朱砂叶螨抗炔螨特品系相对适合度  

Relative fitness of propargite-resistant strain of Tetranychus cinnabarinus(Boisduval)(Acari:Tetranychidae)

作　　者：罗雁婕[1] 杨振国[1] 王丹[2] 谢道燕[1] 丁伟[2] 

机构地区：[1]云南省农业科学院蚕桑蜜蜂研究所,云南蒙自661101 [2]西南大学植物保护学院,重庆400715

出　　处：《生态学杂志》2015年第10期2827-2832,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31201546和31272058)资助

摘　　要：为明确朱砂叶螨抗炔螨品系的相对适合度,在朱砂叶螨敏感品系(SS)的基础上使用炔螨特持续筛选34代获得了炔螨特抗性品系(PRR34)。通过统计2个品系的实验种群生命表,对其发育历期、繁殖力及种群参数差异进行了比较。结果表明,朱砂叶螨敏感品系经炔螨特持续筛选34代后(PPR34),其抗性倍数为37.78。与SS品系相比,PPR34卵孵化率、发育历期和世代周期均无显著差异,但产卵前期显著延长了37.07%,单雌产卵量减少14.61%,雌雄性(♀/♂)比增加了23.38%。采用Weibull分布拟合存活曲线模型为DeeveyⅠ型,SS品系和PRR34品系的参数c值分别为2.04和2.38。其种群趋势指数、内禀增长率(rm)、净生殖率(R0)分别为123.78、0.24和25.34,以及111.91、0.26和28.99;PRR34品系的相对适合度为1.14,与敏感品系相比存在一定优势。因此,与敏感品系相比,朱砂叶螨抗炔螨特品系单雌产卵量下降,但雌性比增加,种群适合度优势较高,可能导致抗性种群迅速增长并增加防控难度。To identify the relative fitness of roparg te-r sist nt strain of Tetranychus cinnabarinus, a propargite-resistant strain （PRR34） was established after 34-generation selection of the susceptible strain （SS） by using propargite. The differences in development, reproduction, and population parameters between these two strains were analyzed by comparing experimental popula- tion life table. The result showed that after 34-generation, the resistance ratio of PRR34 increased to 37.78-fold. Compared with SS, the hatching rate of eggs, duration of development stages, and generation time of PRR34 showed no difference, but its preoviposition period significantly increased by 37.07%, the fecundity of single female decreased by 14.61%, and the ratio of female/male （♀/♂ ） increased by 23.38%. The survival curve was determined as Deevey I according to Weibull distribution, and the parameter c for SS and PRR34 were 2.04 and 2.38, respectively. The population tendency index, intrinsic rate of increase （rm） , and net reproduc- tion rate （R0） were 123.78, 0.24 and 25.34 for SS, and 111.91, 0.26 and 28.99 for PRR34, respectively. Besides, the relative fitness of PRR34 was 1.14, which showed advantage over SS. In conclusion, compared with SS, the fecundity of single female of PRR34 decreased, but its fe- male ratio and population fitness increased, which may result in the expansion of the resistant strain population and the increase of difficulty for pest control.

关 键 词：繁殖力 生命表 适合度 种群趋势指数 抗药性 

分 类 号：S433.7[农业科学—农业昆虫与害虫防治]