植物保护2025，Vol.51Issue(1)：80-88,9.DOI:10.16688/j.zwbh.2024055
异色瓢虫黑化突变体ml在两种不同食物条件下的抗紫外线能力测定
Determination of the UV-resistance of a melanism mutant ml of Harmonia axyridis under two different food conditions
摘要
Abstract
UV radiation significantly affects insects,but individuals with different degrees of cuticle melanism vary in their resistance to UV radiation.Food is an important factor affecting the cuticle melanism of insects.In this study,the melanism mutant(ml)and the wild type(wt)of Harmonia axyridis were reared with two different foods,i.e.,pea aphid(Acyrthosiphon pisum)or artificial diet,and the larvae at different stages(1st instar to 4th instar)were exposed to UV.After exposure,the cumulative survival rate in subsequent stages,developmental duration,and adult body weight were measured to evaluate the UV-resistance of the two phenotypes as well as the influences of UV-exposure stage.The results showed that:1)Under both foods conditions,the ml type versus wt type had a relatively higher survival rate in most development stages and,in most cases,had shortened developmental time after their 1st to 4th instar larvae exposed to UV.Meanwhile,ml had significantly higher body weight when the 1st instar larvae exposed to UV;2)UV exposure of early-stage larvae(1st instar and 2nd instar)resulted in the lowest subsequent survival rates,but ml had significantly better fitness than wt in UV-exposure treatment of the 1st instar larvae.The highest survival rates were observed in UV-exposure treatment of the 4th instar larvae,but no significant difference was detected between the two phenotypes;3)For both phenotypes,pea aphid-fed individuals exhibited higher UV-resistance than those feeding on artificial diet.However,food factor exhibited different influences on survivals of the two phenotypes.In conclusion,the melanism mutant demonstrated stronger UV-resistance than wt,and their UV-resistance affected by the UV-exposure stage and the food type.This study provides a theoretical foundation for further research on the stress resistance of H.axyridis and the identification of biocontrol agents adapted to different environments.关键词
异色瓢虫/黑化突变体/存活率/发育历期/体重Key words
Harmonia axyridis/melanism mutant/survival rate/developmental duration/body weight分类
农业科技引用本文复制引用
李媛,秦亚龙,孙元星,郝亚楠..异色瓢虫黑化突变体ml在两种不同食物条件下的抗紫外线能力测定[J].植物保护,2025,51(1):80-88,9.基金项目
甘肃省青年科技基金计划(21JR7RA848) （21JR7RA848）
甘肃农业大学伏羲青年英才培养计划(Gaufx-03Y05) （Gaufx-03Y05）
