Variable correspondence of female host preference and larval performance in a phytophagous ladybird beetle Epilachna pustulosa (Coleoptera: Coccinellidae)
Variable correspondence of female host preference and larval performance in a phytophagous ladybird beetle Epilachna pustulosa (Coleoptera: Coccinellidae)
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植食性瓢虫 Epilachna pustulosa（鞘翅目：瓢虫科）雌性寄主偏好与幼虫表现的可变对应关系
DOI：
10.1046/j.1440-1703.2001.00405.x
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发表时间：
2001
影响因子：
2
通讯作者：
H. Katakura
中科院分区：
文献类型：
--
作者：
N. Fujiyama;H. Katakura
引起蓟种内变异的遗传和环境因素。通过简单的食物选择试验和幼虫的饲养，对植食性瓢虫的寄主植物进行了调查。使用了两个蓟无性系(T1U1和T4H2)，最初相距约12公里。以前的研究表明，成虫对T1U1的喜好好于T4H2，在原位观察无性系的叶片时，T1U1的幼虫表现更好。这两个无性系在移植到一个普通花园后，保留了它们对甲虫的偏好特征。然而，T1U1和T4H2在幼虫性能方面的差异在移植后缩小。在不同光照强度下，T1U1幼虫幼虫对成虫没有表现出明显的喜好。幼虫羽化率随叶片日照强度的增加而显著增加。这些结果有力地表明，遗传和环境因素都参与了蓟质量在甲虫偏好和/或性能上的克隆间变异。结果表明，蓟叶的品质主要受环境因素的影响，而对甲虫的喜好则完全受遗传因素的影响。在某些条件下，化脓性粉虱雌虫可能表现出不适应的行为，选择不适合幼虫生长的植物，或不选择适合幼虫生长的植物。
Genetic and environmental factors causing intraspecific variation of the thistle Cirsium kamtschaticum Ledeb. as a host plant of the phytophagous ladybird Epilachna pustulosa Kôno were investigated through simple food-choice tests and rearing of larvae. Two thistle clones (T1U1 and T4H2) were used, originally growing approximately 12 km apart. A previous study showed that adult female ladybirds preferred T1U1 to T4H2, and that larval performance was better on T1U1, when leaves from the clones in situ were examined. The two clones retained their characteristics with respect to beetle preference after transplantation into a common garden. However, the difference between T1U1 and T4H2 with respect to larval performance was reduced after the transplantation. When leaves from shoots of T1U1 exposed to different sunlight intensities were offered, adult female ladybirds did not show obvious preferences. Larval eclosion rates increased significantly with the increase in leaf sunlight intensity exposure. These results suggest strongly that both genetic and environmental factors are involved in interclonal variation of thistle quality in beetle preference and/or performance. It is suggested that the quality of thistle leaves for larval performance is largely affected by environmental factors, while leaf quality for beetle preference may be determined strictly by genetic factors. Under certain conditions, E. pustulosa females may behave maladaptively, preferring plants not appropriate for larval growth, or not choosing plants appropriate for the larval growth.