Abstract
We examined sib-mated lines of the phytophagous mite, Tetranychus urticae Koch, for trade-offs in performance on different plants. We found no significant trade-offs among 10 potential host plants examined. Trade-offs in performance were not detected in most cases, even when the variations in general performance (mean performance on all potential host plants) among the sib-mated lines were statistically adjusted, denying the possibility that this may be due to the variations in general performance among the lines. No evidence for trade-offs was obtained in an artificial selection experiment; on all tested plants, a line adapted to one marginal host plant exhibited higher performance than the control line. However, the general performance seemed to be negatively correlated with other adaptive traits of the mite, such as competition ability of adult males for their mates and overcrowding response of adult females. Such correlations may contribute to the maintenance of genetic variation in the general performance of T. urticae.
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Yano, S., Takabayashi, J. & Takafuji, A. Trade-offs in performance on different plants may not restrict the host plant range of the phytophagous mite, Tetranychus urticae. Exp Appl Acarol 25, 371–381 (2001). https://doi.org/10.1023/A:1017926017081
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DOI: https://doi.org/10.1023/A:1017926017081