Genetic Variation in Tropical Meloidogyne Species
In tropical regions the parthenogenetic Meloidogyne spp. are major crop pests. The presence of populations in West Africa which overcome resistance in cultivars as diverse as tomato cv. ‘Rossol’, sweet potato cv. ‘CDH’ and soya bean cv. ‘Forrest’ has been reported (Prot, 1984; Fargette and Braaksma, 1990). The relationship of these populations to other tropical Meloidogyne spp. was investigated as the nature of such resistance breaking populations has implications both for integrated control and for appropriate quarantine measures. At a broader level, variation within the various tropical Meloidogyne spp. is also of interest to gain an understanding of the extent of genetic variation in this important group of pests.
KeywordsIntraspecific Variation RAPD Analysis RAPD Data Quarantine Measure Scottish Crop Research Institute
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- Fargette, M., and Braaksma, R., 1990, Use of the esterase phenotype in the taxonomy to the genus Meloidogyne. 3. A study of some “B” race lines and their taxonomic position, Revue Nématol. 13:375.Google Scholar
- Prot, J.C., 1984, A naturally occurring resistance breaking biotype of Meloidogyne arenaria on tomato. Reproduction and pathogenicity on tomato cultivars Roma and Rossol, Revue Nématol. 7:23.Google Scholar
- Sambrook, J., Fritsch, E.F., and Maniatis, T., 1989, Molecular cloning. A laboratory manual, Cold Harbor Laboratory Press, Vol. 1, 2 and 3.Google Scholar
- Vrain, T.C., Wararchuk, D.A., Lévesque, A.C., and Hamilton, R.L., 1992, Intraspecific rDNA restriction fragment length polymorphism in the Xiphinema americanum group, Fundam. appl. Nematol. 15:563.Google Scholar
- Xue, B., Baille, D.L., Beckenbach, K., and Webster, J.M., 1992, DNA hybridization probes for studying affinities of three Meloidogyne populations, Fundam. appl. Nematol. 15:35.Google Scholar