Search for genotypes resistant to the three strains of maize mosaic virus
| MSI99P1011 | |
| Autrey, L. J. C. Ricaud, C. | |
| Search for genotypes resistant to the three strains of maize mosaic virus | |
| Gevers, H. O.;Whythe, I. V. (eds), Proceedings of the Sixth South African Maize Breeding Symposium, held at Cedara College, Pietermaritzburg, March 20-21, 1984 | |
| Book chapter | |
| 1985 | |
| Technical Communication, 202 | |
| p. 56 | |
| South Africa, Dept. of Agriculture and Water Supply | |
| Abstract only | |
| En | |
| En | |
| An extensive programme for evaluating reaction of maize genotypes to the three strains of maize mosaic virus (MMV), a rhabdovirus transmitted by the planthopper vector Peregrinus maidis Ashmead, was carried out in Mauritius. Genotypes imported from Europe and Africa, pure lines from Mauritius and Rodrigues as well as progeny from crosses between them and also crosses between pure lines from Rodrigues and foreign hybrids were evaluated in the glasshouse and in the field, to the three strains of virus designated as MMV-Fine, MMV-Coarse and MMV-Broken. In the glasshouse all imported genotypes, except hybrid United 530, proved susceptible, while a whole range of reaction from susceptibility to high resistance was found in local pure lines and hybrids issuing from them. Sequential inoculation of different genotypes with the same virulifeorus colonies of P. maidis proved a satisfactory method for the evaluation of reaction to MMV and is being adopted for assessing reaction of genotypes in the glasshouse on a routine basis. Imported genotypes could not be evaluated in the field owing to their susceptibility to maize streak virus (MSV) which masks MMV. The local genotypes showing resistance to MSV could however be evaluated and results were in agreement with those obtained in the glasshouse. Correlation between glasshouse and field reactions was obtained for MMV-Fine. Lack of correlation for MMV-Coarse and MMV-Broken was attributed to the low infection by these strains in the field. There was no genotype x strain interaction. As MMV-Fine proved to be the most aggressive strain assessment of reaction to MMV should be carried out with that strain only. No correlation was found between reaction to MMV and MSV indicating that resistance to these viruses are controlled by different genes. | |
| MAIZE MAIZE MOSAIC VIRUS VARIETIES BREEDING DISEASE RESISTANCE VIRUSES DISEASES | |
| MAURITIUS | |
| Maize breeding | |
| 1992-06-23 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| FC | |
| CAT | |
| 1 | |
| PATH |