取食经验对烟粉虱寄主适应性的影响

利用寄主适应性评价模型,研究了B型烟粉虱Bemisia tabaci种群在玉豆、扶桑、芙蓉和烟草4种寄主上连续多代的寄主适应性变化.结果显示,烟粉虱种群能够随着取食经验的积累而快速提高寄主适应性水平,但是不同寄主之间存在很大的差异性.寄主转移试验的结果则显示,烟粉虱通过取食经验获得的适应性改良不能够稳定遗传,说明烟粉虱种群在不改变遗传基础的情况下具备快速调节寄主适应性水平的能力.

The Effect of Feeding Experiences on Host Adaptation of Bemisia tabaci

Host performance of whitefly,Bemisia tabaci on Phaseolus vulgaris,Hibiscus mutabilis,Hibiscus rosa-sinensis and Nicotiana tabacum were evaluated by the models developed previously.The results indicated that whitefly populations were able to improve the host performance dramatically since continuously feeding on particular host species,but the improving process was different among the host plants.With the host transferring experiments,the improved host performance by accumulation of feeding experience could not inherit,and the host performance would return to primary level as long as disappearing selection pressure.it was implicated that the whitefly populations could be able to adjust their host performance and have its host adaptation rapidly without any transformation of genetic structure.