| Autor: |
Graham, D. H., Holmes, J. L., Higgs, S., Beaty, B. J., Black, W. C. |
| Zdroj: |
Journal of Medical Entomology; November 1999, Vol. 36 Issue: 6 p671-671, 1p |
| Abstrakt: |
The genetic basis of transovarial transmission of La Crosse virus in Aedes triseriatus (Say) was investigated through selection experiments on 2 mosquito strains. One strain was subject to selection for transovarial transmission refractoriness, the other for permissiveness to transovarial transmission. Response to selection for a low filial infection rate was rapid, decreasing from 18 to 3% in 3 generations. However, no response to selection for permissiveness was observed in the other strain; the average filial infection rates through 4 generations fluctuated between 25 and 40%. By contrast, the transovarial transmission rate in both strains showed a consistent response to selection in both directions. These patterns are consistent with a model in which transovarial transmission is controlled by a single genetic locus and permissiveness is conditioned by dominant alleles; whereas the filial infection rate is nongenetic and influenced by stochastic factors in the mosquito and virus. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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