摘要
调查了不同寄主上棉蚜Aphis gossypll自受精卵孵化出的自然种群、室内混合饲养以及单个饲养蚜虫的体色变化。结果表明:不论是自然还是实验种群,是群体还是个体饲养,不论寄主、栽培条件、生育期营养相同与否,棉蚜体色在世代内稳定不变,即出生时是什么颜色保持终生不变;在世代间则随温度升高体色渐变为黄色,温度降低体色逐渐转绿。伏蚜由苗蚜而来。X^2检验证实:棉蚜体色变化与营养、寄主种类、光照、光质、栽培条件等无关,仅与温度密切相关,属于同一基因型在不同环境条件下的反应规范。但在木槿上还发现有个别深黄色棉蚜,从卵孵化到迁飞体色不随温度变化,表明棉蚜体色变化中还存在遗传多态现象。胚胎学观察与染色体核型分析结果证实了上述结论与观点。
The body colour variation in cotton aphids (Aphis gossypii) of the natural population de-veloped from zygotes on different host plants and of the population raised from aphids reared individually in the laboratory were investigated. Results showed that: the body colour of the aphids would remain unchanged as the new-born aphids during their whole life within each generation whatever the populations, the individuals, the hosts and the nutritional conditions may be. But among the successive generations,the body colour changed gradually from green to yellow with rising temperature and from yellow to green with decreasing temperature. X test demonstrated that there was no correlation between the body colour variation and the nut-rients, the host plant, the light and the culturing condition. The variation only correlated to temperature. This is in accord with the phenomenon that under different environmental con-ditions the same genotype expresses differently to give rise body colour polymorphism.However, a few dark yellow colour aphids found on the host plant Hibiscus syriacus dis-played no change in colour with temperature during their development and transformation to migratory form. It seems there exists a genetic polymorphism of body colour among the aphids. This was proved by the results of observation on embryo development and analysis of karyotype of the insect.
出处
《昆虫学报》
CAS
CSCD
北大核心
1993年第3期282-289,共8页
Acta Entomologica Sinica
关键词
棉蚜
生态遗传学
遗传多态
Aphis gossypii-ecological genetics -genetic polymorphism-reac-tion norm
