Geographic variation in diapause induction under constant and changing conditions in Helicoverpa armigera
Geographic variation in diapause induction under constant and changing conditions in Helicoverpa armigera
复制标题
DOI：
10.1111/j.1570-8703.2006.00483.x
复制
发表时间：
2006-12
影响因子：
1.9
通讯作者：
K. Shimizu;K. Fujisaki
中科院分区：
文献类型：
--
作者：
K. Shimizu;K. Fujisaki
研究了棉铃虫（h<s:1> bner）和棉铃虫（guen<s:1> e）当地种群滞育率的变化与幼虫期光周期和（或）温度变化的关系。日本温带地区的一种土生植物——刺竹（H. assulta）在温带种群中，即使在适宜的温度条件下，幼虫期只有光周期减少时，滞育诱导的发生率也很高。这种依赖于光周期的反应可能允许H. assulta在温度条件恶劣的温带提前很好地预见秋天的开始。相比之下，主要分布在亚热带地区的入侵多食性棉蚜，温带种群只有在光周期和温度都降低时才会出现高的滞育发生率，而在相同条件下，亚热带种群的滞育发生率非常低。此外，温带和亚热带的棉铃虫种群都在持续的低温条件下进入滞育。因此，棉铃虫对滞育诱导刺激（光周期和温度的变化）的敏感性存在地理差异。这种变异可能是日本棉铃虫实现的气候适应的一部分。
Variation in the incidence of diapause in local populations of Helicoverpa armigera (Hübner) and Helicoverpa assulta (Guenée) (Lepidoptera: Noctuidae) was examined in relation to changes in photoperiod and/or temperature during the larval period. Temperate zone populations of H. assulta, a native species in temperate Japan, showed a high incidence of diapause induction when only the photoperiod was decreased during the larval period, even at favorable temperatures. This photoperiod‐dependent response may allow H. assulta to foresee the beginning of autumn well in advance in the temperate zone, where temperature conditions are severe. In contrast, temperate zone populations of H. armigera, an invasive and polyphagous species mainly distributed in the subtropics, showed a high incidence of diapause only when both photoperiod and temperature decreased, whereas subtropical populations showed a very low incidence of diapause under the same conditions. Furthermore, both temperate zone and subtropical populations of H. armigera enter diapause under constant low temperatures at short‐day photoperiod. Thus, there is geographic variation in sensitivity to diapause‐inducing stimuli (changes in photoperiod and temperature) in H. armigera. This variation may be a part of the climatic adaptation achieved by H. armigera in Japan.