Geographic variation of diapause intensity in the spider mite Tetranychus urticae
Geographic variation of diapause intensity in the spider mite Tetranychus urticae
复制标题
二斑叶螨滞育强度的地理变异
DOI：
10.1111/j.1365-3032.1993.tb00448.x
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发表时间：
1993
影响因子：
1.5
通讯作者：
A. Veerman
中科院分区：
文献类型：
--
作者：
D. S. Koveos;A. Kroon;A. Veerman
抽象的。来自西欧和中欧不同地区的八个二斑叶螨品系，纬度范围从40.5到60 oN，在19 oC的滞育维持短日照光周期制度下，滞育终止所需的4 oC的冷却时间表现出显着差异，螨在寒冷期后转移到该制度。该品系来源的纬度越高，滞育终止所需的低温时间越长，表明滞育强度存在梯度，品系来源越北方，滞育越深。
Abstract. Eight strains of the spider mite Tetranychus urticae, originating from different localities in western and central Europe, with latitudes ranging from 40.5 to 60oN, displayed marked differences in the period of chilling at 4oC required for diapause termination under a diapause‐maintaining short‐day photoperiodic regime at 19oC, to which the mites were transferred after the cold period. The higher the latitude from which the strains originated the longer was the period of chilling required for diapause termination, suggesting the presence of a gradient in diapause intensity, diapause being deeper the more northern the origin of the strains.