Geographic variation in critical photoperiod for diapause induction and its temperature dependence in Hyphantria cunea Drury (Lepidoptera: Arctiidae)
Geographic variation in critical photoperiod for diapause induction and its temperature dependence in Hyphantria cunea Drury (Lepidoptera: Arctiidae)
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DOI：
10.1007/s004420050220
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发表时间：
1997-07-01
期刊：
影响因子：
2.7
通讯作者：
Gomi, T
中科院分区：
文献类型：
--
作者：
Gomi, T
美国白蛾是世纪前从北美传入日本的一种重要害虫。滞育诱导的临界光周期及其温度依赖性，定义为20和25摄氏度之间的临界光周期的差异，进行了研究，以了解背后的机制从二到三化性的生活周期的转变。南方三化性种群滞育诱导的临界光周期短于北方二化性种群，且在25 ℃下比在20 ℃下更显著。虽然临界光周期与原始纬度呈正相关，但在两种温度下的相关性都相对较低。相反，滞育诱导的临界光周期的温度依赖性与原始纬度呈负相关。三化性种群对温度的敏感性大于二化性种群。这些结果表明，滞育对光周期反应的温度敏感性的增加参与了三化性生活史的转变。杂交试验表明，滞育诱导的光周期控制和温度依赖性受多基因控制，不存在性连锁。
The fall webworm, Hyphantria cunea Drury (Lepidoptera: Arctiidae), was introduced from North America to Japan half a century ago. The critical photoperiod for diapause induction and its temperature dependence, as defined by the difference in the critical photoperiod between 20 and 25 degrees C, were investigated in order to understand the mechanisms behind a shift from bi- to trivoltine life cycles. The critical photoperiod for diapause induction was shorter in the southern trivoltine populations than in the northern bivoltine populations, and this was more marked at 25 degrees C than at 20 degrees C. Although the critical photoperiod showed a positive correlation with the original latitude, the correlation was relatively low at both temperatures. Conversely, temperature dependence of the critical photoperiod for diapause induction correlated negatively with the original latitude. The trivoltine populations showed,greater temperature sensitivity than the bivoltine populations. These results suggest that an increase in temperature sensitivity of the diapause response to photoperiods was involved in the shift to a trivoltine life cycle. The crossing experiments suggested that the photoperiodic control of diapause induction and its temperature dependence are under polygenic control without sex-linkage.