松毛虫赤眼蜂种群间的形态学比较研究

COMPARATIVE STUDIES ON THE MORPHOLOGY OF GEOGRAPHIC/HOST POPULATIONS OF TRICHOGRAMMA DENDROLIMI [HYM :TRICHOGRAMMATIDAE] IN CHINA

从我国８个省（市）的落叶松毛虫、油松毛虫、赤松毛虫、马尾松毛虫和思茅松毛虫中采到的８个松毛虫赤眼蜂种群，经米蛾卵饲养后，亲代及子代均用于形态学观察。这８个种群的雄外生殖器构造相当一致，但根据雄虫触角棒节上刚毛的相对长度可以分成３组。表现出有明显的种群地理分化。位于较高纬度的北京和内蒙古种群属长毛组、触角棒节上刚毛相对较长；位于较低纬度的湖南和云南种群属短毛组；来自吉林、山东。

Eight populations of Trichogramma dendrolimi were collected from De ndrolimus superans,D.tabulaeformis,D.spectabilis,D.punctata and D.kikuchii in 8 provinces or municipality of China.They were propagated with eggs of Co rcyra cephalonica in a rearing room of constant temperature and humidity with 14 hours photophase.Both parental and filial generations were examined for morph ological diagnosis.Structures of the male genitalia of the 8 populations were fo und identical.Yet the populations could be divided into three rather distinctive groups according to the ratio of the length of flagellum setae over the width o f antenna flagellum.The differentiation among the three groups appeared to be ge ological.The populations from Beijing and Inner Mongolia,which are in high latit ude,had long setae,those from Yunnan and Hunan Provinces,in low latitude,had sho rt setae;while the remaining four populations had medium length setae were from Guangxi,Shandong,Zhejiang and Jilin Provinces.ANOVA and Ducan′s test were used in data analysis.