Zhao Chenchen, Ma Fangzhou, Chen Hongsong, Wan Fanghao, Guo Jianying, Zhou Zhongshi
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Key Laboratory of Biosafety, Ministry of Environmental Protection, Nanjing, China.
Front Physiol. 2018 Jun 5;9:666. doi: 10.3389/fphys.2018.00666. eCollection 2018.
Chill tolerance plays a crucial role that allows insect species to adapt to cold environments. Two Chinese geographical populations (Laibin and Yangzhou populations) were selected to understand the chill resistance and evolutionary potential in the , a biological control agent of the invasive common ragweed, . Super-cooling point assays, knockdown tests under static low-temperature conditions and determination of glycerol content were studied. ANOVAs indicated significant differences regarding chill coma recovery time, super-cooling point, and glycerol content across populations and sexes. The narrow-sense heritability () estimates of cold resistance based on a parental half-sibling breeding design ranged from 0.39 to 0.53, and the value was significantly higher in the Yangzhou population than in the Laibin population. Additive genetic variances were significantly different from zero for cold tolerance. The Yangzhou population of has a strong capability to quickly gain resistance to cold. We conclude that the beetle has a plasticity that can provide cold resistance in the changing climate conditions.
耐寒性起着至关重要的作用，使昆虫物种能够适应寒冷环境。选取了两个中国地理种群（来宾种群和扬州种群）来了解豚草条纹叶甲（一种入侵豚草的生物防治剂）的抗寒能力和进化潜力。研究了过冷却点测定、静态低温条件下的击倒试验以及甘油含量的测定。方差分析表明，不同种群和性别在冷昏迷恢复时间、过冷却点和甘油含量方面存在显著差异。基于亲本半同胞育种设计的耐寒性狭义遗传力（）估计值在0.39至0.53之间，扬州种群的该值显著高于来宾种群。耐寒性的加性遗传方差显著不为零。豚草条纹叶甲的扬州种群具有快速获得抗寒能力的强大能力。我们得出结论，豚草条纹叶甲具有可塑性，能够在不断变化的气候条件下提供抗寒能力。
