduction de las cuatro especies deMeloidogyne. Las pruebas correspondientes de invernadero fueron llevadas a cabo con cada experimentoin vitro para establecer la eficacia de esta técnica de evaluation y selectión en comparación con los métodos de invernadero. Los resultados de las pruebas en el invernadero variaron menos dentro del tratamiento de cultivares que los resultados obtenidos de las pruebasin vitro. Sin embargo, la pruebain vitro puede conducirse con menos trabajo, tiempo y manejo de las instalaciones de invernadero.
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Rivera-Smith, C.E., Ferris, H. & Voss, R.E. The application of an excised root assay for the determination of susceptibility or resistance to root-knot nematodes (Meloidogyne spp. Goeldi) in potatoes (Solanum spp. L.). American Potato Journal 68, 133–142 (1991). https://doi.org/10.1007/BF02853894
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DOI: https://doi.org/10.1007/BF02853894